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Nova Persei 1901
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Star Nova Persei 1901

Binary star Nova Persei 1901 is located 1414 light years away from the Sun. It consists of a white dwarf and a subgiant. For now, there are no known exoplanets in this star system.
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Sun distance
1414 light years
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Nova Persei 1901 A

White dwarf

Location +

Ascension iconRight ascension: 3h 31m 12.002s
Declination iconDeclination: 43° 54' 15.192'' (northern hemisphere)
Parallax iconParallax: 2.306
Distance iconSun distance: 1,414.186 ly | 433.6 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: 103 % M Sun
| 1079 M Jupiter
+
Star mass
Mass of the star Nova Persei 1901 A is 1.03 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

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

Nova Persei 1901 B

Subgiant
Spectral class: K1IV

Basic characteristic

icon weight
Mass: 39 % M Sun
| 409 M Jupiter
+
Star mass
Mass of the star Nova Persei 1901 B is 1.03 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: 226 % R Sun
| 22.5 R Jupiter
+
Star size
Radius of the star Nova Persei 1901 B is 2.26 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 iconTemperature: 4800 K
 (estimate)
+
Star temperature
Surface temperature of Nova Persei 1901 B is estimated to be 4835 K, which is 83 % 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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Nova Persei 1901 system structure

 Nova Persei 1901 A
Nova Persei 1901 B

More about Nova Persei 1901

       Nova Persei 1901 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
GK Persei, GK Per, Nova Per 1901, HD 21629, HR 1057, BD+43 740a, 2MASS J03311201+4354154, 1RXS J033111.9+435427, Gaia DR3 238540495056450048
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External sources
icon study
Detection of a molecular hydrogen envelope around nova GK Persei
Scientific study, Accepted: 13. 03. 2026

Frequently Asked Questions

How far is the Nova Persei 1901 system from the Sun?

The Nova Persei 1901 system is 1414 light years or 433.6 parsecs from the Sun.

What galaxy is the Nova Persei 1901 star in?

The Nova Persei 1901 is in the Milky Way galaxy just like the Sun.

How many stars are in the Nova Persei 1901 system?

The Nova Persei 1901 system contains 2 stars.

What type of star is the Nova Persei 1901?

The primary in the Nova Persei 1901 system is a White dwarf star.

What temperature is the Nova Persei 1901?

The primary in the Nova Persei 1901 system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
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