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Ross 440
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Star Ross 440

Red dwarf Ross 440 is located 33 light years away from the Sun. It is suspected double or multiple star of spectral class M3V , 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
33 light years
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Ross 440

Red dwarf
Spectral class: M3V

Location +

Ascension iconRight ascension: 9h 31m 19.419s
Declination iconDeclination: -13° 29' 18.935'' (equatorial region)
Parallax iconParallax: 99.880
Distance iconSun distance: 32.655 ly | 10.0 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: 40 % M Sun
| 366.6 M Jupiter
 (estimate)
+
Star mass
The mass of the star Ross 440 is unknown. Based on its other characteristics, it is estimated to be about 40 % 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: 40 % R Sun
| 4 R Jupiter
(estimate)
+
Star size
Radius of the star Ross 440 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 icon
Temperature: 3479 K | 0.6 T Sun
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Star temperature
Surface temperature of Ross 440 is 3479 K, which is 60 % 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): 10.1
Magnitude iconAbsolute magnitude (V): 10.1
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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Ross 440 system structure

 Ross 440

More about Ross 440

Nearby star Ross 440 is a main sequence star that fuses hydrogen atoms into helium. It is approximately 40 % of the size of Sun and temperature on its surface is around 3479 K (3206 °C), which is about 60 % of Sun's temperature.
       Ross 440 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
GJ 352, Gliese 352, KPR 41, KUI 41, HIC 46706, HIP 46706, LFT 656, LHS 2151, LTT 3500, 2MASS J09311936-1329192, MCC 26, NLTT 21974, TIC 293521985, TYC 5472-348-1, UBV M 5362
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External sources
simbad icon
Simbad database (Ross 440)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)

Frequently Asked Questions

How far is the Ross 440 system from the Sun?

The Ross 440 system is 33 light years or 10.0 parsecs from the Sun.

What galaxy is the Ross 440 star in?

The Ross 440 is in the Milky Way galaxy just like the Sun.

How many stars are in the Ross 440 system?

The Ross 440 is a single star, there are no other known stars in the system.

What type of star is the Ross 440?

The star Ross 440 is a Red dwarf star.

What temperature is star Ross 440?

The star Ross 440 has an effective temperature of 3479 K. 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.
Closest stars

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 0.07 M☉ 8.5 ly

LHS 6167
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