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BD+05 4868
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Star BD+05 4868

BD+05 4868 is an Orange dwarf star with a mass of 0.7 solar masses and a radius of 0.69 solar radii. Located approximately 142 light-years from the Sun, the star is estimated to be 11.1 billion years old and has a surface temperature of 4540 Kelvin.
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Sun distance
142 light years
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BD+05 4868 A

Orange star

Location +

Ascension iconRight ascension: 21h 47m 26.748s
Declination iconDeclination: 6° 36' 19.200'' (equatorial region)
Parallax iconParallax: 22.932
Distance iconSun distance: 142.226 ly | 43.6 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: 70 % M Sun
| 733 M Jupiter
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Star mass
Mass of the star BD+05 4868 A is 0.7 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: 69 % R Sun
| 6.9 R Jupiter
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Star size
Radius of the star BD+05 4868 A is 0.69 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: 4540 K | 0.79 T Sun
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Star temperature
Surface temperature of BD+05 4868 A is 4540 K, which is 79 % 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: 11.1 billions years | 2.41 Sun
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Star age
Star BD+05 4868 A is 11.1 billion years old, which is about 2.41 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: 0.192 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

Magnitude iconApparent magnitude (V): 10.2
Magnitude iconAbsolute magnitude (V): 7
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

BD+05 4868 B

Red dwarf

Location +

Distance iconDistance from the primary: 130 AU

Basic characteristic

icon weight
Mass: 43 % M Sun
| 450 M Jupiter
+
Star mass
Mass of the star BD+05 4868 B is 0.7 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: 42 % R Sun
| 4.2 R Jupiter
+
Star size
Radius of the star BD+05 4868 B is 0.42 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: 3400 K
 (estimate)
+
Star temperature
Surface temperature of BD+05 4868 B is estimated to be 3433 K, which is 59 % 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: 0.023 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

Magnitude iconAbsolute magnitude (V): -3.2
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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BD+05 4868 system structure

 BD+05 4868 A
BD+05 4868 A b 0.02 AU 0 M⊕ 0.3 R⊕ 1.3 days
BD+05 4868 B 130 AU

More about BD+05 4868

       BD+05 4868 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.
Other designations of this star
TIC 2025181668, TIC 466376085, BD+05 4868A, HIP 107587, G 93-37, LSPM J2147+0636, LTT 18540, 2MASS J21472654+0636178, TYC 556-856-1, UCAC2 34205672, WISE J214726.69+063618.9, Gaia DR3 2700378125204437760, Gaia DR3 2700378125204437760
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External sources
icon study
icon study
gaia icon
Gaia database (Gaia DR3 2700378125203895808)
Archive from the Gaia mission

Frequently Asked Questions

How far is the BD+05 4868 system from the Sun?

The BD+05 4868 system is 142 light years or 43.6 parsecs from the Sun.

What galaxy is the BD+05 4868 star in?

The BD+05 4868 is in the Milky Way galaxy just like the Sun.

How many stars are in the BD+05 4868 system?

The BD+05 4868 system contains 2 stars.

What type of star is the BD+05 4868?

The primary in the BD+05 4868 system is a Orange star star.

What temperature is star BD+05 4868?

The primary in the BD+05 4868 system has a temperature of 4540 K. Find out more about the temperature of stars in Stellar guide

stellar brief logoStellar Brief

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30. 10. 2026
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The early architecture of planetary systems may be set at birth: a study of Sun-like stars found similar rates of star-planet misalignment across different stages of development. Other findings trace how water and carbon dioxide ice fade around young stars, why white-dwarf debris resists breaking into tiny pieces, and why a reported planet around Gliese 48 remains unconfirmed.
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