Qatar-4
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Andromeda[1] |
| Right ascension | 00h 19m 26.22s[2] |
| Declination | +44° 01′ 39.5″[2] |
| Apparent magnitude (V) | 13.60[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | K1V[3] |
| Variable type | planetary transit |
| Astrometry | |
| Proper motion (μ) | RA: 0.923±0.011 mas/yr[2] Dec.: −8.921±0.009 mas/yr[2] |
| Parallax (π) | 3.0567±0.0158 mas[2] |
| Distance | 1,067 ± 6 ly (327 ± 2 pc) |
| Details | |
| Mass | 0.856+0.029 −0.030[4] M☉ |
| Radius | 0.800+0.015 −0.014[4] R☉ |
| Luminosity | 0.481[3] L☉ |
| Surface gravity (log g) | 4.565+0.018 −0.020[4] cgs |
| Temperature | 5174+33 −35[4] K |
| Metallicity [Fe/H] | 0.095+0.076 −0.088[4] dex |
| Rotational velocity (v sin i) | 7.1±0.5[3] km/s |
| Age | 170±0.1[3] Myr |
| Other designations | |
| Gaia DR3 385697172809355392, Qatar 4, UCAC3 269-3518 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Qatar-4 is a faint K-dwarf star that hosts a planet in the constellation Andromeda. With an apparent magnitude of 13.60, it is impossible to detect with the naked eye, but can be detected with a powerful telescope. Qatar-4 is currently located 1,083 light years away based on parallax.
This star is a relatively young star with an age of only 170 million years. At this age, it is still on the main sequence. Qatar-4 has 89.6% the mass of the Sun, and 84.9% the latter's radius. Despite all of this, it only has 48.1% of the Sun's luminosity, which corresponds to an effective temperature of 5,120 K. Qatar-4 has a similar metallicity to the Sun, and rotates at a rate of 7.1 km/s.
