Phi Fornacis
Star in the constellation Fornax
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Phi Fornacis is a single[9] star in the southern constellation of Fornax. It has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of 5.13.[2] The distance to this object is approximately 154 light-years based on parallax,[1] and it is drifting further away with a radial velocity of +19 km/s.[4]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Fornax |
| Right ascension | 02h 28m 01.70348s[1] |
| Declination | −33° 48′ 39.7382″[1] |
| Apparent magnitude (V) | 5.13[2] |
| Characteristics | |
| Spectral type | A2.5V[3] |
| B−V color index | +0.089±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | +19.0±4.2[4] km/s |
| Proper motion (μ) | RA: +18.526[1] mas/yr Dec.: +5.163[1] mas/yr |
| Parallax (π) | 21.1604±0.1410 mas[1] |
| Distance | 154 ± 1 ly (47.3 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.79[2] |
| Details | |
| Mass | 2.11[5] M☉ |
| Radius | 1.74[6] R☉ |
| Luminosity | 16.66[2] L☉ |
| Surface gravity (log g) | 4.27[5] cgs |
| Temperature | 9,449±321[5] K |
| Rotational velocity (v sin i) | 116.8±0.8[7] km/s |
| Age | 238[5] Myr |
| Other designations | |
| φ For, CD−34°905, FK5 2168, GC 2967, HD 15427, HIP 11477, HR 724, SAO 193723[8] | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A2.5V.[3] Phi Fornacis is 238[5] million years old and is spinning with a projected rotational velocity of 117 km/s.[7] It has 2.1[5] times the mass of the Sun and 1.7[6] times the Sun's radius. The star is radiating 17[2] times the luminosity of the Sun from its photosphere at an effective temperature of 9,449 km/s.[5] It displays an infrared excess, suggesting a circumstellar disk[10] of dust is orbiting the star at a distance of 30.2 AU with a mean temperature of 100 K.[6]