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 Ascension05h 55m 52s … 08h 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+Historic NGC/IC, Version 22/9, © Dr. Wolfgang Steinicke [277]
Planetary Nebulae
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 234607 09 22.5-00 48 22PN11.811.60.87* 10 nff with S, vF, nebPK 215+3.1, CS=11.2
Galactic Nebulae
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 214906 03 30.7-09 43 50RN3 × 2F, * 12 invvdB 66
NGC 217006 07 31.3-06 23 53RN2 × 2* 9 in vF, pL neb, E 170°LBN 994
NGC 218206 09 30.9-06 19 35RN2 × 2pB **, L * neb, E 90° ±LBN 998
NGC 218306 10 46.9-06 12 43RN1 × 1eF, S, lE, * 11·12 spLBN 996
NGC 218506 11 00.4-06 13 36RN1 × 1* 11 and 4 S st in vF, L nebLBN 997, part of N 2185
NGC 223706 30 54.6+05 02 52EN80 × 50pB, vvL, dif (? = 5361)w part of Rosette nebula
NGC 223806 30 40.3+05 00 47EN6.080 × 60S * in nebulosityLBN 948, knot in Rosette nebula
NGC 224506 32 41.2+10 09 24RN5 × 4pL, com, mbN sf alm *, * 7·8 nfLBN 904
NGC 224606 32 33.7+05 07 42ENeeF, L, irrR, e difficLBN 948, part of Rosette nebula
NGC 224706 33 05.1+10 19 18RN6 × 6Neb * in eF, eL neby, nf IV 3LBN 901
NGC 226106 39 09.5+08 44 40EN+RN9.03 × 1B, vmE 330°, N com = * 11LBN 920, Hubble's variable nebula
NGC 228206 46 51.2+01 18 54RN3 × 3* 10 in F, R nebyIC 2172, CED 87, assoc. w OCL 535
NGC 231306 58 02.8-07 56 42ENF, vS, RLDN 1653
NGC 231606 59 40.8-07 46 38RN+EN4 × 3pF, S, R, r, S st invNGC 2317, LBN 1021, part of one neb
IC 44606 31 06.0+10 27 35RN+*5 × 4Neb * 10mIC 2167, LBN 898, CED 77
IC 44706 31 04.0+09 52 00RN25 × 20vF, eeL, difIC 2169, LBN 903
IC 44806 32 45.0+07 23 18RN15 × 10Neby, np * 5 magLBN 930, DG 107
IC 46607 08 38.9-04 19 02EN1 × 1* 11.5 in vF nebCED 92, Sh2-288
IC 217707 04 25.3-10 27 13EN20 × 20pB, eL, iR, v difLBN 1027, vdB 93, Sh2-292, Be star
Open Clusters
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 221506 20 49.2-07 17 02II2p8.48Cl, cL, pRi, pC, st 11…15OCL 550
NGC 221906 23 44.3-04 40 36OCL10Cl, P, vlC, st 6, 11…12
NGC 222506 26 37.5-09 38 32OCL40Cl, P, lCM, st 12…15NGC 2226
NGC 223206 27 15.0-04 45 30IV3p4.245B * (10 Monoc) + CLOCL 545
NGC 223606 29 39.6+06 49 51III2p8.58Cl, pRi, pC, st 10, 12…15OCL 501
NGC 224406 32 19.0+04 51 24II3p5.34.824Cl, beautiful, st sc (12 Monoc)NGC 2239, OCL 515, in Rosette nebula
NGC 225006 33 49.8-05 05 04IV2p8.910Cl, pRi, lC, iF, st 8, 12…14OCL 547, *Grp ?
NGC 225106 34 38.4+08 21 59III2p7.310Cl, vL, E, Ri, lCOCL 499
NGC 225206 34 19.8+05 19 22IV2p7.718Cl, vL, pRi, lC, st SOCL 514
NGC 225406 35 46.6+07 40 15I2p9.16Cl, S, pC, iF, st 11…13OCL 500
NGC 225906 38 33.3+10 52 57II2p10.83.5Cl, cRi, eC, iF, st eSOCL 492
NGC 226006 38 03.0-01 28 20OCL20Cl, vL, P, vlC, st L & S
NGC 226206 39 38.7+01 08 30I2p11.34Cl, vC, iR, bM, st eSOCL 531
NGC 226406 40 58.2+09 53 44IV3pn4.14015 Monoc, Cl, **, ? NebOCL 495, LBN 911, Christmas Tree cluster
NGC 226906 43 17.0+04 37 28II2p10.03Cl, vmC, not Ri, st vSOCL 524
NGC 227006 43 57.7+03 28 45OCLCl, lC, not Ri
NGC 228606 47 40.1-03 08 52IV3m7.515Cl, L, C, ab 100 st 9…15OCL 548
NGC 230106 51 45.2+00 27 33I3m6.015Cl, Ri, L, iF, st L & SOCL 540
NGC 230206 51 56.6-07 05 04II2p9.18.92.5Cl, L, P, lCNGC 2299, OCL 554
NGC 230606 54 29.5-07 11 55OCLCl, P, vlC* cloud?
NGC 230906 56 03.6-07 10 28II2m10.55Cl, pL, pRi, mC, st 13OCL 557
NGC 231106 57 47.5-04 36 41III2p9.67Cl, lC, not RiOCL 553
NGC 232307 02 47.8-08 22 33II3m5.915! Cl, vL, Ri, pC, E, st 12…16M 50, OCL 559
NGC 232407 04 07.9+01 02 41II2r8.48Cl, L, Ri, cC, st 12…16OCL 542
NGC 233507 06 49.4-10 01 43III3m7.27Cl, L, lCOCL 562
NGC 233807 07 43.0-05 43 00OCLCl, vlC*Grp ?
NGC 234307 08 06.7-10 37 00III3p6.76Cl, cL, P, lCOCL 565
NGC 234907 10 48.1-08 35 34OCLCl, cL, P, cC
NGC 235307 14 30.3-10 15 57II2p7.118Cl, L, lC, one vB *OCL 567
NGC 236407 20 46.4-07 32 58OCLCl, pC, st pL, bifid
NGC 236807 21 02.2-10 22 28IV2p11.83Cl, S, pRi, st 15OCL 571
NGC 250608 00 01.7-10 46 11I2r7.612Cl, pL, vRi, C, st 11…20OCL 593
Galaxies
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 237707 24 56.7-09 39 38Sc13.512.71.7 × 1.3eF, vS * inv, * 11 sUGCA 132, 3C 178, IRAS 07225-0933, CGMW 1-839
NGC 249407 59 07.2-00 38 15SB0-a14.013.10.9 × 0.7F, S, lEIC 487, UGC 4141, MCG 0-21-1, CGCG 3-2, IRAS 07565-0030

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)