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Monoceros Constellation

Monoceros (Pronounciation:Mono-sear-os, Abbrev:Mon, Latin:Monocerotis) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Monoceros takes up 481.569 sq. degrees of the night sky which equates to 1.17% of the night sky. The constellation gets its name as it name means The Unicorn . It was not one of the original constellations that had been devised by Ptolemy, instead it was created by Jakob Bartsch years later.

Monoceros is not a member of the Zodiac group of twelve constellations that appear when the Sun sets. Monoceros is an equatorial constellation that can be seen by countries nearest the Equator.

The brightest star in Monoceros is Beta Monocerotis. There are 25 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site. The current largest star so far identified in the constellation of Monoceros is V838 Monocerotis.

Monoceros Star and Deep Space Object Count

The number of stars that have been catalogued as part of the Hipparcos Star Catalogue from Monoceros is 1444. The number of stars that are of magnitude 6.0 or lower in the constellation is 71. The number of stars in the constellation that make up the outline is 8.

There are 1 deep space objects that were identified by Charles Messier in this constellation. There are 2 non-Messier deep space objects that are covered on this site and the list is below.

Stars of Interest

The nearest star to Earth is HIP 30920 which is roughly about 13.46 Light Years from the Earth. The nearest star to the Earth with an exoplanet is HD 52265 which is about 94.46 Light Years. The furthest star that can be located in the constellation is HIP 28535 which is located about 326163.3 Light Years away from the Sun. The furthest figure is derived from either the 1997 or 2007 Hipparcos star catalogue parallax figure and it has been known to produce distances that are wrong.

The dimmest star that can be seen in Monoceros with the naked eye is HD 43319. The dim star has an apparent magnitude of 5.99. The dimmest star that a person is able to see with their naked eye is 6.0 magnitude based on the table in the reference. Ref: University of Michigan

The caveat of these stars are that they are catalogued on this site. If you know of a star that is nearer or further then do let me know in the comments and I'll add it to the site. The stars mentioned are from the Hipparcos catalogue or have been added because of their special status.

This along with Camelopardalis was created by Jakob Bartsch and there is no Greek mythology behind it.

V616 Mon, nearest black hole

The constellation can boast having the location of the nearest black hole so far discovered in our galaxy to us. It is still 2,600 light years away. It is so far as for us to not worry about the effect of it. As we search the skies more, there might well be a closer black hole discovered but until then Monoceros has hold onto the accolade.

Meteor Showers

There are 7 Meteor Showers that occur during the year within this constellation based on information gathered from Adam Mickiewicz University (Poland). The ones listed as the ones I've been able to find a date range for. For others if you have the time, you can visit the AMU site, obtains the SL value then use IMO tables to calculate the date. A lot of the Meteor Showers are weak and you need to do a lot of stargazing to spot them.

NameActivityPeak ActivityClosest Star
Alpha MonocerotidsNov 15 - Nov 25 Nov 21Alpha Monocerotis
MonocerotidsNov 27 - Dec 17 Dec 09Zeta Monocerotis

Monoceros Facts

Is a Zodiac Sign No
Largest StarV838 Monocerotis
Brightest StarBeta Monocerotis
Area481.569 sq. deg.
Percentage of Night Sky1.17%
Size Position35th
Hemisphere Equatorial
Site Exoplanet Count25
Meteor Shower Count7
Nearest StarHIP 30920
Nearest Star with Exoplanet(s)HD 52265
Dimmest StarHD 43319
Furthest StarHIP 28535
Bright Star Count71
Hipparcos Star Count1444
Main Star Count8
Messier Deep Space Object Count1
*Non-Messier Deep Space Object Count2
Bordering / Neighbouring / Surrounding ConstellationsGemini
Canis Major
Canis Minor

*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.

Monoceros Constellation Map

Monoceros Constellation Star Map

The map was generated using Night Vision, an awesome free application by Brian Simpson.

