Constellation Monoceros (Unicorn)

Properties

Monoceros is an inconspicuous constellation surrounded by conspicuous constellations like Gemini in the north, Orion in the west and Canis Maior in the south. The band of the Milky Way runs across the constellation and supplies it with a multitude of open star clusters and bright, diffuse nebulae - including the star cluster of the Rosette Nebula, which can be seen with the naked eye. The constellation area is 482 square degrees and the center culminates around midnight on January 5th. ^{[9, 15]}

Stars with Proper Names:

?: Plaskett's Star

Data for constellation Monoceros ^[150]
IAU Name	Monoceros
IAU Genitive	Monocerotis
IAU Abbr.	Mon
English Name	Unicorn
Season (47° N)	October … March
Right Ascension	05^h 55^m 52^s … 08^h 11^m 24^s
Declination	-11° 22' 08" … +11° 56' 00"
Area	482 deg²
Neighbours (N↻)	Gem, Ori, Lep, CMa, Pup, Hya, CMi

Deep-Sky Object Descriptions

IC 446

Dreyer's Nebula
IC 447

Seagull Nebula
IC 2177

Messier 50

Rosette Nebula
NGC 2237+

NGC 2245

NGC 2247

Hubbles variable Nebula
NGC 2261

Conus Nebula
NGC 2264

Butterfly Nebula
NGC 2346

NGC 2353

History

Although unicorns play an essential role in numerous legends and fables, this constellation was not yet known in ancient times. It was included in his star map by Kepler's son-in-law, the mathematician Jakob Bartsch, in 1624 after it had been used sporadically beforehand. ^[7] Others attribute this constellation to Johannes Hevelius, who is said to have drawn it a few decades later, in 1690. ^[21]

