CD-44 170
Coordinates: 
00h 39m 58.8243s, −44° 15′ 11.5824″
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 00h 39m 58.8243s[1] |
| Declination | −44° 15′ 11.5824″[1] |
| Apparent magnitude (V) | 11.401 |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | M0.5V[2] |
| Astrometry | |
| Radial velocity (Rv) | 11.85±0.19[3] km/s |
| Proper motion (μ) | RA: 483.002[3] mas/yr Dec.: −221.111[3] mas/yr |
| Parallax (π) | 42.3320 ± 0.0248[3] mas |
| Distance | 77.05 ± 0.05 ly (23.62 ± 0.01 pc) |
| Details | |
| Mass | 0.53[2] M☉ |
| Radius | 0.52[4] R☉ |
| Luminosity | 0.04597±0.00087[5] L☉ |
| Temperature | 3604±72[6] K |
| Metallicity [Fe/H] | −0.09±0.09[6] dex |
| Rotation | 31.8 d[2] |
| Other designations | |
| Database references | |
| SIMBAD | data |
CD-44 170, also known as Gliese 27.1, Gliese 9018 and HIP 3143, is an M-type main-sequence star. Its surface temperature is 3,604 K (6,028 °F; 3,331 °C)±72 K. The star's concentration of heavy elements is similar to that of the Sun.[6]
Planetary system[]
In 2014, a planet named with an orbital period of 16 days was announced. It was discovered using the radial velocity method.[7] The planetary equilibrium temperature is 406 K (271 °F; 133 °C).[5] The planet's existence was doubted until 2020 because the putative orbital period is equal to half of the star's rotational period.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| (disputed) | > 13+4.1 −6.6 M |