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FK Aquarii
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Star FK Aquarii

Binary star FK Aquarii is located 29 light years away from the Sun. It consists of 2 red dwarf stars. For now, there are no known exoplanets in this star system.
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Sun distance
29 light years
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FK Aquarii

Red dwarf, flare star, Spectroscopic binary
Spectral class: M1 Ve

Location +

Ascension iconRight ascension: 22h 38m 46.094s
Declination iconDeclination: -20° 37' 17.352'' (southern hemisphere)
Parallax iconParallax: 112.386
Distance iconSun distance: 29.021 ly | 8.9 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: 42 % M Sun
| 440 M Jupiter
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Star mass
Mass of the star FK Aquarii is 0.42 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: 73 % R Sun
| 7.3 R Jupiter
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Star size
Radius of the star FK Aquarii is 0.73 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: 3726 K | 0.64 T Sun
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Star temperature
Surface temperature of FK Aquarii is 3726 K, which is 64 % 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: 0.015 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): 9.1
Magnitude iconAbsolute magnitude (V): 9.3
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

FK Aquarii B

Red dwarf, flare star, Spectroscopic binary
Spectral class: M3.5V C

Basic characteristic

icon weight
Mass: 42 % M Sun
| 440 M Jupiter
+
Star mass
Mass of the star FK Aquarii B is 0.42 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: 52 % R Sun
| 5.2 R Jupiter
+
Star size
Radius of the star FK Aquarii B is 0.52 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 FK Aquarii B is estimated to be 3341 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

Magnitude iconApparent magnitude (V): 11.5
Magnitude iconAbsolute magnitude (V): 11.7
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
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FK Aquarii system structure

 FK Aquarii
FK Aquarii B

More about FK Aquarii

       FK Aquarii can be found in southern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is also observable from Northern America, Europe and Asia.
Other designations of this star
FL Aqr, V* FL Aqr, FK Aqr, Gliese 867, HD 214479, HIP 111802, BD-21 6267, FL Aquarii, Gaia EDR3 2400808142038361088
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External sources
simbad icon
Simbad database (V* FL Aqr)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 2400808245117576704)
Archive from the Gaia mission

Frequently Asked Questions

How far is the FK Aquarii system from the Sun?

The FK Aquarii system is 29 light years or 8.9 parsecs from the Sun.

What galaxy is the FK Aquarii star in?

The FK Aquarii is in the Milky Way galaxy just like the Sun.

How many stars are in the FK Aquarii system?

The FK Aquarii system contains 2 stars.

What type of star is the FK Aquarii?

The primary in the FK Aquarii system is a Red dwarf star.

What temperature is star FK Aquarii?

The primary in the FK Aquarii system has a temperature of 3726 K. Find out more about the temperature of stars in Stellar guide
Closest stars

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 0.63 M☉ 3.3 ly

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 0.17 M☉ 5.7 ly

Gliese 1265
 0.18 M☉ 5.8 ly

Fomalhaut
 1.9 M☉ 6 ly

Gliese 1276
 0.54 M☉ 7.1 ly
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