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HD 99279 B
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Star HD 99279 B

Orange star HD 99279 B is located 38 light years away from the Sun. It is a single star of spectral class K7, that has 62 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
38 light years
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HD 99279 B

Orange star, High proper motion star
Spectral class: K7

Basic characteristic

icon weight
Mass: 62 % M Sun
| 649 M Jupiter
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Star mass
Mass of the star HD 99279 B is 0.62 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
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Star size
Radius of the star HD 99279 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 iconTemperature: 4100 K
 (estimate)
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Star temperature
Surface temperature of HD 99279 B is estimated to be 4062 K, which is 71 % 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): 8.6
Magnitude iconAbsolute magnitude (V): 8.3
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
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HD 99279 B system structure

 HD 99279 A
HD 99279 B

More about HD 99279 B

       HD 99279 B 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
GJ 428 B, Gliese 428 B, TYC 8959-1969-1, TIC 315311765, 2MASS J11243947-6138542, Gaia EDR3 5334356223546958464
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External sources
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Scientific study, Accepted: 29. 12. 2026
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A Spatial Map of the Atmospheric Limb of a Hot Jupiter
Scientific study, Accepted: 14. 10. 2026
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icon study
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icon study
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simbad icon
Simbad database (HD 99279B)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 5334356223546958464)
Archive from the Gaia mission

News from this star system

Massive brown dwarf HD 203771 b confirmed in eccentric orbit around orange dwarf
iconYesterday
Image: Massive brown dwarf HD 203771 b confirmed in eccentric orbit around orange dwarf
Massive brown dwarf HD 203771 b confirmed in an eccentric orbit around an orange dwarf star. New mass measurements place the companion at approximately 70 times the mass of Jupiter, revealing insights into how brown dwarfs migrate inward over time....
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HD 158485 revealed as a binary system containing two pulsating stars
iconYesterday
Image: HD 158485 revealed as a binary system containing two pulsating stars
HD 158485, a calibration star for the James Webb Space Telescope, is actually a binary system. Observations from TESS show two pulsating stars orbiting each other every 382.8 days, which helps refine absolute-flux measurements for astronomical data....
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Escaping atmosphere of the ultrahot Jupiter KELT-18 b reveals metastable helium
iconYesterday
Image: Escaping atmosphere of the ultrahot Jupiter KELT-18 b reveals metastable helium
Researchers have detected metastable helium escaping from the ultrahot Jupiter KELT-18 b. This confirms the massive gas giant is undergoing active atmospheric photoevaporation. KELT-18 b is now the most massive planet found with this specific helium signature....
Read article tag icon

Frequently Asked Questions

How far is the HD 99279 B system from the Sun?

The HD 99279 B system is 38 light years or 11.7 parsecs from the Sun.

What galaxy is the HD 99279 B star in?

The HD 99279 B is in the Milky Way galaxy just like the Sun.

How many stars are in the HD 99279 B system?

The HD 99279 B is a single star, there are no other known stars in the system.

What type of star is the HD 99279 B?

The star HD 99279 B is a Orange star star.

What temperature is the HD 99279 B?

The primary in the HD 99279 B system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
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icon Data in Stellar Catalog come from trusted scientific sources. Primary source is Gaia space telescope mapping the stars in Milky Way. Other sources include research papers, Simbad catalog and Exoplanet.eu database.
Estimated values
icon Objects listed in the Stellar Catalog often have values that are estimates. These estimates are determined using their known characteristics, such as spectral type, brightness across different wavelengths, distance from a star, and other factors.
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Stellar Catalog brings the stars from our galaxy to you. Discover their position, physical properties and whether there are any exoplanets or disks orbiting them. The data in Stellar Catalog come from respectable sources like Gaia space telescope, or SIMBAD database.
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