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Serpens Constellation

Serpens (Pronounciation:Sir-pens, Abbrev:Ser, Latin:Serpentis) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Serpens takes up 636.928 sq. degrees of the night sky which equates to 1.54% of the night sky. The constellation gets its name as it name means The Serpents . The constellation is one of the original constellations that was devised by the Ancient Greco-Egyptian astronomer Ptolemy who lived between 90 A.D. and 168 A.D.

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

The brightest star in Serpens is Unukalhai. There are 6 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site.

Serpens Star and Deep Space Object Count

The number of stars that have been catalogued as part of the Hipparcos Star Catalogue from Serpens is 1539. The number of stars that are of magnitude 6.0 or lower in the constellation is 65. The number of stars in the constellation that make up the outline is 12.

There are 2 deep space objects that were identified by Charles Messier in this constellation. There are no non-Messier deep space objects in this constellation that are covered at present on this site.

Stars of Interest

The nearest star to Earth is HIP 88574 which is roughly about 25.31 Light Years from the Earth. The nearest star to the Earth with an exoplanet is HD 168443 which is about 122.07 Light Years. The furthest star that can be located in the constellation is HIP 90910 which is located about 326163 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 Serpens with the naked eye is Tau6 Serpentis. The dim star has an apparent magnitude of 6. 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.

Legend of the Constellation

The Serpents although two separate constellations are usually referred to as one. The constellation Ophiuchus is sandwiched in between them. They are probably serpents that Ophiuchus cured people with.

Meteor Showers

There are 12 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
Kappa Serpentids1 Apr- 7 Apr05-AprKappa Serpentis

Serpens Facts

Is a Zodiac Sign No
Brightest StarUnukalhai
Area636.928 sq. deg.
Percentage of Night Sky1.54%
Size Position23rd
Hemisphere Equatorial
Site Exoplanet Count6
Meteor Shower Count12
Nearest StarHIP 88574
Nearest Star with Exoplanet(s)HD 168443
Dimmest StarTau6 Serpentis
Furthest StarHIP 90910
Bright Star Count65
Hipparcos Star Count1539
Main Star Count12
Messier Deep Space Object Count2
*Non-Messier Deep Space Object Count0
Bordering / Neighbouring / Surrounding ConstellationsCorona Borealis

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

Serpens Constellation Map

Serpens Constellation Star Map

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

List of Stars with Exoplanets in Serpens

StarDistance (Lt. Yrs.)Exoplanet CountDeclinationRight Ascension
HD 136118 151.921-01d 35` 32.815h 18m 55.54
HD 142245357.241+15d 25` 50.715h 52m 56.31
HD 168443122.072-09d 35` 42.618h 20m 03.99
HD 168746139.391-11d 55` 21.118h 21m 49.80
HD 175541414.441+04d 15` 56.018h 55m 40.89

