Constellation Monoceros (Unicorn)

Monoceros
Monoceros: IAU Constellation Map [150]

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]

Data for constellation Monoceros [150]
IAU NameMonoceros
IAU GenitiveMonocerotis
IAU Abbr.Mon
English NameUnicorn
Season (47° N)October … March
Right Ascension5h 55m 52s … 8h 11m 24s
Declination-11° 22' 08" … 11° 56' 00"
Area482 deg2
Neighbours (N↻)Gem, Ori, Lep, CMa, Pup, Hya, CMi

Deep-Sky Object Descriptions

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 RA [hms] Dec [dms] vMag spType dMag Sep ["]
2107105 59 01.0-09 22 566.12 F2IV
2108205 59 04.3-09 33 305.03 A6IIIm vs
2128306 01 50.4-10 35 534.95 B5III 3.51.9
2227γ506 14 51.3-06 16 293.98 K1.5IIIBa0.3 9.051.4
2255606 17 35.2-10 43 316.75 F0Del Del
2273706 19 42.8-07 49 235.27 B2.5V
2298ε806 23 46.1+04 35 344.44 A5IV 2.212.9
23441006 27 57.6-04 45 445.06 B2V 4.277.2
2356β1106 28 49.0-07 01 584.60 B3Ve v0.57.1
2357β1106 28 49.5-07 02 045.40 B3ne 0.57.1
2358β1106 28 49.5-07 02 045.60 H B3e 0.57.1
23821206 32 19.2+04 51 215.84 K0V
23851306 32 54.2+07 19 594.50 A0Ib
24041406 34 46.4+07 34 216.45 A0V s 4.010.5
24561506 40 58.7+09 53 444.66 O7V((f)) 3.52.9
24941606 46 32.4+08 35 145.93 B2.5V
25031706 47 19.8+08 02 144.77 K4III
25061806 47 51.6+02 24 444.47 K0+IIIaBa0.2
26481907 02 54.8-04 14 214.99 B1V e
27012007 10 13.7-04 14 144.92 K0III 4.9186.2
27072107 11 23.6-00 18 075.45 A8Vn-F3Vn v
2714δ2207 11 51.9-00 29 344.15 A2V 9.232.0
27442407 15 19.3-00 09 416.41 G5III 5.83.8
29272507 37 16.7-04 06 405.13 F6III 5.3121.7
2970α2607 41 14.8-09 33 043.93 K0III
31222707 59 44.1-03 40 474.93 K2III
31412808 01 13.3-01 23 334.68 K4III
3188ζ2908 08 35.6-02 59 024.34 G2Ib 4.966.0

