4 Equulei
| 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 | |
HIP104101, HD200790 | |
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.
References
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