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OU Geminorum Aa
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Star OU Geminorum Aa

Binary star OU Geminorum Aa is located 48 light years away from the Sun. It consists of a orange star and a red dwarf. For now, there are no known exoplanets in this star system.
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Sun distance
48 light years
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OU Geminorum Aa

Orange star, BY Draconis variable
Spectral class: K2Ve

Location +

Ascension iconRight ascension: 6h 26m 10.108s
Declination iconDeclination: 18° 45' 22.352'' (equatorial region)
Parallax iconParallax: 68.414
Distance iconSun distance: 47.674 ly | 14.6 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: 85 % M Sun
| 890 M Jupiter
+
Star mass
Mass of the star OU Geminorum Aa is 0.85 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: 81 % R Sun
| 8.1 R Jupiter
+
Star size
Radius of the star OU Geminorum Aa is 0.81 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: 4960 K | 0.86 T Sun
+
Star temperature
Surface temperature of OU Geminorum Aa is 4960 K, which is 86 % 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

OU Geminorum Ab

Red dwarf, High proper motion star

Basic characteristic

icon weight
Mass: 71 % M Sun
| 744 M Jupiter
+
Star mass
Mass of the star OU Geminorum Ab is 0.85 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: 65 % R Sun
| 6.5 R Jupiter
+
Star size
Radius of the star OU Geminorum Ab is 0.65 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: 4390 K | 0.76 T Sun
+
Star temperature
Surface temperature of OU Geminorum Ab is 4390 K, which is 76 % 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
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OU Geminorum Aa system structure

 OU Geminorum Aa
OU Geminorum Ab

More about OU Geminorum Aa

      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. OU Geminorum Aa 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. 

      OU Geminorum Aa 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
TYC 1336-16-1, TIC 430173956, WISEA J062610.15+184523.3, OU Gem, BD+18 1214, GJ 233, Gliese 233, HD 45088, HIC 30630, HIP 30630, SAO 95677, Gaia EDR3 3372159045216183552
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External sources
simbad icon
Simbad database (HD 45088B)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 3372159045217009920)
Archive from the Gaia mission

Frequently Asked Questions

How far is the OU Geminorum Aa system from the Sun?

The OU Geminorum Aa system is 48 light years or 14.6 parsecs from the Sun.

What galaxy is the OU Geminorum Aa star in?

The OU Geminorum Aa is in the Milky Way galaxy just like the Sun.

How many stars are in the OU Geminorum Aa system?

The OU Geminorum Aa system contains 2 stars.

What type of star is the OU Geminorum Aa?

The primary in the OU Geminorum Aa system is a Orange star star.

What temperature is star OU Geminorum Aa?

The primary in the OU Geminorum Aa system has a temperature of 4960 K. Find out more about the temperature of stars in Stellar guide
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