List of Named Stars in Serpens 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
10 G. Ser Cap114.32-02d 24` 46.515h 20m 47.17
10 G. Ser Cau384.17-10d 55` 34.517h 38m 09.51
10 Serpentis129.64+01d 50` 31.815h 28m 38.29
12 G. Ser Cau143.49-13d 30` 30.317h 43m 48.45
13 G. Ser Cau599.56-14d 43` 32.817h 47m 36.79
14 G. Ser Cau300.06-10d 53` 58.217h 53m 03.51
14 Serpentis474.07-00d 33` 41.315h 36m 33.72
16 G. Ser Cau241.25-15d 48` 44.517h 56m 19.04
16 Serpentis231.16+10d 00` 37.615h 36m 29.55
19 G. Ser Cau517.72-08d 19` 26.118h 06m 07.40
2 G. Ser Cau155.84-10d 41` 46.917h 20m 52.60
20 G. Ser Cau119.91-04d 45` 04.218h 06m 15.11
21 G. Ser Cau701.43-00d 26` 46.018h 06m 07.44
22 G. Ser Cap369.80+05d 26` 50.415h 45m 23.47
23 G. Ser Cap633.33+00d 53` 27.815h 45m 39.50
24 G. Ser Cau825.73-13d 56` 03.918h 09m 43.37
27 G. Ser Cau439.57-03d 37` 04.718h 15m 57.93
28 G. Ser Cau337.29-03d 00` 24.318h 16m 53.09
29 G. Ser Cau432.58-09d 45` 30.518h 17m 24.16
29 Serpentis758.52+15d 31` 36.115h 46m 24.00
3 Herculis244.87+04d 25` 37.816h 00m 51.16
3 Serpentis373.18+04d 56` 21.715h 15m 11.37
32 G. Ser Cau521.03-15d 49` 53.818h 20m 08.77
36 G. Ser Cau201.96-03d 34` 58.918h 24m 03.60
37 G. Ser Cau435.47-01d 34` 45.918h 24m 57.21
38 G. Ser Cap433.73+08d 05` 46.516h 05m 37.93
39 Serpentis56.59+13d 11` 52.815h 53m 12.19
4 G. Ser Cap1006.68+06d 27` 53.615h 15m 53.57
4 G. Ser Cau444.36-15d 51` 12.017h 27m 09.89
4 Serpentis150.51+00d 22` 19.615h 15m 49.14
40 Serpentis257.23+08d 34` 49.215h 54m 40.27
41 G. Ser Cap396.31+03d 27` 16.016h 08m 58.90
42 G. Ser Cap92.35+06d 22` 49.816h 09m 11.06
43 G. Ser Cap478.95-03d 28` 00.216h 09m 50.53
43 Serpentis360.80+04d 59` 12.516h 03m 45.71
44 G. Ser Cau707.51+06d 11` 39.018h 27m 58.77
45 G. Ser Cap331.13-01d 28` 30.516h 13m 38.63
45 Serpentis322.93+09d 53` 30.316h 07m 37.55
46 Serpentis373.61+10d 04` 49.816h 08m 05.73
47 Ophiuchi141.87-12d 30` 44.417h 27m 02.12
47 Serpentis807.34+08d 32` 03.616h 08m 28.08
48 G. Ser Cap771.07+01d 29` 48.216h 17m 43.37
5 G. Ser Cap581.40+00d 56` 22.015h 18m 22.62
5 Serpentis82.78+01d 46` 00.015h 19m 18.58
6 G. Ser Cap726.42-00d 27` 40.515h 18m 26.13
6 G. Ser Cau402.17-11d 14` 31.217h 34m 46.35
6 Serpentis239.30+00d 42` 56.115h 21m 02.02
60 G. Ser Cau156.43-03d 11` 37.418h 38m 23.80
61 Serpentis614.24-01d 00` 10.718h 31m 56.99
63 G. Ser Cau1120.84+05d 15` 51.418h 39m 36.88
64 Serpentis1136.46+02d 32` 07.418h 57m 16.59
66 G. Ser Cau615.40+05d 30` 00.418h 45m 28.36
67 G. Ser Cau797.47+04d 14` 29.018h 48m 02.67
7 Serpentis448.64+12d 34` 03.115h 22m 23.24
73 G. Ser Cau510.43+02d 28` 16.318h 56m 25.60
8 Serpentis166.75-01d 01` 20.315h 23m 43.67
9 G. Ser Cau1545.80-15d 34` 15.717h 37m 36.20
A1 Serpentis280.21-01d 11` 10.715h 32m 57.95
A2 Serpentis449.88-01d 48` 14.815h 46m 05.65
