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Ross 248
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Star Ross 248

Red dwarf Ross 248 is located 10 light years away from the Sun. It is a single flare star of spectral class M5.0V, that has 14 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
10 light years
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Ross 248

Red dwarf, flare star, BY Draconis variable
Spectral class: M5.0V

Location +

Ascension iconRight ascension: 23h 41m 55.213s
Declination iconDeclination: 44° 10' 13.353'' (northern hemisphere)
Parallax iconParallax: 316.481
Distance iconSun distance: 10.306 ly | 3.2 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: 13.6 % M Sun
| 142 M Jupiter
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Star mass
Mass of the star Ross 248 is 0.136 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: 16 % R Sun
| 1.6 R Jupiter
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Star size
Radius of the star Ross 248 is 0.16 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: 3142 K | 0.54 T Sun
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Star temperature
Surface temperature of Ross 248 is 3142 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
luminosity icon
Luminosity: 0.0018 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

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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Ross 248 system structure

 Ross 248

More about Ross 248

Nearby star Ross 248 is a main sequence star that fuses hydrogen atoms into helium. It is approximately 20 % of the size of Sun and temperature on its surface is around 3142 K (2869 °C), which is about 54 % of Sun's temperature.
      a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface. Ross 248 can be found in northern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope. 

      Ross 248 is a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface.
Other designations of this star
Gliese 905, GJ 905, HH Andromedae, HH And, 2MASS J23415498+4410407, G 171-010, GCTP 5736.00, LHS 549, Gaia EDR3 1926461164913660160
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External sources
simbad icon
Simbad database (Ross 248)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 1926461164913660160)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Ross 248 system from the Sun?

The Ross 248 system is 10 light years or 3.2 parsecs from the Sun.

What galaxy is the Ross 248 star in?

The Ross 248 is in the Milky Way galaxy just like the Sun.

How many stars are in the Ross 248 system?

The Ross 248 is a single star, there are no other known stars in the system.

What type of star is the Ross 248?

The star Ross 248 is a Red dwarf star.

What temperature is star Ross 248?

The star Ross 248 has an effective temperature of 3142 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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