«Revised New General Catalogue and Index Catalogue», Dr. Wolfgang Steinicke, 2021 [277]
NameRADecTypeBmagVmagDimDreyer DescriptionIdentification
NGC 2142 06 01 50.3-10 35 51*5.0* (3 Monoc) inv in pL, F, neb3 Mon
NGC 2149 06 03 30.7-09 43 50RN3.00 × 2.0F, * 12 invvdB 66
NGC 2167 06 06 58.6-06 12 10*6.6Nebulous * 7, am 3 stSAO 132848
NGC 2170 06 07 31.3-06 23 53RN2.00 × 2.0* 9 in vF, pL neb, E 170°LBN 994
NGC 2182 06 09 30.9-06 19 35RN2.00 × 2.0pB **, L * neb, E 90° ±LBN 998
NGC 2183 06 10 46.9-06 12 43RN1.00 × 1.0eF, S, lE, * 11·12 spLBN 996
NGC 2185 06 11 00.4-06 13 36RN1.00 × 1.0* 11 and 4 S st in vF, L nebLBN 997, part of N 2185
NGC 2215 06 20 49.2-07 17 02OCL (II2p)8.48.00Cl, cL, pRi, pC, st 11…15OCL 550
NGC 2219 06 23 44.3-04 40 36OCL10.00Cl, P, vlC, st 6, 11…12
NGC 2225 06 26 37.5-09 38 32OCL40.00Cl, P, lCM, st 12…15NGC 2226
NGC 2226 06 26 37.5-09 38 32OCL40.00S, v diffic, * 10 close sNGC 2225
NGC 2232 06 27 15.0-04 45 30OCL (IV3p)4.245.00B * (10 Monoc) + CLOCL 545
NGC 2236 06 29 39.6+06 49 51OCL (III2p)8.58.00Cl, pRi, pC, st 10, 12…15OCL 501
NGC 2237 06 30 54.6+05 02 52EN80.00 × 50.0pB, vvL, dif (? = 5361)w part of Rosette nebula
NGC 2238 06 30 40.3+05 00 47EN6.080.00 × 60.0S * in nebulosityLBN 948, knot in Rosette nebula
NGC 2239 06 32 19.0+04 51 24II3p5.34.824.00* 8 in L, P, B ClNGC 2244, OCL 515, in Rosette nebula
NGC 2244 06 32 19.0+04 51 24OCL (II3p)5.34.824.00Cl, beautiful, st sc (12 Monoc)NGC 2239, OCL 515, in Rosette nebula
NGC 2245 06 32 41.2+10 09 24RN5.00 × 4.0pL, com, mbN sf alm *, * 7·8 nfLBN 904
NGC 2246 06 32 33.7+05 07 42ENeeF, L, irrR, e difficLBN 948, part of Rosette nebula
NGC 2247 06 33 05.1+10 19 18RN6.00 × 6.0Neb * in eF, eL neby, nf IV 3LBN 901
NGC 2250 06 33 49.8-05 05 04OCL (IV2p)8.910.00Cl, pRi, lC, iF, st 8, 12…14OCL 547, *Grp ?
NGC 2251 06 34 38.4+08 21 59OCL (III2p)7.310.00Cl, vL, E, Ri, lCOCL 499
NGC 2252 06 34 19.8+05 19 22OCL (IV2p)7.718.00Cl, vL, pRi, lC, st SOCL 514
NGC 2254 06 35 46.6+07 40 15OCL (I2p)9.16.00Cl, S, pC, iF, st 11…13OCL 500
NGC 2259 06 38 33.3+10 52 57OCL (II2p)10.83.50Cl, cRi, eC, iF, st eSOCL 492
NGC 2260 06 38 03.0-01 28 20OCL20.00Cl, vL, P, vlC, st L & S
NGC 2261 06 39 09.5+08 44 40EN+RN9.03.00 × 1.0B, vmE 330°, N com = * 11LBN 920, Hubble's variable nebula
NGC 2262 06 39 38.7+01 08 30OCL (I2p)11.34.00Cl, vC, iR, bM, st eSOCL 531
NGC 2264 06 40 58.2+09 53 44OCL (IV3pn)4.140.0015 Monoc, Cl, **, ? NebOCL 495, LBN 911, Christmas Tree cluster
NGC 2269 06 43 17.0+04 37 28OCL (II2p)10.03.00Cl, vmC, not Ri, st vSOCL 524
NGC 2270 06 43 57.7+03 28 45OCLCl, lC, not Ri
NGC 2282 06 46 51.2+01 18 54RN3.00 × 3.0* 10 in F, R nebyIC 2172, CED 87, assoc. w OCL 535
NGC 2286 06 47 40.1-03 08 52OCL (IV3m)7.515.00Cl, L, C, ab 100 st 9…15OCL 548
NGC 2299 06 51 56.6-07 05 04II2p9.18.92.50Cl of 30 or 40 stNGC 2302, OCL 554
