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Omicron Persei Aa
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Star Omicron Persei Aa

Triple star system Omicron Persei Aa is located 1079 light years away from the Sun. It is a system with 3 stars. For now, there are no known exoplanets in this star system.
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Sun distance
1079 light years
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Omicron Persei Aa

Blue Giant
Spectral class: B1III

Location +

Ascension iconRight ascension: 3h 44m 19.145s
Declination iconDeclination: 32° 17' 17.532'' (northern hemisphere)
Parallax iconParallax: 3.022
Distance iconSun distance: 1,079.146 ly | 330.9 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: 1400 % M Sun
| 14666 M Jupiter
+
Star mass
Mass of the star Omicron Persei Aa is 14 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: 960 % R Sun
| 95.5 R Jupiter
+
Star size
Radius of the star Omicron Persei Aa is 9.6 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: 22700 K | 3.93 T Sun
+
Star temperature
Surface temperature of Omicron Persei Aa is 22700 K, which is 393 % 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 iconAbsolute magnitude (V): -7.6
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

Omicron Persei Ab

Blue-white star
Spectral class: B2V

Basic characteristic

icon weight
Mass: 1000 % M Sun
| 10476 M Jupiter
+
Star mass
Mass of the star Omicron Persei Ab is 14 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: 890 % R Sun
| 88.6 R Jupiter
+
Star size
Radius of the star Omicron Persei Ab is 8.9 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: 21000 K | 3.63 T Sun
+
Star temperature
Surface temperature of Omicron Persei Ab is 21000 K, which is 363 % 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 iconAbsolute magnitude (V): -7.6
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

Omicron Persei B

Yellow-White star

Basic characteristic

temperature iconTemperature: 21500 K
 (estimate)
+
Star temperature
Surface temperature of Omicron Persei B is estimated to be 21500 K, which is 372 % 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): 6.7
Magnitude iconAbsolute magnitude (V): -0.9
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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Omicron Persei Aa system structure

 Omicron Persei Aa
Omicron Persei Ab
Omicron Persei B

More about Omicron Persei Aa

       Omicron Persei Aa 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
ο Persei, Atik, 38 Persei, ADS 2726 AB, BD+31°642, CCDM J03443+3217AB, GC 4461, GSC 02359-01258, HIP 17448, HR 1131, HD 23180, SAO 56673, WDS J03443+3217AB
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Frequently Asked Questions

How far is the Omicron Persei Aa system from the Sun?

The Omicron Persei Aa system is 1079 light years or 330.9 parsecs from the Sun.

What galaxy is the Omicron Persei Aa star in?

The Omicron Persei Aa is in the Milky Way galaxy just like the Sun.

How many stars are in the Omicron Persei Aa system?

The Omicron Persei Aa system contains 3 stars.

What type of star is the Omicron Persei Aa?

The primary in the Omicron Persei Aa system is a Blue Giant star.

What temperature is star Omicron Persei Aa?

The primary in the Omicron Persei Aa system has a temperature of 22700 K. Find out more about the temperature of stars in Stellar guide
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