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CW Ursae Majoris
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Star CW Ursae Majoris

Red dwarf CW Ursae Majoris is located 44 light years away from the Sun. It is a single flare star of spectral class M3.5V C, that has typically about 25 % of solar mass. For now, there are no known exoplanets in this star system.
Sun distance
44 light years
galaxy map

CW Ursae Majoris

Red dwarf, flare star
Spectral class: M3.5V C

Location +

Ascension iconRight ascension: 11h 11m 51.524s
Declination iconDeclination: 33° 32' 13.095'' (northern hemisphere)
Parallax iconParallax: 74.884
Distance iconSun distance: 43.555 ly | 13.4 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: 30 % M Sun
| 272.4 M Jupiter
 (estimate)
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Star mass
The mass of the star CW Ursae Majoris is unknown. Based on its other characteristics, it is estimated to be about 30 % of the Sun's mass.

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: 30 % R Sun
| 2.9 R Jupiter
(estimate)
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Star size
Radius of the star CW Ursae Majoris is not known. Its estimated value based on other similar stars is about 30 % 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: 3280 K | 0.57 T Sun
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Star temperature
Surface temperature of CW Ursae Majoris is 3280 K, which is 57 % 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

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 CW Ursae Majoris
Nearby star CW Ursae Majoris is a main sequence star that fuses hydrogen atoms into helium. It is approximately 30 % of the size of Sun and temperature on its surface is around 3280 K (3007 °C), which is about 57 % of Sun's temperature.
       CW Ursae Majoris can be found in northern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
Other designations of this star
Gliese 3647, GJ 3647, V* CW UMa, SV* P 719, G 119-62, HAT 228-00237, LSPM J1111+3332W, 2MASS J11115176+3332111, NLTT 26581, PM J11118+3332S, TIC 85334035, USNO-B1.0 1235-00200538 , Gaia EDR3 758200712885953280
External sources
simbad icon
Simbad database (V* CW UMa)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 758200712885953280)
Archive from the Gaia mission
Class of stars Red dwarf
Red dwarfs are small, relatively cool, reddish stars. They are by far the most common type of star in the solar neighborhood. Their mass typically ranges from about 8% to 50% of the Sun's mass.
Closest stars

 Gliese 414
 0.65 M☉ 5.3 ly

BD+39 2376
 - 5.9 ly

47 Ursae Majoris
 1.1 M☉ 5.9 ly

GD 140
 0.97 M☉ 9.3 ly

DS Leonis
 0.58 M☉ 9.6 ly
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