Catalogs

Yale Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) ^[154]
HR	B	F	DM	HD	SAO	FK5	IR	M*	ADS	VarID	RA	Dec	vMag	spType	dMag	Sep ["]	Remarks
HR 2107		1	BD-09 1284	40535	132714					V474 Mon	05 59 01.0	-09 22 56	6.12	F2IV			SB:15.492d.,VAR:Delta Sct 5.93 - 6.36V, amp. 0.38 B, 0.13372, 0.13612 and 0.08261d; amp. var. in 7.7455d. Multiple periods.
HR 2108		2	BD-09 1285	40536	132715	2455					05 59 04.3	-09 33 30	5.03	A6IIIm vs			SB:9.3553d, K 57.1k/s, V0 +22.2k/s, asini 7.18.
HR 2128		3	BD-10 1349	40967	151037				4615		06 01 50.4	-10 35 53	4.95	B5III	3.5	1.9	D:Binary.,SB:ADS 4615A.
HR 2142			BD-06 1391	41335	132793					2817	06 04 13.5	-06 42 33	5.21	B2Ven v			RV:Rapidly rotating and variable hydrogen lines suggest recent ejection of equatorial shell.,S:Shell star.,VAR:5.20 - 5.23V, 80.85d, periodic shell phenomena.
HR 2150			BD-10 1368	41547	151098						06 05 27.0	-10 14 34	5.87	dF4
HR 2154			BD-04 1362	41692	132841	2467			4698		06 06 38.7	-04 11 38	5.38	B5IV	6.2	28.5
HR 2179			BD-05 1523	42278	132900						06 09 36.2	-05 42 40	6.17	F3IV w
HR 2195			BD-06 1439	42536	132924					V653 Mon	06 11 01.3	-06 45 15	6.15	A0pSrCr			VAR:Alpha CV, amp. 0.04U, 1.36:d.
HR 2202			BD-04 1393	42657	132941				4799	V638 Mon	06 11 43.7	-04 39 56	6.18	B9pHgMn	1.7	0.8	VAR:Alpha CV 6.16 - 6.18V, amp. 0.02y, 0.724d.
HR 2205			BD-06 1446	42690	132944						06 11 51.8	-06 33 01	5.05	B2V
HR 2224			BD-04 1421	43157	133003				4846		06 14 36.7	-04 34 06	5.83	B5V	6.0	1.7
HR 2227	γ	5	BD-06 1469	43232	133012	2475	I		4853		06 14 51.3	-06 16 29	3.98	K1.5IIIBa0.3	9.0	51.4	N:Called Alpha Mon in BAC and many early catalogues. Now HR 2970 is called Alpha Mon.
HR 2234			BD-04 1431	43319	133027				4865		06 15 29.7	-04 54 55	5.99	A5IV s	4.2	4.1
HR 2237			BD-08 1368	43362	133029				4866		06 15 26.0	-09 02 07	6.10	B9III	0.0	0.2	D:132.7y, e 0.52, a 0.24", i 55.7d, mag. diff 0.3.,DYN:0.005".
HR 2255		6	BD-10 1455	43760	151318						06 17 35.2	-10 43 31	6.75	F0Del Del
HR 2267			BD-09 1411	43993	133091		I				06 18 50.6	-09 23 25	5.36	K1.5III
HR 2270			BD-08 1386	44037	133098						06 19 07.9	-08 35 11	6.22	B9V
HR 2273		7	BD-07 1373	44112	133114	1170		S			06 19 42.8	-07 49 23	5.27	B2.5V
HR 2280			BD+02 1197	44333	113758				4971	2932	06 21 25.8	+02 16 07	6.31	A4.5V	0.6	0.3	D:6.8 A3V, 7.4 A6V, 120y, a = 0.448".,VAR:ADS 4971, 6.3 - 6.37V, combined mag. Difference between components varies from 0.2 to 1.5V. Uncertain which component is,VAR:var.
HR 2292			BD+03 1221	44700	113801						06 23 18.5	+03 45 52	6.40	B3V			G:Cas-Tau OB1.
HR 2295			BD-04 1484	44756	133199						06 23 22.7	-04 41 14	6.67	A2V
HR 2298	ε	8	BD+04 1236	44769	113810	244			5012 A		06 23 46.1	+04 35 34	4.44	A5IV	2.2	12.9	D:Binary with HR 2299. Combined light 4.30V, +0.21(B-V). Component C, 12.2v at 93".,SB:331d? Unresolved by speckle interferometry.
HR 2299			BD+04 1237	44770	113811				5012 B		06 23 46.5	+04 35 44	6.72	F5V	2.2	12.9	D:See HR 2298.
HR 2300			BD+08 1316	44783	113817						06 24 02.3	+08 53 05	6.26	B8Vn			RV:Recent determination of vsini 300k/s.
HR 2301			BD-09 1444	44816	133203		I				06 23 36.0	-09 52 28	6.19	K5
HR 2310			BD+07 1273	44990	113845					T Mon	06 25 13.1	+07 05 09	5.98	F7Iab-K1Iab			D:IUE observations suggest an early-type companion, about A0.,VAR:CDelta 5.58 - 6.62V, 27.0205d since 1933. Period has increased from 27.0093 before 1900, with mean value 27.024649d.
HR 2312			BD+01 1332	45050	113855			W			06 25 18.4	+01 30 04	6.66	B9V	0.0	0.1
HR 2313			BD-00 1287	45067	133229						06 25 16.4	-00 56 46	5.87	F8V
HR 2315			BD+02 1227	45137	113868						06 25 46.6	+02 16 20	6.51	A0V
HR 2317			BD-03 1425	45168	133238						06 25 47.1	-03 53 21	6.35	G9III			SB:428.1d, K 7.99k/s, V0 +15.85k/s, asini 45.4.
HR 2321			BD-07 1422	45239	133246						06 25 58.8	-07 53 39	6.40	A4V
HR 2324			BD-01 1242	45320	133260	2493					06 26 39.6	-01 30 26	5.87	A3Vn
HR 2325			BD-04 1510	45321	133257						06 26 34.5	-04 35 50	6.15	B2.5V			G:Open cluster NGC 2232 #2.
HR 2327			BD+00 1421	45357	113896						06 26 58.7	+00 50 27	6.71	A1Vn
HR 2328			BD-07 1429	45380	133263				5070		06 26 44.9	-07 30 41	6.27	A0Vn	2.3	21.1	D:Fixed sep.
HR 2333			BD+02 1237	45415	113906						06 27 20.4	+02 54 29	5.55	G9III
HR 2334			BD+00 1426	45416	113905		I				06 27 13.8	+00 17 57	5.20	K1II			N:77 Ori in Monoceros.
HR 2335			BD-00 1299	45433	133269		I				06 27 15.6	-00 16 34	5.55	K5III			N:78 Ori in Monoceros.
HR 2342			BD+10 1149	45512	95718						06 28 18.8	+10 18 14	6.15	K2III-IV
HR 2344		10	BD-04 1526	45546	133290	246		W			06 27 57.6	-04 45 44	5.06	B2V	4.2	77.2	G:Brightest star in open cluster NGC 2232, #1.
HR 2347			BD+02 1244	45563	113929						06 28 16.8	+01 54 44	6.48	B9V
HR 2351			BD+11 1193	45638	95732						06 29 00.0	+11 01 10	6.59	A9IV