NGC 2301 06 51 45.2+00 27 33OCL (I3m)6.015.00Cl, Ri, L, iF, st L & SOCL 540
NGC 2302 06 51 56.6-07 05 04OCL (II2p)9.18.92.50Cl, L, P, lCNGC 2299, OCL 554
NGC 2306 06 54 29.5-07 11 55OCLCl, P, vlC* cloud?
NGC 2309 06 56 03.6-07 10 28OCL (II2m)10.55.00Cl, pL, pRi, mC, st 13OCL 557
NGC 2311 06 57 47.5-04 36 41OCL (III2p)9.67.00Cl, lC, not RiOCL 553
NGC 2312 06 58 47.0+10 17 44*Grp5.00 × 2.5Cl, P
NGC 2313 06 58 02.8-07 56 42ENF, vS, RLDN 1653
NGC 2316 06 59 40.8-07 46 38RN+EN4.00 × 3.0pF, S, R, r, S st invNGC 2317, LBN 1021, part of one neb
NGC 2317 06 59 40.8-07 46 38RN+EN4.00 × 3.0Makes a close D neb with h 421NGC 2316, LBN 1021, part of one neb
NGC 2319 07 00 32.2+03 02 34*Grp16.00Cl of v sc st, st 8, 9…
NGC 2323 07 02 47.8-08 22 33OCL (II3m)5.915.00! Cl, vL, Ri, pC, E, st 12…16M 50, OCL 559
NGC 2324 07 04 07.9+01 02 41OCL (II2r)8.48.00Cl, L, Ri, cC, st 12…16OCL 542
NGC 2335 07 06 49.4-10 01 43OCL (III3m)7.27.00Cl, L, lCOCL 562
NGC 2338 07 07 43.0-05 43 00OCLCl, vlC*Grp ?
NGC 2343 07 08 06.7-10 37 00OCL (III3p)6.76.00Cl, cL, P, lCOCL 565
NGC 2346 07 09 22.5-00 48 22PN11.811.60.87* 10 nff with S, vF, nebPK 215+3.1, CS=11.2
NGC 2349 07 10 48.1-08 35 34OCLCl, cL, P, cC
NGC 2351 07 13 30.0-10 28 58*GrpCl, lC, ** taken
NGC 2353 07 14 30.3-10 15 57OCL (II2p)7.118.00Cl, L, lC, one vB *OCL 567
NGC 2364 07 20 46.4-07 32 58OCLCl, pC, st pL, bifid
NGC 2368 07 21 02.2-10 22 28OCL (IV2p)11.83.00Cl, S, pRi, st 15OCL 571
NGC 2377 07 24 56.7-09 39 38Gx (Sc)13.512.71.70 × 1.3eF, vS * inv, * 11 sUGCA 132, 3C 178, IRAS 07225-0933, CGMW 1-839
NGC 2494 07 59 07.2-00 38 15Gx (SB0-a)14.013.10.90 × 0.7F, S, lEIC 487, UGC 4141, MCG 0-21-1, CGCG 3-2, IRAS 07565-0030
NGC 2506 08 00 01.7-10 46 11OCL (I2r)7.612.00Cl, pL, vRi, C, st 11…20OCL 593
IC 446 06 31 06.0+10 27 35RN+*5.00 × 4.0Neb * 10mIC 2167, LBN 898, CED 77
IC 447 06 31 04.0+09 52 00RN25.00 × 20.0vF, eeL, difIC 2169, LBN 903
IC 448 06 32 45.0+07 23 18RN15.00 × 10.0Neby, np * 5 magLBN 930, DG 107
IC 466 07 08 38.9-04 19 02EN1.00 × 1.0* 11.5 in vF nebCED 92, Sh2-288
IC 487 07 59 07.2-00 38 15SB0-a14.013.10.90 × 0.7eeF, vS, RNGC 2494, UGC 4141, MCG 0-21-1, CGCG 3-2, IRAS 07565-0030
IC 2167 06 31 06.0+10 27 35RN+*5.00 × 4.0* 9.5 in F, L nebIC 446, LBN 898, CED 77
IC 2169 06 31 04.0+09 52 00RN25.00 × 20.0F, L, dif, sev st 9-10 invIC 447, LBN 903
IC 2172 06 46 51.2+01 18 54RN3.00 × 3.0neb *NGC 2282, CED 87, assoc. w OCL 535
IC 2177 07 04 25.3-10 27 13EN20.00 × 20.0pB, eL, iR, v difLBN 1027, vdB 93, Sh2-292, Be star

References

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
21«Taschenatlas der Sternbilder» von Josef Klepesta und Antonin Rükl; Verlag Werner Dausien; ISBN 3-7684-2384-0
150IAU: The Constellations, 11. Oktober 2020; iau.org/public/themes/constellations
154Yale 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)