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Iota Pegasi
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Star Iota Pegasi

Binary star Iota Pegasi is located 39 light years away from the Sun. It consists of a yellow-white star and a yellow star. For now, there are no known exoplanets in this star system.
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Sun distance
39 light years
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Iota Pegasi A

Yellow-White star, Spectroscopic binary
Spectral class: F5V

Location +

Ascension iconRight ascension: 22h 7m 1.014s
Declination iconDeclination: 25° 20' 42.795'' (northern hemisphere)
Parallax iconParallax: 84.005
Distance iconSun distance: 38.826 ly | 11.9 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: 133 % M Sun
| 1393 M Jupiter
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Star mass
Mass of the star Iota Pegasi A is 1.33 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: 153 % R Sun
| 15.2 R Jupiter
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Star size
Radius of the star Iota Pegasi A is 1.526 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: 6504 K | 1.13 T Sun
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Star temperature
Surface temperature of Iota Pegasi A is 6504 K, which is 113 % 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: 0.5 billions years | 0.11 Sun
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Star age
Star Iota Pegasi A is 0.5 billion years old, which is about 0.11 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

Photometry

Magnitude iconApparent magnitude (V): 3.8
Magnitude iconAbsolute magnitude (V): 3.4
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

Iota Pegasi B

Yellow star, , Spectroscopic binary
Spectral class: G8V

Basic characteristic

icon weight
Mass: 82 % M Sun
| 859 M Jupiter
+
Star mass
Mass of the star Iota Pegasi B is 1.33 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: 73 % R Sun
| 7.3 R Jupiter
+
Star size
Radius of the star Iota Pegasi B is 0.73 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: 5060 K | 0.88 T Sun
+
Star temperature
Surface temperature of Iota Pegasi B is 5060 K, which is 88 % 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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Iota Pegasi system structure

 Iota Pegasi A
Iota Pegasi B

More about Iota Pegasi

       Iota 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
ι Peg, 24 Pegasi, BD+24°4533, FK5 831, HD 210027, HIC 109176, HIP 109176, HR 8430, SAO 90238, WDS J22070+2521A, Gaia EDR3 1891598193816300544
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Frequently Asked Questions

How far is the Iota Pegasi system from the Sun?

The Iota Pegasi system is 39 light years or 11.9 parsecs from the Sun.

What galaxy is the Iota Pegasi star in?

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

How many stars are in the Iota Pegasi system?

The Iota Pegasi system contains 2 stars.

What type of star is the Iota Pegasi?

The primary in the Iota Pegasi system is a Yellow-White star star.

What temperature is star Iota Pegasi?

The primary in the Iota Pegasi system has a temperature of 6504 K. Find out more about the temperature of stars in Stellar guide
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 0.5 M☉ 4.7 ly

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BD+27 4120
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V374 Pegasi
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