HR 2355			BD+02 1253	45724	113940		I	W			06 29 14.9	+02 38 46	6.16	gM1	4.0	19.3
HR 2356	β	11	BD-06 1574	45725	133316				5107 A	2977	06 28 49.0	-07 01 58	4.60	B3Ve v	0.5	7.1	D:Triple system with HR 2357 and 2358. Combined mag., color 3.74V, -0.15(B-V), all Be stars. AB, 17000y; AC, sep. 10",,D:29000y. Component D, 12.2v at 26" from A. Uncertain which of components A,B,C, HR 2356,7,8 is the light variable,D:NSV 2977, for which the mag. 3.75V is a blend of all three.,S:Shell star with variable H alpha emission.,SB:12.5y, K 30k/s, asini 1900. Shell oscillations. Spectrum var. 12.5y for 3.5 cycles, then ceased.,VAR:Hydrogen lines var. K 30k/s. Shell line velocities do not correspond to orbital elements; may be due to gaseous ring.
HR 2357	β	11	BD-06 1575	45726	133317				5107 B	2977	06 28 49.5	-07 02 04	5.40	B3ne	0.5	7.1	D:See HR 2356.,DYN:0.008".,S:Shell star.
HR 2358	β	11	BD-06 1575	45727	0				5107 C	2977	06 28 49.5	-07 02 04	5.60 H	B3e	0.5	7.1	D:See HR 2356.,DYN:0.008".
HR 2362			BD+09 1259	45827	113957						06 30 05.5	+09 01 45	6.57	A0III			S:Also classified A0pSi.
HR 2367			BD-09 1493	45976	151573	2497	I				06 30 11.3	-10 04 53	5.93	K0
HR 2370			BD+11 1204	45995	95766				5153 A		06 31 09.5	+11 15 03	6.14	B2V:nne	2.8	16.1	D:Double emission lines of which red component variable intensity. Component B, 9.09V, -0.05(B-V), -0.30(U-B), B9IVe,,D:RV +6k/s, vsini 201k/s.,G:HII region; in cluster NGC 2264, region of expanding OB assoc. in gas and dust. See note for HR 2456.
HR 2374			BD+11 1207	46075	95783						06 31 39.2	+11 47 32	6.65	B6III			G:In HII region.
HR 2375			BD+11 1209	46089	95788						06 31 48.3	+11 32 40	5.23	A3V			G:Possible Eggen group with HR 63, q.v.
HR 2378			BD+11 1213	46178	95803				5170		06 32 23.3	+11 40 25	6.03	K0III	4.2	31.1	D:Optical.
HR 2381			BD-08 1462	46229	133369		I				06 31 50.1	-08 09 29	5.43	gK2
HR 2382		12	BD+04 1304	46241	114023					3017	06 32 19.2	+04 51 21	5.84	K0V			G:In field of open cluster NGC 2244 #56, the Rosette Nebula, associated with dense clouds of gas. Probable nonmember.
HR 2385		13	BD+07 1337	46300	114034	1174					06 32 54.2	+07 19 59	4.50	A0Ib			G:Mon OB1; in reflection nebula; member assoc. Mon R1 at 1050 pc.,VAR:R-I also found at -0.02.
HR 2386			BD-05 1678	46304	133382			W			06 32 23.1	-05 52 08	5.60	F0Vnn	7.7	4.2
HR 2395			BD-01 1274	46487	133404	1175					06 33 37.9	-01 13 13	5.10	B5Vn
HR 2404		14	BD+07 1357	46642	114085				5211	3031	06 34 46.4	+07 34 21	6.45	A0V s	4.0	10.5	D:Fixed sep.
HR 2406			BD+10 1186	46709	95870	2505	I				06 35 17.6	+09 59 18	5.88	K4III
HR 2409			BD+00 1491	46769	114097						06 35 15.8	+00 53 24	5.80	B8Ib
HR 2413			BD+04 1335	46885	114115						06 36 00.0	+04 29 51	6.55	B9III			G:Member cluster Collinder 107, a cluster possibly assoc. with a stellar ring.
HR 2418			BD-05 1710	47054	133469	2509					06 36 35.3	-05 12 40	5.52	B8V e			S:Shell star.
HR 2422			BD+06 1309	47129	114146					V640 Mon	06 37 24.1	+06 08 07	6.06	O8p			G:Mon OB2; in HII reg.; a SN remnant, D14. Near NGC 2264 in region of expanding OB assoc. in gas and dust. See note for HR,G:2456. Embedded in 21-cm emission.,M:Probably star of largest known mass for primary and secondary components, each about 50 solar masses.,N:Plaskett's star.,P:Intrinsic polarization, probably due to circumstellar matter.,S:Shell star. Also classified O8f and O7.5III(f), O8V + O8f.,SB:14.3961d, K 205.2k/s, V0 +24.9k/s, asini 40.6. Masses each about 55 solar. The secondary is underluminous for its,SB:mass and may be smaller than the primary. vsini secondary 130:k/s.,VAR:6.04 - 6.08V, irregular variations, possibly transition from O- to WR-type spectrum. Polarization variable.
HR 2426			BD+10 1201	47156	95914						06 37 36.9	+10 51 11	6.38	K0
HR 2430			BD+02 1315	47220	114154	2512					06 37 40.3	+02 42 15	6.17	K1III
HR 2432			BD+05 1334	47240	114162						06 37 52.7	+04 57 26	6.15	B1Ib			G:Mon OB2; near NGC 2264 in region of expanding OB assoc. in gas and dust. See note for HR 2456. At edge of Monoceros,G:loop. Supernova remnant possibly associated with HR 2432.
HR 2440			BD-02 1691	47420	133511		I				06 38 20.5	-02 32 37	6.14	K2
HR 2441			BD+04 1365	47431	114194						06 38 49.5	+04 42 02	6.57	B8IIIn			G:Near NGC 2264 in region of expanding OB assoc. in gas and dust. See note for HR 2456.
HR 2442			BD+01 1443	47432	114191					3060	06 38 38.1	+01 36 49	6.21	O9.5II			G:Mon OB1; exciting star of HII region S282 within 0.5d; 21-cm emission.,RV:7.5 hrs.,S:Luminosity class variously given as I, II and III (classified also as O9.5I and O9.7Ib). uv 1548 absorption strong,,S:emission weak.,VAR:Beta C? 6.2 - 6.25V, 7.5 hrs., possibly longest period Beta C type.
