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Mu2 Scorpii
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Star Mu2 Scorpii

Subgiant Mu2 Scorpii is located 615 light years away from the Sun. It is a single star of spectral class B2IV, that has 870 % of solar mass. There are multiple known exoplanets in this system.
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Sun distance
615 light years
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Mu2 Scorpii

Subgiant
Spectral class: B2IV

Location +

Ascension iconRight ascension: 16h 52m 20.132s
Declination iconDeclination: -38° 1' 3.492'' (southern hemisphere)
Parallax iconParallax: 5.300
Distance iconSun distance: 615.389 ly | 188.7 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: 870 % M Sun
| 9114 M Jupiter
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Star mass
Mass of the star Mu2 Scorpii is 8.7 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: 700 % R Sun
| 69.7 R Jupiter
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Star size
Radius of the star Mu2 Scorpii is 7.0 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: 23113 K | 4 T Sun
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Star temperature
Surface temperature of Mu2 Scorpii is 23113 K, which is 400 % 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: 0.018 billions years | 0 Sun
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Star age
Star Mu2 Scorpii is 0.018 billion years old, which is about 0 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: 2385 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): 3.6
Magnitude iconAbsolute magnitude (V): -2.8
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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Mu2 Scorpii system structure

 Mu2 Scorpii
Mu2 Scorpii c
unconfirmed
 21 AU 5881.3 M⊕ -
Mu2 Scorpii b 242.4 AU 4577.9 M⊕ -

More about Mu2 Scorpii

Star Mu2 Scorpii is a main sequence star that fuses hydrogen atoms into helium. It is is approximately 7 times bigger than the Sun and temperature on its surface is around 23113 K (22840 °C), which is about 400 % of Sun's temperature.
       Mu2 Scorpii 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
µ2 Sco, Pipirima, μ² Scorpii, CD−37° 11037, HD 151985, HIC 82545, HIP 82545, HR 6252, SAO 208116
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External sources
icon study
A scaled-up planetary system around a supernova progenitor
Scientific study, Accepted: 04. 05. 2022

Frequently Asked Questions

How far is the Mu2 Scorpii system from the Sun?

The Mu2 Scorpii system is 615 light years or 188.7 parsecs from the Sun.

What galaxy is the Mu2 Scorpii star in?

The Mu2 Scorpii is in the Milky Way galaxy just like the Sun.

How many stars are in the Mu2 Scorpii system?

The Mu2 Scorpii is a single star, there are no other known stars in the system.

What type of star is the Mu2 Scorpii?

The star Mu2 Scorpii is a Subgiant star.

What temperature is star Mu2 Scorpii?

The star Mu2 Scorpii has an effective temperature of 23113 K. Find out more about the temperature of stars in Stellar guide
Class of stars Subgiant
A subgiant is a term used to describe a luminous star that is typically running out of hydrogen for nuclear fusion and is thus departing from the main sequence. These stars are classified as Yerkes luminosity class IV.
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