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Delta Capricorni Aa
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Star Delta Capricorni Aa

Triple star system Delta Capricorni Aa is located 38 light years away from the Sun. It is a system with 3 stars. For now, there are no known exoplanets in this star system.
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Sun distance
38 light years
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Delta Capricorni Aa

Blue Giant
Spectral class: A7m III

Location +

Ascension iconRight ascension: 21h 47m 2.735s
Declination iconDeclination: -16° 7' 42.986'' (equatorial region)
Parallax iconParallax: 85.941
Distance iconSun distance: 37.951 ly | 11.6 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: 200 % M Sun
| 2095 M Jupiter
+
Star mass
Mass of the star Delta Capricorni Aa is 2.0 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: 191 % R Sun
| 19 R Jupiter
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Star size
Radius of the star Delta Capricorni Aa is 1.91 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: 7021 K | 1.22 T Sun
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Star temperature
Surface temperature of Delta Capricorni Aa is 7021 K, which is 122 % 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: 8.5 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): 2.8
Magnitude iconAbsolute magnitude (V): 2.5
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

Delta Capricorni Ab

Blue Giant

Basic characteristic

temperature iconTemperature: 7000 K
 (estimate)
+
Star temperature
Surface temperature of Delta Capricorni Ab is estimated to be 7021 K, which is 121 % 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

Delta Capricorni B

Orange star
Spectral class: K/G

Basic characteristic

icon weight
Mass: 73 % M Sun
| 765 M Jupiter
+
Star mass
Mass of the star Delta Capricorni B is 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: 90 % R Sun
| 9 R Jupiter
+
Star size
Radius of the star Delta Capricorni B is 0.9 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: 4500 K | 0.78 T Sun
+
Star temperature
Surface temperature of Delta Capricorni B is 4500 K, which is 78 % 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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Delta Capricorni Aa system structure

Stars A and B form a pair, which is orbited by the more distant star C.
 Delta Capricorni Aa
Delta Capricorni Ab
Delta Capricorni B

More about Delta Capricorni Aa

       Delta Capricorni Aa can be found in southern celestial hemisphere, and it is possible to see it with naked eye. The star is also observable from Northern America, Europe and Asia.
Other designations of this star
Deneb Algedi, Deneb Algiedi, Scheddi, δ Cap, Del Cap, 49 Capricorni, BD−16 5943, FK5 819, GJ 837, HD 207098, HIP 107556, HR 8322, SAO 164644, ADS 15314, WDS 21470-1608, Gaia EDR3 6838311796136238976
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Frequently Asked Questions

How far is the Delta Capricorni Aa system from the Sun?

The Delta Capricorni Aa system is 38 light years or 11.6 parsecs from the Sun.

What galaxy is the Delta Capricorni Aa star in?

The Delta Capricorni Aa is in the Milky Way galaxy just like the Sun.

How many stars are in the Delta Capricorni Aa system?

The Delta Capricorni Aa system contains 3 stars.

What type of star is the Delta Capricorni Aa?

The primary in the Delta Capricorni Aa system is a Blue Giant star.

What temperature is star Delta Capricorni Aa?

The primary in the Delta Capricorni Aa system has a temperature of 7021 K. Find out more about the temperature of stars in Stellar guide
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