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Stellar Catalog
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Nearby stars catalogue
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HD 18438
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Star HD 18438

Red giant HD 18438 is located 768 light years away from the Sun. It is a single star of spectral class M2.5 III , that has 184 % of solar mass. There is at least one exoplanet in this system.
Sun distance
768 light years

HD 18438

Red giant (spectral class M2.5 III )

Location

Ascension iconRight ascension: 3h 6m 7.635s
Declination iconDeclination: 79° 25' 6.893'' (northern hemisphere)
Parallax iconParallax: 4.247
Distance iconSun distance: 767.961 ly | 235.5 pc

Basic characteristic

icon weight
Mass: 184 % M Sun | 1928 M Jupiter
radius icon
Size: 8850 % R Sun | 880.7 R Jupiter
temperature iconTemperature: 3860 K | 0.67 T Sun
time iconAge: 5.5 billions years | 1.2 Sun

1 exoplanet

HD 18438 b 2.1 AU 6676 M 803 days

Photometry

Magnitude iconApparent magnitude (V): 5.6
Magnitude iconAbsolute magnitude (V): -1.3
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
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
More about HD 18438
Star HD 18438 is is much bigger than the Sun and temperature on its surface is around 3860 K (3587 °C), which is about 67 % of Sun's temperature.
      HD 18438 can be found in northern celestial hemisphere, and it is possible to see it with naked eye. The star is easily observable from Northern America, Europe and Asia. 
Other designations of this star
TYC 4516-2147-1, USNO-A2 1650-00599936, HR 881, HIP 14417, TIC 297820335, 2MASS J03060788+7925066
External sources
Class of stars Red giant
The red giant is one of the final stages in the evolution of main sequence stars. These stars have already fused most of their hydrogen into helium, and their outer layers are gradually expanding. A white dwarf will form from the dense core of the original star, and the discarded upper layers will become a planetary nebula.  

In 5 billion years the Sun will also enter the red giant phase. Its size will then inflate to the orbit of Earth or Mars.
News from this star system
Article image:

Astronomers have discovered a brown dwarf orbiting the red giant HD 18438

Astronomers led by Byeong-Cheol Lee have made a groundbreaking discovery, detecting a brown dwarf orbiting the red giant HD 18438. With a radius of 89 times that of the Sun, HD 18438 is now the largest known star to be orbited by an exoplanet or brown dwarf.

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