List of Stars with Exoplanets in Monoceros

StarDistance (Lt. Yrs.)Exoplanet CountDeclinationRight Ascension
CoRoT-11-03d 06` 08.0006h 48m 19.00
CoRoT-10100d 44` 46.0019h 24m 15.00
CoRoT-121-01d 17` 47.0006h 43m 04.00
CoRoT-131-05d 05` 11.0006h 50m 53.00
CoRoT-141-05d 32` 10.0006h 53m 42.00
CoRoT-15106d 11` 10.4706h 28m 28.00
CoRoT-18100d 01` 53.0006h 32m 41.00
CoRoT-19100d 10` 14.0006h 28m 08.00
CoRoT-20100d 13` 36.9106h 30m 55.30
CoRoT-21100d 17` 56.8706h 44m 12.59
CoRoT-242-03d 43` 10.0006h 47m 42.00
CoRoT-311-04d 25` 20.0006h 19m 17.00
CoRoT-32109d 15` 27.0006h 40m 47.00
CoRoT-4100d 40` 22.0006h 48m 47.00
CoRoT-5100d 48` 55.0006h 45m 07.00
CoRoT-72-01d 03` 46.0006h 43m 49.00
HD 44219164.481-10d 43` 29.906h 20m 14.28
HD 45652112.051+10d 56` 02.606h 29m 13.07
HD 46375113.571+05d 27` 47.406h 33m 12.56
HD 5226594.462-05d 22` 02.507h 00m 18.10
HD 66428179.111-01d 09` 43.908h 03m 28.71
WISE J0720-08461-08d 46` 51.0007h 20m 03.00

List of Named Stars in Monoceros without Extrasolar Planets

As there's so many stars in the cosmos, not all the stars are listed here. The site has lots of stars not listed so if your star isn't listed and you know the Henry Draper or Hipparcos ID, type https://www.universeguide.com/star/ then followed by the HIPNNNNNN or HDNNNN where NNNNN is the number part of the name. The stars that I do list have either a traditional name, a bayer or other classification name.

