4 Equulei
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Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Equuleus |
Right ascension | 21h 05m 26.79s |
Declination | 05° 57′ 30.6″ |
Apparent magnitude (V) | 5.94 |
Characteristics | |
Spectral type | F8V |
B−V color index | 0.54[1] |
R−I color index | 0.20[1] |
Astrometry | |
Radial velocity (Rv) | -12.70 ± 0.30[1] km/s |
Proper motion (μ) | RA: -89.10 ± 1.10[1] mas/yr Dec.: -129.90 ± 1.10[1] mas/yr |
Parallax (π) | 27.06 ± 1.07[1] mas |
Distance | 120.4[2] ly (36.91[2] pc) |
Absolute magnitude (MV) | 3.1 |
Details | |
Mass | 1.2[2] M☉ |
Radius | approx 1.2[2] R☉ |
Luminosity | 2[2] L☉ |
Temperature | 6200 K |
Metallicity [Fe/H] | -0.04 ± 0.01 [1] dex |
Other designations | |
4 Equulei is a double star in the constellation of Equuleus.
Properties
The main component is a F-type main sequence star at an age of 2.2 billion years. It weighs 2.4×1030 kilograms. This star also has a luminosity of 2 times the Sun's luminosity.
See also
References
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