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HD 1237
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Star HD 1237

Binary star HD 1237 is located 57 light years away from the Sun. It consists of a yellow star and a red dwarf. There is at least one exoplanet in this system.
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Sun distance
57 light years
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HD 1237 A

Yellow star, High proper motion star
Spectral class: G8V C

Location +

Ascension iconRight ascension: 0h 16m 15.308s
Declination iconDeclination: -79° 51' 5.147'' (southern hemisphere)
Parallax iconParallax: 56.964
Distance iconSun distance: 57.256 ly | 17.6 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: 100 % M Sun
| 1048 M Jupiter
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Star mass
Mass of the star HD 1237 A is 1 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: 86 % R Sun
| 8.6 R Jupiter
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Star size
Radius of the star HD 1237 A is 0.86 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: 5500 K | 0.95 T Sun
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Star temperature
Surface temperature of HD 1237 A is 5500 K, which is 95 % 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: 0.8 billions years | 0.17 Sun
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Star age
Star HD 1237 A is 0.8 billion years old, which is about 0.17 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: 0.64 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): 6.6
Magnitude iconAbsolute magnitude (V): 5.4
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

HD 1237 B

Red dwarf, , High proper motion star
Spectral class: M4V

Location +

Distance iconDistance from the primary: 68 AU

Basic characteristic

icon weight
Mass: 13 % M Sun
| 136 M Jupiter
+
Star mass
Mass of the star HD 1237 B is 1 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: 20 % R Sun
| 1.5 R Jupiter
(estimate)
+
Star size
Radius of the star HD 1237 B is not known. Its estimated value based on other similar stars is about 20 % 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: 3300 K
 (estimate)
+
Star temperature
Surface temperature of HD 1237 B is estimated to be 3300 K, which is 57 % 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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HD 1237 system structure

 HD 1237 A
HD 1237 A b 0.49 AU 1071.3 M⊕ 133.7 days
HD 1237 B 68 AU

More about HD 1237

       HD 1237 can be found in southern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope.
Other designations of this star
2 G. Hydri, CD−80° 9, GJ 3021, Gliese 3021, HIP 1292, HIC 1292, SAO 258219, 2MASS J00161266-7951042, LTT 127, NLTT 824, TIC 290543478, TYC 9354-780-1, Gaia EDR3 4634528720388462592
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External sources
gaia icon
Gaia database (Gaia EDR3 4634528720387797120)
Archive from the Gaia mission

Frequently Asked Questions

How far is the HD 1237 system from the Sun?

The HD 1237 system is 57 light years or 17.6 parsecs from the Sun.

What galaxy is the HD 1237 star in?

The HD 1237 is in the Milky Way galaxy just like the Sun.

How many stars are in the HD 1237 system?

The HD 1237 system contains 2 stars.

What type of star is the HD 1237?

The primary in the HD 1237 system is a Yellow star star.

What temperature is star HD 1237?

The primary in the HD 1237 system has a temperature of 5500 K. Find out more about the temperature of stars in Stellar guide
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L 50-73
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