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Epsilon Serpentis
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Star Epsilon Serpentis

White-Blue star Epsilon Serpentis is located 72 light years away from the Sun. It is a single star of spectral class kA2hA5mA7V, that has 182 % of solar mass. For now, there are no known exoplanets in this star system.
Sun distance
72 light years
galaxy map

Epsilon Serpentis

White-Blue star, High proper motion star
Spectral class: kA2hA5mA7V

Location +

Ascension iconRight ascension: 15h 50m 49.109s
Declination iconDeclination: 4° 28' 40.824'' (equatorial region)
Parallax iconParallax: 45.329
Distance iconSun distance: 71.953 ly | 22.1 pc
Star position
The position of a star tells us where it appears in the sky, similar to how we use coordinates like latitude and longitude on Earth. In astronomy, the three main coordinates are right ascension, declination and distance. .. icon More about Star position in StellarGuide

Basic characteristic

icon weight
Mass: 182 % M Sun
| 1907 M Jupiter
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Star mass
Mass of the star Epsilon Serpentis is 1.820 solar masses.

The mass of a star is the total amount of matter it contains. It is one of the most important properties of a star, as it determines almost everything about how the star lives, changes, and dies. In astronomy, star mass is usually measured in solar masses (M☉) — where 1 solar mass is equal to the mass of our Sun... icon More about Star mass in StellarGuide
radius icon
Size: 178 % R Sun
| 17.7 R Jupiter
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Star size
Radius of the star Epsilon Serpentis is 1.783 solar radii.

The size of a star refers to its radius — the distance from its center to its surface. Star size is usually measured in solar radii (R☉), where 1 solar radius equals approximately 696,000 kilometers. Depending on their type and life stage, stars can be much smaller or larger than the Sun... icon More about Star size in StellarGuide
temperature icon
Temperature: 7928 K | 1.37 T Sun
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Star temperature
Surface temperature of Epsilon Serpentis is 7928 K, which is 137 % of the temperature on the surface of the Sun.

The temperature of a star refers to the temperature at its surface, also called the photosphere. It is measured in kelvins (K), the standard unit for temperature in astronomy. A star’s temperature tells us a lot about its physical properties and where it stands in its evolutionary stage... icon More about Star temperature in StellarGuide
time icon
Age: 0.5 billions years | 0.11 Sun
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Star age
Star Epsilon Serpentis is 0.5 billion years old, which is about 0.11 of the Sun's age.

The age of a star tells us how long it has been shining since it formed. Knowing a star’s age helps astronomers understand its life stage, how it has changed over time, and what will happen to it in the future... icon More about Star age in StellarGuide
luminosity icon
Luminosity: 12.134 L Sun
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Star luminosity
Luminosity is the total amount of energy a star gives off every second. Think of it as the star’s true brightness — not just how bright it looks from Earth. This is important because some stars may appear dim simply because they are far away, not because they’re actually faint... icon More about Star luminosity in StellarGuide

Photometry

Magnitude iconApparent magnitude (V): 3.7
Magnitude iconAbsolute magnitude (V): 2
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3
More about Epsilon Serpentis
Nearby star Epsilon Serpentis is a main sequence star that fuses hydrogen atoms into helium. It is is approximately 78 % bigger than the Sun and temperature on its surface is around 7928 K (7655 °C), which is about 137 % of Sun's temperature.
       Epsilon Serpentis can be found in northern celestial hemisphere, and it is possible to see it with naked eye. The star is easily observable from Northern America, Europe and Asia.
Other designations of this star
ε Ser, 37 Serpentis, BD+04°3069, HD 141795, HIP 77622, HR 5892, SAO 121218, Gaia EDR3 4426032591025363200
External sources
simbad icon
Simbad database (* eps Ser)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 4426032591025363200)
Archive from the Gaia mission
Closest stars

 PM J15589+0417
 - 3 ly

HD 141272
 - 3.9 ly

Alpha Serpentis
 1.7 M☉ 4 ly

PM J16060+0333
 - 5.3 ly

BD+11 2874
 - 8.5 ly
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