HR 2454			BD+06 1338	47756	114244						06 40 31.8	+06 22 18	6.51	B8IIISi
HR 2456		15	BD+10 1220	47839	114258		I		5322	S Mon	06 40 58.7	+09 53 44	4.66	O7V((f))	3.5	2.9	C:Color excess E(B-V) = +0.07.,D:AB binary, 4.8 Oe5, 7.6 B7; C, 9.9v B8V at 17", physical, vsini 141k/s; D, 9.7v A6III at 41", physical, vsini 115k/s;,D:E1 the brighter component of E, B5V at 74", probably optical, vsini 253k/s; E2, A0V, vsini 132k/s.,DYN:0.005".,G:In cluster NGC 2264 #131; HII reg. S273; Mon OB1; T-Tauri assoc., Mon T1. The cluster appears to be the nucleus of the,G:association. In region of neutral hydrogen. Ionized Mon OB1 region probably excited by S Mon. The electron density of,G:the HII region increases toward the center of the cluster. (Note that OB associations MonI = IIMon = Mon OB1 and MonII =,G:IMon = OB2. In conversions from the earlier designations to OB1 and OB2 these groups have occasionally been,G:interchanged; however, they may be related.),S:Also classified O8III((f)). uv 1240 absorption strong.,VAR:ADS 5322A, Ia? 4.62 - 4.67V. R-I also found at -0.11.
HR 2458			BD+11 1273	47886	95997		I				06 41 17.2	+11 00 12	6.11	M1III
HR 2461			BD+00 1546	47964	114269						06 41 05.4	+00 29 43	5.79	B8III
HR 2467			BD+06 1351	48099	114293		I				06 41 59.3	+06 20 42	6.37	O6.5V e			D:Some spectral lines appear double, indicating separation of about 110k/s and vsini of 90 and 75k/s.,G:Mon OB2; 21 cm emission; in HII region D14; in a SN remnant; near NGC 2264 in region of expanding OB assoc. in gas and,G:dust. See HR 2456.,S:Also classified O7V and O8f.
HR 2469			BD-09 1601	48217	133585		I				06 41 56.4	-09 10 02	5.19	M0III			G:Wolf 630 group.
HR 2474			BD+03 1371	48348	114312		I				06 43 06.5	+03 02 00	6.19	K0
HR 2479			BD+04 1414	48434	114324						06 43 38.7	+03 55 56	5.90	B0III			G:Mon OB2.,S:uv indicates sB0.5.
HR 2494		16	BD+08 1486	48977	114388	1177					06 46 32.4	+08 35 14	5.93	B2.5V			G:In HII region; near NGC 2264 in region of expanding OB assoc. in gas and dust. See note for HR 2456.
HR 2502			BD-09 1644	49147	151911	2521					06 46 39.0	-10 06 26	5.66	B9.5V
HR 2503		17	BD+08 1496	49161	114410		I				06 47 19.8	+08 02 14	4.77	K4III
HR 2506		18	BD+02 1397	49293	114428	258	I				06 47 51.6	+02 24 44	4.47	K0+IIIaBa0.2			S:Also classified K0III Ba 0.1.
HR 2508			BD-08 1558	49331	133679		I			3213	06 47 37.1	-08 59 54	5.07	M1+Ib-IIa			VAR:Amp. 0.06V.
HR 2514			BD-01 1386	49434	133687						06 48 19.0	-01 19 09	5.75	F1V
HR 2517			BD+01 1531	49567	114465						06 49 03.7	+01 00 07	6.15	B3II-III
HR 2521			BD-02 1776	49643	133718	1179		W			06 49 16.4	-02 16 19	5.74	B8IIIn	0.0	0.1
HR 2530			BD-00 1462	49933	133760				5505		06 50 49.9	-00 32 27	5.77	F2V	5.5	5.9	D:CPM.
HR 2534			BD-07 1592	49976	133761					V592 Mon	06 50 42.3	-08 02 28	6.29	A2pSrCrEu v			VAR:Alpha CV 6.16 - 6.32V, 2.9760d. Magnetic field and rotation same period. Strontium var.
HR 2543			BD+03 1437	50062	114525						06 51 39.3	+03 02 30	6.38	A2V s
HR 2551			BD+08 1543	50277	114556		I				06 52 49.4	+08 22 49	5.77	F0Vn
HR 2552			BD-05 1845	50282	133807						06 52 22.9	-05 18 58	6.30	K0
HR 2555			BD+11 1344	50371	96241						06 53 22.5	+10 59 47	6.24	K0III
HR 2570			BD-05 1863	50700	133855				5557		06 54 08.5	-05 51 09	6.41	A6Vn	0.1	1.2
HR 2572			BD-00 1487	50747	133870	2533					06 54 24.6	-01 07 37	5.45	A4IV			G:Possible Eggen group with HR 63, q.v.
HR 2577			BD-01 1446	50820	133881					3271	06 54 42.1	-01 45 23	6.21	B3IVe+K2II			RV:Pole on.,S:Also classified B3IVe+F.
HR 2582			BD-02 1827	50890	133890						06 54 58.8	-02 48 13	6.04	gG6
HR 2584			BD+08 1562	50931	114626						06 55 34.6	+08 19 29	6.29	A0V
HR 2589			BD+10 1335	51104	96294	2535					06 56 25.8	+09 57 23	5.92	B8Vn
HR 2599			BD-07 1642	51424	133937						06 57 00.1	-08 10 44	6.34	K0II-III+A2V
HR 2606			BD+07 1539	51693	114713						06 58 39.0	+07 37 19	6.27	A3V
HR 2610			BD+03 1488	51814	114722	2540			5648		06 58 57.0	+03 36 08	5.97	G8III	6.7	3.6
HR 2613			BD+07 1544	51892	114731						06 59 20.1	+07 19 01	6.35	B7III
HR 2622			BD-05 1910	52265	134031						07 00 18.0	-05 22 01	6.30	G0III-IV
HR 2624			BD-08 1662	52312	134036	1181		W			07 00 23.7	-08 24 25	5.96	B9III	6.7	1.5
HR 2627			BD-08 1667	52382	134041						07 00 39.3	-09 12 11	6.49	B1Ib			G:CMa OB1.
HR 2629			BD+05 1513	52479	114798						07 01 41.4	+04 49 05	6.63	A3V s
HR 2633			BD+05 1514	52559	114801						07 01 55.0	+05 33 27	6.59	B2IV-V			M:Old disk population runaway star.
HR 2636			BD-01 1509	52611	134073			W			07 01 52.9	-01 20 44	6.17	G5II	4.7	24.5
HR 2639			BD-05 1926	52666	134076		I			3341	07 01 56.4	-05 43 20	5.20	M2III
HR 2647			BD+09 1496	52913	114835						07 03 17.9	+09 08 18	5.97	A3V s