StarDistance (Lt. Yrs.)DeclinationRight Ascension
1 Monocerotis294.64-09d 22` 56.105h 59m 01.07
10 Monocerotis1087.21-04d 45` 43.706h 27m 57.57
12 Monocerotis562.35+04d 51` 21.606h 32m 19.23
13 Monocerotis3929.68+07d 19` 58.706h 32m 54.23
14 Monocerotis376.63+07d 34` 21.006h 34m 46.33
16 Monocerotis858.32+08d 35` 13.806h 46m 32.42
17 Monocerotis492.69+08d 02` 14.206h 47m 19.84
18 Monocerotis368.13+02d 24` 43.906h 47m 51.66
19 Monocerotis1217.03-04d 14` 21.307h 02m 54.78
2 Monocerotis286.36-09d 33` 29.305h 59m 04.31
20 Monocerotis202.84-04d 14` 15.507h 10m 13.68
21 Monocerotis284.36-00d 18` 06.907h 11m 23.63
24 Monocerotis451.75-00d 09` 40.707h 15m 19.41
25 Monocerotis220.23-04d 06` 39.707h 37m 16.73
27 Monocerotis274.78-03d 40` 46.507h 59m 44.18
28 Monocerotis449.88-01d 23` 32.708h 01m 13.30
3 Monocerotis784.05-10d 35` 52.606h 01m 50.43
6 Monocerotis1387.93-10d 43` 30.006h 17m 35.13
7 Monocerotis872.09-07d 49` 22.506h 19m 42.80
77 Orionis849.38+00d 17` 57.406h 27m 13.76
78 Orionis692.49-00d 16` 33.606h 27m 15.59
9 Monocerotis937.25-04d 21` 20.306h 27m 00.88
Alpha Monocerotis147.79-09d 33` 03.907h 41m 14.88
AO Monocerotis-04d 37` 24.507h 06m 36.30
AR Monocerotis962.13-05d 15` 35.707h 20m 48.45
AU Monocerotis-01d 22` 32.906h 54m 54.71
AX Monocerotis12080.12+05d 52` 01.206h 30m 32.94
Beta Monocerotis676.69-07d 01` 59.006h 28m 49.07
Delta Monocerotis384.17-00d 29` 34.007h 11m 51.86
Epsilon Monocerotis75.62-10d 41` 10.301h 49m 35.19
Epsilon Monocerotis B73.59-10d 42` 11.901h 49m 23.43
FU Monocerotis2489.80+03d 25` 28.006h 22m 23.85
Gamma Monocerotis497.96-06d 16` 29.006h 14m 51.34
Gliese 28246.35-03d 35` 48.607h 39m 59.29
HR 21421315.17-06d 42` 32.206h 04m 13.50
HR 25178154.08+01d 00` 07.506h 49m 03.66
IM Monocerotis991.38-03d 16` 37.106h 23m 01.47
Plasketts Star+06d 08` 07.406h 37m 24.04
PZ Monocerotis2077.47+01d 13` 08.306h 48m 21.07
Red Rectangle Nebula1436.84-10d 38` 14.506h 19m 58.22
RW Monocerotis737.93+08d 49` 32.206h 34m 45.89
S Monocerotis918.77+09d 53` 44.706h 40m 58.66
SV Monocerotis+06 d 28` 12.606h 21m 26.30
T Monocerotis2695.56+07d 05` 08.606h 25m 13.00
U Monocerotis2218.80-09d 46` 36.807h 30m 47.47
UX Monocerotis5528.19-07d 30` 17.907h 59m 16.38
V Monocerotis1289.18-02d 11` 43.206h 22m 43.58
V505 Monocerotis2174.42+02d 29` 57.406h 45m 49.98
V569 Monocerotis-10d 39` 36.307h 05m 49.64
V614 Monocerotis1545.80-03d 15` 09.107h 01m 01.96
V638 Monocerotis574.23-04d 39` 55.606h 11m 43.72
V644 Monocerotis4868.11-10d 49` 28.106h 57m 09.38
V689 Monocerotis2174.42+01d 36` 48.706h 38m 38.19
V695 Monocerotis2313.22-02d 52` 54.908h 00m 44.14
V721 Monocerotis1456.09-09d 52` 29.106h 23m 35.92
V731 Monocerotis21744.22+04d 57` 24.006h 37m 52.70
V753 Monocerotis605.13-03d 52` 43.107h 10m 57.86
V838 Monocerotis-03d 50` 50.0107h 04m 04.85
V926 Monocerotis1918.61-03d 45` 17.407h 02m 06.73
Zeta Monocerotis1058.97-02d 59` 01.608h 08m 35.66

List of Deep Space Objects (Galaxies, Nebulas, Supernovas, etc) in Monoceros

NameTypeDistanceDeclinationRight Ascension
Cone NebulaDark Nebula2.700+09:2106h 41m 15
M50 Open ClusterOpen Cluster3200-08:2007h 03m 2
Rosette NebulaNebula520004:59:5406h 33h 45

Monoceros Constellation's Star Breakdown

Type Breakdown

AWhite 7,500 - 10,000k367
BBlue-White 10,500 - 30,000k338
KLight Orange Star 3,700 - 5,200k296
FYellow-White 6,000 - 7,500k150
GYellow 5,200 - 6,000k143
MRed Dwarf Star <3,700k44
OBlue Star >33,000k16

Size Breakdown

VMain Sequence176
IIINormal Giant92
IbLess Luminous Supergiant20
IIBright Giant15
IabIntermediate Luminous Supergiant4

Breakdown of Dwarf Stars by Type

sdsd Type SubDwarf Star1

Breakdown of Carbon Stars by Type

CC-Type Carbon Star9
NN-Type Carbon Star5
SS-Type Carbon Star3
RR-Type Carbon Star2

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