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85 Pegasi
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Star 85 Pegasi

Binary star 85 Pegasi is located 40 light years away from the Sun. It consists of a yellow star and a orange star. For now, there are no known exoplanets in this star system.
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Sun distance
40 light years
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85 Pegasi A

Yellow star, Spectroscopic binary
Spectral class: G5VbFe-2

Location +

Ascension iconRight ascension: 0h 2m 11.209s
Declination iconDeclination: 27° 4' 39.535'' (northern hemisphere)
Parallax iconParallax: 81.179
Distance iconSun distance: 40.177 ly | 12.3 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: 88 % M Sun
| 922 M Jupiter
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Star mass
Mass of the star 85 Pegasi A is 0.88 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: 91 % R Sun
| 9.1 R Jupiter
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Star size
Radius of the star 85 Pegasi A is 0.91 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: 5550 K | 0.96 T Sun
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Star temperature
Surface temperature of 85 Pegasi A is 5550 K, which is 96 % 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
time icon
Age: 4 billions years | 0.87 Sun
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Star age
Star 85 Pegasi A is 4 billion years old, which is about 0.87 of the Sun's age.

The age of a star tells us how long it has been shining since it formed. Knowing a star’s age helps astronomers understand its life stage, how it has changed over time, and what will happen to it in the future... icon More about Star age in StellarGuide
luminosity icon
Luminosity: 0.61 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

Magnitude iconApparent magnitude (V): 5.8
Magnitude iconAbsolute magnitude (V): 5.3
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

85 Pegasi B

Orange star, , Spectroscopic binary

Basic characteristic

icon weight
Mass: 55 % M Sun
| 576 M Jupiter
+
Star mass
Mass of the star 85 Pegasi B is 0.88 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: 67 % R Sun
| 6.7 R Jupiter
+
Star size
Radius of the star 85 Pegasi B is 0.67 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: 4200 K | 0.73 T Sun
+
Star temperature
Surface temperature of 85 Pegasi B is 4200 K, which is 73 % 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: 0.05 L Sun
+
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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85 Pegasi system structure

 85 Pegasi A
85 Pegasi B

More about 85 Pegasi

       85 Pegasi 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
ADS 17175 B, GJ 914 B, BD +26°4734 B, BU 733 B, * 85 Peg, BDS 12701, HR 9088, HD 224930, LFT 1848, LHS 101, LTT 17088, SAO 91669, HIP 171, HIC 171, ADS 17175 A, GJ 914 A, BD +26°4734 A, BU 733 A, Gliese 914, GJ 914, Gaia EDR3 2853900872207888768
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Frequently Asked Questions

How far is the 85 Pegasi system from the Sun?

The 85 Pegasi system is 40 light years or 12.3 parsecs from the Sun.

What galaxy is the 85 Pegasi star in?

The 85 Pegasi is in the Milky Way galaxy just like the Sun.

How many stars are in the 85 Pegasi system?

The 85 Pegasi system contains 2 stars.

What type of star is the 85 Pegasi?

The primary in the 85 Pegasi system is a Yellow star star.

What temperature is star 85 Pegasi?

The primary in the 85 Pegasi system has a temperature of 5550 K. Find out more about the temperature of stars in Stellar guide
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