HR 2648		19	BD-04 1788	52918	134106	2547				V637 Mon	07 02 54.8	-04 14 21	4.99	B1V e			RV:Rotational velocity vsini 336k/s.,S:H alpha emission. uv indicates gB1.,VAR:Beta C 4.96 - 5.01V, 0.19120d, secondary 0.19740d, beat period 6.09d.
HR 2654			BD+01 1665	53205	114867			W			07 04 20.2	+01 29 18	6.57	A0V	0.9	90.4
HR 2655			BD-05 1943	53208	134133		I				07 04 05.2	-05 19 25	5.62	K3III
HR 2656			BD-09 1818	53240	152308						07 03 57.3	-10 07 27	6.45	B9IIIn e			S:H alpha emission.
HR 2663			BD+09 1510	53510	114899		I				07 05 39.1	+09 11 09	5.78	M0III
HR 2670			BD-10 1862	53755	152363				5782	V569 Mon	07 05 49.7	-10 39 40	6.49	B0.5V+F5III	3.6	38.3	D:Component B, 10.3v, F5III.,G:Exciting star of HII region S296. Doubtful if member of CMa OB1.,VAR:ADS 5782A, Beta C 6.42 - 6.53V, 0.267d? or 0.18d. Other indications from 4 to 10.4 hrs.
HR 2676			BD+05 1543	53929	114935						07 07 06.4	+04 54 37	6.11	B9.5III
HR 2694			BD-10 1892	54662	152470						07 09 20.3	-10 20 50	6.21	O6.5V			G:Exciting star of HII region S296; member assoc. CMa OB1-R1.,M:Possibly the center of SN explosion 0.8 million years ago.,S:Also classified O7III.
HR 2701		20	BD-04 1840	54810	134282	1186	I	W			07 10 13.7	-04 14 14	4.92	K0III	4.9	186.2
HR 2707		21	BD-00 1634	55057	134316					V571 Mon	07 11 23.6	-00 18 07	5.45	A8Vn-F3Vn v			VAR:Delta Sct 5.43 - 5.50V, 0.0999081 and 0.07500d, var. amp., beat per. 0.30083d. Sp. var.
HR 2714	δ	22	BD-00 1636	55185	134330	1187			5864		07 11 51.9	-00 29 34	4.15	A2V	9.2	32.0
HR 2731			BD-03 1804	55775	134391		I		5911		07 14 11.0	-03 54 05	5.75	K5III	5.0	2.7
HR 2732			BD-09 1921	55832	134395		I				07 14 15.5	-09 56 51	5.90	K3III
HR 2739			BD-10 1933	55879	152598						07 14 28.2	-10 19 00	6.03	B0III			G:CMa OB1; NGC 2353 #1; exciting star of HII region S296. NGC 2353, a cluster in which no appreciable amounts of neutral,G:or ionized hydrogen have been detected.
HR 2744		24	BD+00 1871	56003	134414				5933		07 15 19.3	-00 09 41	6.41	G5III	5.8	3.8
HR 2752			BD-10 1945	56207	152621						07 15 43.1	-10 35 02	5.95	K0
HR 2765			BD-06 2032	56614	134474		I				07 17 31.7	-06 40 48	6.29	K2
HR 2798			BD-08 1862	57517	134563						07 21 16.9	-08 52 42	6.55	F5
HR 2806			BD-08 1872	57682	134580						07 22 02.0	-08 58 45	6.43	O9V			G:CMa OB1; in HII reg. Ma 118.
HR 2807			BD-02 2079	57708	134585						07 22 18.5	-02 58 44	6.23	F5
HR 2811			BD-05 2089	57749	134588					3560	07 22 25.4	-05 58 58	5.82	F3IV			VAR:Delta Sct? 5.80 - 5.84V.
HR 2833			BD-05 2112	58526	134654						07 25 51.0	-05 46 30	5.97	G3Ib
HR 2838			BD-04 1943	58580	134658						07 26 03.5	-04 32 15	6.76	A0IV			SB:Small RV amp. Components equal Sp., but different rotations.
HR 2865			BD-01 1738	59311	134740	2578	I				07 29 18.7	-01 54 19	5.59	K5III
HR 2866			BD-07 1996	59380	134742						07 29 25.7	-07 33 04	5.86	F8V
HR 2867			BD-10 2067	59381	152941	2579	I				07 29 22.1	-10 19 36	5.75	K5III
HR 2876			BD-04 1979	59669	134774	2582					07 30 51.1	-05 13 35	6.24	K0
HR 2883			BD-08 1964	59984	134806				6158		07 32 05.8	-08 52 51	5.90	F5V	2.7	23.4	D:CPM?
HR 2920			BD-07 2065	60853	134883		I				07 36 16.6	-08 18 41	6.27	K2
HR 2927		25	BD-03 1979	61064	134899	289		W		3665	07 37 16.7	-04 06 40	5.13	F6III	5.3	121.7	D:AB, CPM. B, 13.2v at 26".,G:Hyades group.,VAR:Comp. A of multiple. Delta Sct?, amp. 0.01V, 1.5hr.
HR 2958			BD-07 2118	61749	134969						07 40 35.5	-08 11 09	6.01	A3IV
HR 2970	α	26	BD-09 2172	61935	134986	293	I				07 41 14.8	-09 33 04	3.93	K0III			N:In early catalogues called Gamma Mon; HR 2227 now called Gamma, was Alpha in BAC and numerous older,N:catalogues.
HR 3014			BD-06 2281	62902	135079		I				07 46 02.2	-06 46 21	5.49	K5III
HR 3047			BD-08 2096	63752	135158		I				07 50 10.6	-09 11 00	5.61	K3III
HR 3054			BD-10 2253	63894	153479	2609					07 50 55.2	-11 07 43	6.16	K0
HR 3072			BD-05 2280	64235	135205	2611		W		3777	07 52 47.9	-05 25 41	5.76	F5IV	0.3	0.2	D:6.4 F2, 6.7, 30.8y, a = 0.295".
HR 3122		27	BD-03 2157	65695	135345	304	I				07 59 44.1	-03 40 47	4.93	K2III
HR 3135			BD-02 2379	65875	135368					3857	08 00 44.1	-02 52 54	6.51	B2.5Ve v			G:Group around Zeta Mon.,S:Shell star displaying variable H alpha.,VAR:Gamma Cas?, 6.48 - 6.63V. Amp. at 0.58 micrometers about 0.10m.
HR 3141		28	BD-00 1882	65953	135380	2620	I			V645 Mon	08 01 13.3	-01 23 33	4.68	K4III			VAR:FK Com, amp. 0.020V, 0.025B, 0.030U, 0.207878d.
HR 3150			BD-05 2339	66242	135406	1213					08 02 26.0	-06 20 14	6.33	G0III
HR 3174			BD-08 2222	67159	135505				6588		08 06 27.5	-09 14 42	6.23	B9V	1.7	30.8	D:B is A0. BC double 8.6, 13.0 sep. 1".
HR 3188	ζ	29	BD-02 2450	67594	135551		I		6617		08 08 35.6	-02 59 02	4.34	G2Ib	4.9	66.0	D:B, 10.1v G8II at 33" optical. C is K2III.,G:Group around Zeta Mon.
HR 3189			BD-10 2400	67725	153887						08 08 56.9	-11 20 23	6.32	A0Vn

