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OT Serpentis
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Star OT Serpentis

Red dwarf OT Serpentis is located 37 light years away from the Sun. It is a single star of spectral class M1.0V, that has 55 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
37 light years
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OT Serpentis

Red dwarf, High proper motion star
Spectral class: M1.0V

Location +

Ascension iconRight ascension: 15h 21m 53.034s
Declination iconDeclination: 20° 58' 41.960'' (northern hemisphere)
Parallax iconParallax: 87.325
Distance iconSun distance: 37.350 ly | 11.5 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: 55 % M Sun
| 576 M Jupiter
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Star mass
Mass of the star OT Serpentis is 0.55 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: 52 % R Sun
| 5.2 R Jupiter
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Star size
Radius of the star OT Serpentis is 0.52 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: 3134 K | 0.54 T Sun
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Star temperature
Surface temperature of OT Serpentis is 3134 K, which is 54 % 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

Photometry

Magnitude iconApparent magnitude (V): 10
Magnitude iconAbsolute magnitude (V): 9.7
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
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OT Serpentis system structure

 OT Serpentis

More about OT Serpentis

Nearby star OT Serpentis is a main sequence star that fuses hydrogen atoms into helium. It is approximately 50 % of the size of Sun and temperature on its surface is around 3134 K (2861 °C), which is about 54 % of Sun's temperature.
       OT Serpentis can be found in northern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is easily observable from Northern America, Europe and Asia.
Other designations of this star
BD+21 2763, GJ 9520, Gliese 9520, HIC 75187, HIP 75187, 2MASS J15215291+2058394, RBS 1489, TIC 355793860, TYC 1493-378-1, USNO-B1.0 1109-00243006, V* OT Ser, Gaia EDR3 1214160733157163008
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External sources
simbad icon
Simbad database (V* OT Ser)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 1214160733157163008)
Archive from the Gaia mission

Frequently Asked Questions

How far is the OT Serpentis system from the Sun?

The OT Serpentis system is 37 light years or 11.5 parsecs from the Sun.

What galaxy is the OT Serpentis star in?

The OT Serpentis is in the Milky Way galaxy just like the Sun.

How many stars are in the OT Serpentis system?

The OT Serpentis is a single star, there are no other known stars in the system.

What type of star is the OT Serpentis?

The star OT Serpentis is a Red dwarf star.

What temperature is star OT Serpentis?

The star OT Serpentis has an effective temperature of 3134 K. Find out more about the temperature of stars in Stellar guide
Class of stars Red dwarf
Red dwarfs are small, cool stars with surface temperatures of about 2,000–3,800 K, much cooler than the Sun. They usually have 8–50% of the Sun’s mass and shine very faintly, sometimes at just a tiny fraction of the Sun’s brightness. Classified mainly as spectral type M, they are the most common stars in the Milky Way, making up roughly 70–75% of its stellar population.

They fuse hydrogen slowly through the proton–proton chain and are fully convective, which allows them to use their fuel very efficiently. As a result, red dwarfs can live for tens of billions to trillions of years—far longer than the Sun. Many exoplanets orbit red dwarfs, including some in close habitable zones, though strong stellar activity can affect planetary environments.
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 0.18 M☉ 2.4 ly

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 - 2.7 ly

TVLM 513-46
 0.09 M☉ 4 ly

Ross 52
 - 4.5 ly

WISE J154214.00+223005.2
 - 4.6 ly
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