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Delphinus Constellation

Delphinus (Pronounciation:Del-fine-us, Abbrev:Del, Latin:Delphini) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Delphinus takes up 188.549 sq. degrees of the night sky which equates to 0.46% of the night sky. The constellation gets its name as it name means The Dolphin . 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.

Delphinus is not a member of the Zodiac group of twelve constellations that appear when the Sun sets. Delphinus is a northern hemispheric constellation which means it can't be seen easily or at all from the southern hemisphere.

The brightest star in Delphinus is Rotanev. There are 2 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site.

Delphinus Star and Deep Space Object Count

The number of stars that have been catalogued as part of the Hipparcos Star Catalogue from Delphinus is 521. The number of stars that are of magnitude 6.0 or lower in the constellation is 18. The number of stars in the constellation that make up the outline is 6.

There are no 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 Gliese 795 which is roughly about 54.54 Light Years from the Earth. The nearest star to the Earth with an exoplanet is HD 196885 which is about 109.34 Light Years. The furthest star that can be located in the constellation is HIP 102853 which is located about 81540.8 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 Delphinus with the naked eye is HD 196775. 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.

Legend of the Constellation

Delphinus is the dolphin that persuaded Amphitrite, a nereid that she should accept Poseidon`s wooing. Amphitrite had wanted to keep her virginity thus running off. Delphinus was one of those tasked with finding her. Another story has Delphinus as the dolphin who saved the Greek poet Arion of Lesbos from drowning after he was thrown overboard.

There are no major meteor showers that radiate from within this constellation.

Delphinus Facts


NameDelphinus
AbbreviationDel
Is a Zodiac Sign No
Brightest StarRotanev
Area188.549 sq. deg.
Percentage of Night Sky0.46%
Size Position69th
Hemisphere Northern
Site Exoplanet Count2
Meteor Shower Count3
Nearest StarGliese 795
Nearest Star with Exoplanet(s)HD 196885
Dimmest StarHD 196775
Furthest StarHIP 102853
Bright Star Count18
Hipparcos Star Count521
Main Star Count6
Messier Deep Space Object Count0
*Non-Messier Deep Space Object Count0
Bordering / Neighbouring / Surrounding ConstellationsVulpecula
Sagitta
Aquila
Aquarius
Equuleus
Pegasus

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


Delphinus Constellation Map


Delphinus Constellation Star Map

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

List of Stars with Exoplanets in Delphinus


StarDistance (Lt. Yrs.)Exoplanet CountDeclinationRight Ascension
HD 195019125.641+18d 46` 10.720h 28m 18.42
HD 196885109.341+11d 14` 58.020h 39m 51.85

List of Named Stars in Delphinus 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 Delphini742.97+10d 53` 45.320h 30m 17.95
10 Delphini507.25+14d 34` 58.420h 41m 16.21
13 Delphini428.60+06d 00` 29.720h 47m 48.33
14 Delphini500.25+07d 51` 51.020h 49m 48.24
15 Delphini99.87+12d 32` 41.620h 49m 37.74
16 Delphini197.32+12d 34` 06.620h 55m 38.55
17 Delphini479.65+13d 43` 17.620h 55m 36.68
Delta Delphini223.25+15d 04` 28.920h 43m 27.55
Deneb Dulfim330.46+11d 18` 12.020h 33m 12.76
Eta Delphini236.18+13d 01` 37.920h 33m 57.00
EU Delphini381.03+18d 16` 06.420h 37m 54.71
Gamma Delphini123.78+16d 07` 28.620h 46m 38.87
Gamma Delphini B126.32+16d 07` 29.220h 46m 39.52
Gliese 79554.54+04d 58` 18.720h 39m 37.20
Iota Delphini188.97+11d 22` 39.720h 37m 49.10
Kappa Delphini98.24+10d 05` 10.120h 39m 07.59
LU Delphini485.36+17d 31` 17.020h 41m 58.16
MR Delphini158.33+05d 13` 06.120h 31m 13.29
Musica245.60+10d 50` 21.720h 58m 25.96
Rotanev100.89+14d 35` 42.720h 37m 32.87
Sualocin253.82+15d 54` 43.420h 39m 38.25
Theta Delphini2013.35+13d 18` 54.520h 38m 43.98
U Delphini1568.09+18d 05` 24.220h 45m 28.23
W Delphini2203.81+18d 17` 03.820h 37m 40.09
Zeta Delphini220.08+14d 40` 27.120h 35m 18.51

Delphinus Constellation's Star Breakdown


Type Breakdown


TypeDescriptionCount
KLight Orange Star 3,700 - 5,200k162
AWhite 7,500 - 10,000k125
FYellow-White 6,000 - 7,500k92
GYellow 5,200 - 6,000k64
MRed Dwarf Star <3,700k40
BBlue-White 10,500 - 30,000k27

Size Breakdown


TypeDescriptionCount
VMain Sequence31
IIINormal Giant25
IVSubgiant13
PPulsar1
IaLuminous Supergiant1
IbLess Luminous Supergiant1

Breakdown of Dwarf Stars by Type


TypeDescriptionCount
VIVI Type Sub-Dwarf Star1

Breakdown of Carbon Stars by Type


TypeDescriptionCount
RR-Type Carbon Star1
NN-Type Carbon Star1


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