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33 G. Librae
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Star 33 G. Librae

Multiple star system 33 G. Librae is located 19 light years away from the Sun. It is a system with 4 stars. For now, there are no known exoplanets in this star system.
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Sun distance
19 light years
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33 G. Librae A

Orange star, BY Draconis variable
Spectral class: K4 V

Location +

Ascension iconRight ascension: 14h 57m 29.187s
Declination iconDeclination: -21° 25' 23.305'' (southern hemisphere)
Parallax iconParallax: 169.884
Distance iconSun distance: 19.199 ly | 5.9 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: 80.2 % M Sun
| 840 M Jupiter
+
Star mass
Mass of the star 33 G. Librae A is 0.802 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: 74 % R Sun
| 7.4 R Jupiter
+
Star size
Radius of the star 33 G. Librae A is 0.739 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: 4625 K | 0.8 T Sun
+
Star temperature
Surface temperature of 33 G. Librae A is 4625 K, which is 80 % 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: 0.16 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): 5.7
Magnitude iconAbsolute magnitude (V): 6.9
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

33 G. Librae B

Red dwarf, Spectroscopic binary
Spectral class: M1 V

Basic characteristic

icon weight
Mass: 55 % M Sun
| 576 M Jupiter
+
Star mass
Mass of the star 33 G. Librae B is 0.802 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: 65 % R Sun
| 6.5 R Jupiter
+
Star size
Radius of the star 33 G. Librae B is 0.65 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: 4077 K | 0.71 T Sun
+
Star temperature
Surface temperature of 33 G. Librae B is 4077 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
luminosity icon
Luminosity: 0.02 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): 8.1
Magnitude iconAbsolute magnitude (V): 9.2
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

33 G. Librae C

Red dwarf, , Spectroscopic binary
Spectral class: M3 V

Basic characteristic

icon weight
Mass: 35 % M Sun
| 367 M Jupiter
+
Star mass
Mass of the star 33 G. Librae C is 0.55 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: 40 % R Sun
| 4 R Jupiter
(estimate)
+
Star size
Radius of the star 33 G. Librae C is not known. Its estimated value based on other similar stars is about 40 % 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 33 G. Librae C 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: 0.003 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

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

33 G. Librae D

Brown dwarf, , , Spectroscopic binary
Spectral class: T8 C

Basic characteristic

icon weight
Mass: 5 % M Sun
| 52 M Jupiter
+
Star mass
Mass of the star 33 G. Librae D is 0.35 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: 10 % R Sun
| 1.1 R Jupiter
(estimate)
+
Star size
Radius of the star 33 G. Librae D is not known. Its estimated value based on other similar stars is about 10 % 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: 500 K | 0.09 T Sun
+
Star temperature
Surface temperature of 33 G. Librae D is 500 K, which is 9 % 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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33 G. Librae system structure

 33 G. Librae A
33 G. Librae B
33 G. Librae C
33 G. Librae D

More about 33 G. Librae

      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. 33 G. Librae 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. 

      33 G. Librae 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
GJ 570 D, 2MASS J14571496-2121477, HD 131976, HN 28B, DENIS J145726.4-212439, GJ 570 B, HIC 73182, HIP 73182, JP11 2550, LFT 1160, LHS 386, LPM 550, LTT 5948, 2MASS J14572643-2124384, NLTT 38871, Bleonas star, Gliese 570, Lalande 27173, HR 5568, LAL 27173, HD 131977 / 131976, BD -20°4125, LHS 387, LTT 5949, GCTP 3375.00, SAO 183040, FK5 1391, LFT 1161, LPM 551, Vys 726, ADS 9446, HIP 73184, Gaia EDR3 6232511606838403968
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External sources
icon study
simbad icon
Simbad database (GJ 570 D)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 6305165514134625024)
Archive from the Gaia mission

Frequently Asked Questions

How far is the 33 G. Librae system from the Sun?

The 33 G. Librae system is 19 light years or 5.9 parsecs from the Sun.

What galaxy is the 33 G. Librae star in?

The 33 G. Librae is in the Milky Way galaxy just like the Sun.

How many stars are in the 33 G. Librae system?

The 33 G. Librae system contains 4 stars.

What type of star is the 33 G. Librae?

The primary in the 33 G. Librae system is a Orange star star.

What temperature is star 33 G. Librae?

The primary in the 33 G. Librae system has a temperature of 4625 K. Find out more about the temperature of stars in Stellar guide
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