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UCAC4 681-101797
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Star UCAC4 681-101797

Red dwarf UCAC4 681-101797 is located 71 light years away from the Sun. It is a single star, that has typically about 25 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
71 light years
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UCAC4 681-101797

Red dwarf, High proper motion star

Location +

Ascension iconRight ascension: 21h 17m 57.168s
Declination iconDeclination: 46° 1' 30.792'' (northern hemisphere)
Parallax iconParallax: 45.940
Distance iconSun distance: 70.996 ly | 21.8 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: 30 % M Sun
| 272.4 M Jupiter
 (estimate)
+
Star mass
The mass of the star UCAC4 681-101797 is unknown. Based on its other characteristics, it is estimated to be about 30 % of the Sun's mass.

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: 30 % R Sun
| 2.9 R Jupiter
(estimate)
+
Star size
Radius of the star UCAC4 681-101797 is not known. Its estimated value based on other similar stars is about 30 % 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 UCAC4 681-101797 is estimated to be 3300 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): 14.2
Magnitude iconAbsolute magnitude (V): 12.5
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
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UCAC4 681-101797 system structure

 UCAC4 681-101797

More about UCAC4 681-101797

       UCAC4 681-101797 can be found in northern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
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External sources
simbad icon
Simbad database (UCAC4 681-101797)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)

Frequently Asked Questions

How far is the UCAC4 681-101797 system from the Sun?

The UCAC4 681-101797 system is 71 light years or 21.8 parsecs from the Sun.

What galaxy is the UCAC4 681-101797 star in?

The UCAC4 681-101797 is in the Milky Way galaxy just like the Sun.

How many stars are in the UCAC4 681-101797 system?

The UCAC4 681-101797 is a single star, there are no other known stars in the system.

What type of star is the UCAC4 681-101797?

The star UCAC4 681-101797 is a Red dwarf star.

What temperature is the UCAC4 681-101797?

The primary in the UCAC4 681-101797 system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
Class of stars Red dwarf
Red dwarfs are small, cool stars with surface temperatures of about 2,000–3,800 K, much cooler than the Sun. They usually have 8–50% of the Sun’s mass and shine very faintly, sometimes at just a tiny fraction of the Sun’s brightness. Classified mainly as spectral type M, they are the most common stars in the Milky Way, making up roughly 70–75% of its stellar population.

They fuse hydrogen slowly through the proton–proton chain and are fully convective, which allows them to use their fuel very efficiently. As a result, red dwarfs can live for tens of billions to trillions of years—far longer than the Sun. Many exoplanets orbit red dwarfs, including some in close habitable zones, though strong stellar activity can affect planetary environments.
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