Alya169.44+04d 12` 07.418h 56m 14.61
B Serpentis162.27-03d 05` 25.515h 51m 15.65
Beta Serpentis155.09+15d 25` 18.915h 46m 11.21
C Serpentis229.69-01d 59` 06.818h 29m 40.96
Chi Serpentis219.79+12d 50` 51.115h 41m 47.39
D Serpentis469.30+00d 11` 46.118h 27m 12.51
Delta Serpentis228.09+10d 32` 19.915h 34m 48.19
E Serpentis523.54-00d 18` 33.918h 37m 35.95
Eta Serpentis60.48-02d 53` 49.618h 21m 18.92
FL Serpentis723.20+18d 58` 33.615h 12m 04.27
FQ Serpentis662.93+08d 36` 47.716h 08m 36.53
FR Serpentis359.61+04d 56` 09.818h 35m 36.48
Gamma Serpentis36.71+15d 39` 53.015h 56m 26.99
Gliese 71063.80-01d 56` 19.018h 19m 50.84
Iota Serpentis190.07+19d 40` 13.815h 41m 33.09
Kappa Serpentis381.92+18d 08` 30.415h 48m 44.41
Lambda Serpentis39.54+07d 21` 11.715h 46m 26.75
Mu Serpentis169.61-03d 25` 48.515h 49m 37.27
MV Serpentis991.38+03d 39` 34.518h 32m 06.88
Nu Serpentis203.22-12d 50` 48.817h 20m 49.64
Nulla Pambu70.45+04d 28` 39.315h 50m 48.89
NW Serpentis1058.97+05d 26` 08.718h 21m 28.40
Omega Serpentis273.40+02d 11` 47.815h 50m 17.53
Omicron Serpentis173.21-12d 52` 30.617h 41m 24.92
Phi Serpentis241.25+14d 24` 51.415h 57m 14.64
Pi Serpentis179.01+22d 48` 15.816h 02m 17.69
Psi Serpentis47.81+02d 30` 55.915h 44m 01.85
QY Serpentis510.43+20d 18` 39.115h 54m 34.66
Rho Serpentis374.90+20d 58` 40.415h 51m 15.94
Sigma Serpentis88.95+01d 01` 44.116h 22m 04.44
Tau1 Serpentis689.56+15d 25` 41.015h 25m 47.41
Tau2 Serpentis469.30+16d 03` 22.115h 32m 09.68
Tau3 Serpentis379.26+17d 39` 20.115h 35m 33.28
Tau4 Serpentis671.12+15d 06` 05.015h 36m 28.19
Tau5 Serpentis169.79+16d 07` 08.815h 36m 29.20
Tau6 Serpentis606.25+16d 01` 28.715h 40m 59.09
Tau7 Serpentis173.12+18d 27` 50.015h 41m 54.76
Tau8 Serpentis370.64+17d 15` 51.215h 44m 42.15
Theta1 Serpentis154.65+04d 12` 12.718h 56m 13.16
Unukalhai73.96+06d 25` 31.915h 44m 16.00
Upsilon Serpentis250.13+14d 06` 55.015h 47m 17.35
Xi Serpentis105.28-15d 23` 54.317h 37m 35.23
Zeta Serpentis76.82-03d 41` 24.618h 00m 28.92

Objects of Interest (Galaxies, Nebulas, Supernovas, etc) in Serpens

NameTypeDistanceDeclinationRight Ascension
Eagle NebulaStar Forming Nebula7-13:4718h 18m 8
M5 Globular ClusterGlobular Cluster24.5+02:0515h 18m 6

Serpens Constellation's Star Breakdown

Type Breakdown

KLight Orange Star 3,700 - 5,200k442
FYellow-White 6,000 - 7,500k369
GYellow 5,200 - 6,000k340
AWhite 7,500 - 10,000k214
BBlue-White 10,500 - 30,000k65
MRed Dwarf Star <3,700k55
OBlue Star >33,000k6

Size Breakdown

IIINormal Giant138
VMain Sequence136
IIBright Giant13
IbLess Luminous Supergiant9
IabIntermediate Luminous Supergiant3
IaLuminous Supergiant2
WWolf-Rayet Star1

Breakdown of Carbon Stars by Type

CC-Type Carbon Star2
RR-Type Carbon Star1

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