Revised+Historic NGC/IC, Version 22/9, © Dr. Wolfgang Steinicke ^[277]
Planetary Nebulae
Name	RA	Dec	Type	bMag	vMag	Dim	Dreyer Description	Identification, Remarks
NGC 2346	07 09 22.5	-00 48 22	PN	11.8	11.6	0.87	* 10 nff with S, vF, neb	PK 215+3.1, CS=11.2
Galactic Nebulae
Name	RA	Dec	Type	bMag	vMag	Dim	Dreyer Description	Identification, Remarks
NGC 2149	06 03 30.7	-09 43 50	RN			3 × 2	F, * 12 inv	vdB 66
NGC 2170	06 07 31.3	-06 23 53	RN			2 × 2	* 9 in vF, pL neb, E 170°	LBN 994
NGC 2182	06 09 30.9	-06 19 35	RN			2 × 2	pB *, L neb, E 90° ±	LBN 998
NGC 2183	06 10 46.9	-06 12 43	RN			1 × 1	eF, S, lE, * 11·12 sp	LBN 996
NGC 2185	06 11 00.4	-06 13 36	RN			1 × 1	* 11 and 4 S st in vF, L neb	LBN 997, part of N 2185
NGC 2237	06 30 54.6	+05 02 52	EN			80 × 50	pB, vvL, dif (? = 5361)	w part of Rosette nebula
NGC 2238	06 30 40.3	+05 00 47	EN	6.0		80 × 60	S * in nebulosity	LBN 948, knot in Rosette nebula
NGC 2245	06 32 41.2	+10 09 24	RN			5 × 4	pL, com, mbN sf alm , 7·8 nf	LBN 904
NGC 2246	06 32 33.7	+05 07 42	EN				eeF, L, irrR, e diffic	LBN 948, part of Rosette nebula
NGC 2247	06 33 05.1	+10 19 18	RN			6 × 6	Neb * in eF, eL neby, nf IV 3	LBN 901
NGC 2261	06 39 09.5	+08 44 40	EN+RN		9.0	3 × 1	B, vmE 330°, N com = * 11	LBN 920, Hubble's variable nebula
NGC 2282	06 46 51.2	+01 18 54	RN			3 × 3	* 10 in F, R neby	IC 2172, CED 87, assoc. w OCL 535
NGC 2313	06 58 02.8	-07 56 42	EN				F, vS, R	LDN 1653
NGC 2316	06 59 40.8	-07 46 38	RN+EN			4 × 3	pF, S, R, r, S st inv	NGC 2317, LBN 1021, part of one neb
IC 446	06 31 06.0	+10 27 35	RN+*			5 × 4	Neb * 10m	IC 2167, LBN 898, CED 77
IC 447	06 31 04.0	+09 52 00	RN			25 × 20	vF, eeL, dif	IC 2169, LBN 903
IC 448	06 32 45.0	+07 23 18	RN			15 × 10	Neby, np * 5 mag	LBN 930, DG 107
IC 466	07 08 38.9	-04 19 02	EN			1 × 1	* 11.5 in vF neb	CED 92, Sh2-288
IC 2177	07 04 25.3	-10 27 13	EN			20 × 20	pB, eL, iR, v dif	LBN 1027, vdB 93, Sh2-292, Be star
Open Clusters
Name	RA	Dec	Type	bMag	vMag	Dim	Dreyer Description	Identification, Remarks
NGC 2215	06 20 49.2	-07 17 02	II2p		8.4	8	Cl, cL, pRi, pC, st 11…15	OCL 550
NGC 2219	06 23 44.3	-04 40 36	OCL			10	Cl, P, vlC, st 6, 11…12
NGC 2225	06 26 37.5	-09 38 32	OCL			40	Cl, P, lCM, st 12…15	NGC 2226
NGC 2232	06 27 15.0	-04 45 30	IV3p		4.2	45	B * (10 Monoc) + CL	OCL 545
NGC 2236	06 29 39.6	+06 49 51	III2p		8.5	8	Cl, pRi, pC, st 10, 12…15	OCL 501
NGC 2244	06 32 19.0	+04 51 24	II3p	5.3	4.8	24	Cl, beautiful, st sc (12 Monoc)	NGC 2239, OCL 515, in Rosette nebula
NGC 2250	06 33 49.8	-05 05 04	IV2p		8.9	10	Cl, pRi, lC, iF, st 8, 12…14	OCL 547, *Grp ?
NGC 2251	06 34 38.4	+08 21 59	III2p		7.3	10	Cl, vL, E, Ri, lC	OCL 499
NGC 2252	06 34 19.8	+05 19 22	IV2p	7.7		18	Cl, vL, pRi, lC, st S	OCL 514
NGC 2254	06 35 46.6	+07 40 15	I2p		9.1	6	Cl, S, pC, iF, st 11…13	OCL 500
NGC 2259	06 38 33.3	+10 52 57	II2p		10.8	3.5	Cl, cRi, eC, iF, st eS	OCL 492
NGC 2260	06 38 03.0	-01 28 20	OCL			20	Cl, vL, P, vlC, st L & S
NGC 2262	06 39 38.7	+01 08 30	I2p		11.3	4	Cl, vC, iR, bM, st eS	OCL 531
NGC 2264	06 40 58.2	+09 53 44	IV3pn		4.1	40	15 Monoc, Cl, **, ? Neb	OCL 495, LBN 911, Christmas Tree cluster
NGC 2269	06 43 17.0	+04 37 28	II2p		10.0	3	Cl, vmC, not Ri, st vS	OCL 524
NGC 2270	06 43 57.7	+03 28 45	OCL				Cl, lC, not Ri
NGC 2286	06 47 40.1	-03 08 52	IV3m		7.5	15	Cl, L, C, ab 100 st 9…15	OCL 548
NGC 2301	06 51 45.2	+00 27 33	I3m		6.0	15	Cl, Ri, L, iF, st L & S	OCL 540
NGC 2302	06 51 56.6	-07 05 04	II2p	9.1	8.9	2.5	Cl, L, P, lC	NGC 2299, OCL 554
NGC 2306	06 54 29.5	-07 11 55	OCL				Cl, P, vlC	* cloud?
NGC 2309	06 56 03.6	-07 10 28	II2m		10.5	5	Cl, pL, pRi, mC, st 13	OCL 557
NGC 2311	06 57 47.5	-04 36 41	III2p		9.6	7	Cl, lC, not Ri	OCL 553
NGC 2323	07 02 47.8	-08 22 33	II3m		5.9	15	! Cl, vL, Ri, pC, E, st 12…16	M 50, OCL 559
NGC 2324	07 04 07.9	+01 02 41	II2r		8.4	8	Cl, L, Ri, cC, st 12…16	OCL 542
NGC 2335	07 06 49.4	-10 01 43	III3m		7.2	7	Cl, L, lC	OCL 562
NGC 2338	07 07 43.0	-05 43 00	OCL				Cl, vlC	*Grp ?
NGC 2343	07 08 06.7	-10 37 00	III3p		6.7	6	Cl, cL, P, lC	OCL 565
NGC 2349	07 10 48.1	-08 35 34	OCL				Cl, cL, P, cC
NGC 2353	07 14 30.3	-10 15 57	II2p		7.1	18	Cl, L, lC, one vB *	OCL 567
NGC 2364	07 20 46.4	-07 32 58	OCL				Cl, pC, st pL, bifid
NGC 2368	07 21 02.2	-10 22 28	IV2p		11.8	3	Cl, S, pRi, st 15	OCL 571
NGC 2506	08 00 01.7	-10 46 11	I2r		7.6	12	Cl, pL, vRi, C, st 11…20	OCL 593
Galaxies
Name	RA	Dec	Type	bMag	vMag	Dim	Dreyer Description	Identification, Remarks
NGC 2377	07 24 56.7	-09 39 38	Sc	13.5	12.7	1.7 × 1.3	eF, vS * inv, * 11 s	UGCA 132, 3C 178, IRAS 07225-0933, CGMW 1-839
NGC 2494	07 59 07.2	-00 38 15	SB0-a	14.0	13.1	0.9 × 0.7	F, S, lE	IC 487, UGC 4141, MCG 0-21-1, CGCG 3-2, IRAS 07565-0030

