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HD 128311
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Star HD 128311

Orange star HD 128311 is located 53 light years away from the Sun. It is a single star of spectral class K3V C, that has 82 % of solar mass. There are multiple known exoplanets in this system.
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Sun distance
53 light years
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HD 128311

Orange star, BY Draconis variable
Spectral class: K3V C

Location +

Ascension iconRight ascension: 14h 36m 0.782s
Declination iconDeclination: 9° 44' 43.447'' (equatorial region)
Parallax iconParallax: 61.279
Distance iconSun distance: 53.225 ly | 16.3 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: 82 % M Sun
| 859 M Jupiter
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Star mass
Mass of the star HD 128311 is 0.82 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: 78 % R Sun
| 7.8 R Jupiter
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Star size
Radius of the star HD 128311 is 0.78 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: 4903 K | 0.85 T Sun
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Star temperature
Surface temperature of HD 128311 is 4903 K, which is 85 % 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: 0.75 billions years | 0.16 Sun
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Star age
Star HD 128311 is 0.75 billion years old, which is about 0.16 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: 0.308 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): 7.4
Magnitude iconAbsolute magnitude (V): 6.4
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
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HD 128311 system structure

 HD 128311
HD 128311 b 1.1 AU 693 M⊕ 458.6 days
HD 128311 c 1.76 AU 1023.7 M⊕ 928 days

More about HD 128311

Nearby star HD 128311 is a main sequence star that fuses hydrogen atoms into helium. It is approximately 80 % of the size of Sun and temperature on its surface is around 4903 K (4630 °C), which is about 85 % of Sun's temperature.
      a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface. HD 128311 can be found in northern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is easily observable from Northern America, Europe and Asia. 

      HD 128311 is a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface.
Other designations of this star
HN Boo, BD+10° 2710, GC 19679, GJ 3860, Gliese 3860, HD 128311, HIC 71395, HIP 71395, SAO 120554, LTT 14312, GSC 00910-00165, HZE 1A, G 66-11, G 135-72, 2MASS J14360055+0944474, LTT 14312, NLTT 37851, TIC 349606708, TYC 910-165-1, WISEA J143600.72+094444.5, Gaia EDR3 1176209886733406592
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External sources
simbad icon
Simbad database (HD 128311)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 1176209886733406592)
Archive from the Gaia mission

Frequently Asked Questions

How far is the HD 128311 system from the Sun?

The HD 128311 system is 53 light years or 16.3 parsecs from the Sun.

What galaxy is the HD 128311 star in?

The HD 128311 is in the Milky Way galaxy just like the Sun.

How many stars are in the HD 128311 system?

The HD 128311 is a single star, there are no other known stars in the system.

What type of star is the HD 128311?

The star HD 128311 is a Orange star star.

What temperature is star HD 128311?

The star HD 128311 has an effective temperature of 4903 K. Find out more about the temperature of stars in Stellar guide
Closest stars

 LP 440-38
 - 6 ly

2MASS J1448+1031
 - 6.9 ly

G 15-2
 - 7.9 ly

LP 440-17
 - 8.2 ly

HD 122742
 0.96 M☉ 8.2 ly
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