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 ^[141]
PNG	RA J2000.0	Dec J2000.0	Main ID	PK	IRAS	Discoverer	Identities	oDiam ["]	rDiam ["]	Dist [kpc]	Rvel [km/s]	ExpVel [km/s]	C* Name	C* Mag	C* SP Type
PN G201.7+02.5	06 39 56	+11 06 30	K 4-48		06371+1109	KOHOUTEK 1969		0.	2.2
PN G204.1+04.7	06 52 30	+9 57 48	K 2- 2	204+04.1		KOHOUTEK 1963	ARO 128	415.			+28.0	10. (O-III)	AG82 69	U: 12.8, B: 14.3, V: 15.0
PN G204.8-03.5	06 23 55	+5 30 12	K 3-72			KOHOUTEK 1969		10.5				13. (O-III), 16. (N-II)
PN G210.0+03.9	07 00 28	+4 20 44	We 2- 34			WEINBERGER 1977		230.
PN G210.3+01.9	06 53 34	+3 08 24	M 1- 8	210+01.1		MINKOWSKI 1946	ARO 129, VV 31, VV' 49	18.			+52.0 ± 25.0	11.0 (O-III)		V: 21.38
PN G211.2-03.5	06 35 45	+0 00 41	M 1- 6	211-03.1	06331-0003	MINKOWSKI 1946	ARO 126, Sa 3- 1, VV 29, VV' 45	< 5.	2.9					B: 16.76, V: 15.84
PN G212.0+04.3	07 05 19	+2 46 59	M 1- 9	212+04.1	07026+0251	MINKOWSKI 1946	ARO 131, VV 32, VV' 53	< 12.	2.3		+136.0 ± 10.1	7. (O-III), 19.0 (N-II)		B: 15.7, V: 15.6
PN G215.6+03.6	07 09 24	+0 38 31	NGC 2346	215+03.1	07068-0043	MINKOWSKI 1946	ARO 80, M 1-10, Sa 2- 5, VV 33, VV' 54	52.		0.64	+20.0 ± 3.0	8.0 (O-III), 12.5 (N-II)	AG -00 965, AG82 74, CSI -00 -7068 0, HD 293373, V651 Mon	B: 11.78, V: 11.47	? + A2 V
PN G216.0-00.2	06 56 14	-2 53 08	A 18	216-00.1		ABELL 1955	A55 13, ARO 224, VV' 50	73.						U: 20.46, B: 21.36, V: 20.90
PN G216.3-04.4	06 41 34	-5 02 40	We 1- 5			WEINBERGER 1977		15.					AG82 66	B: 19.7, V: 19.1
PN G217.4+02.0	07 06 48	-3 04 43	St 3-1		07043-0300	STEPHENSON 1978		15.
PN G218.9-10.7	06 23 37	-10 13 23	HDW 5			HARTL et al 1983	HaWe 7	94.						B: 16.55, V: 16.29	Hg O(H)
PN G221.7+05.3	07 26 34	-5 21 54	M 3- 3	221+05.1		MINKOWSKI 1948	ARO 236, Sa 2- 8, VV' 62, Y-C 38	12.2			+95.0 ± 25.0	10.0 (O-III)
PN G224.3+15.3	08 06 45	-2 52 43	K 1-13	224+15.1		KOHOUTEK 1963	A 25, ARO 246	165.			+16.0	22. (O-III)	AG82 97, CSI -02 -08042, UBV 7761	U: 17.65, B: 18.80, V: 18.94
PN G224.9+01.0	07 17 26	-10 10 40	We 1- 6			WEINBERGER 1977		62.					AG82 78	B: 16.8	Hg O(H)
PN G226.7+05.6	07 37 19	-9 38 48	M 1-16	226+05.1	07349-0932	MINKOWSKI 1946	ARO 239, Sa 2-11, VV 41, VV' 66	3.	3.6		+49.0 ± 25.0	10. (O-III)	AG82 85	B: >17.9, V: 16.9

7	«Der grosse Kosmos-Himmelsführer» von Ian Ridpath und Wil Tirion; Kosmos Verlag; ISBN 3-440-05787-9
9	«Drehbare Sternkarte SIRIUS» von H. Suter-Haug; Hallwag-Verlag, Bern
15	«Hartung's Astronomical Objects for Southern Telescopes» by David Malin and David J. Frew; Melbourne University Press 1995; ISBN 0-522-84553-3
19	«Prodromus Astronomiae» Johannes Hevelius, 1690; DOI:10.3931/e-rara-456
21	«Taschenatlas der Sternbilder» von Josef Klepesta und Antonin Rükl; Verlag Werner Dausien; ISBN 3-7684-2384-0
141	Strasbourg-ESO Catalogue of Galactic Planetary Nebulae; A. Acker, F. Ochsenbein, B. Stenholm, R. Tylenda, J. Marcout, C. Schohn; European Southern Observatory; ISBN 3-923524-41-2 (1992); Bibcode:1992secg.book.....A; cdsarc.u-strasbg.fr/viz-bin/cat/V/84
150	IAU: The Constellations, 11. Oktober 2020; iau.org/public/themes/constellations
154	Yale Bright Star Catalog, 15. Oktober 2020; tdc-www.harvard.edu/catalogs/bsc5.html
277	«Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)