![]() Debris ring around Fomalhaut showing location of planet Fomalhaut b—imaged by Hubble Space Telescope's coronagraph. NASA photo. |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Piscis Austrinus |
Pronunciation | /ˈfoʊməl.hɔːt/, /ˈfoʊməlɔːt/, /foʊməlˈhɔːt/ |
Right ascension | 22 |
Declination | −29° 37′ 20.050″ |
Apparent magnitude (V) | 1.16 |
Characteristics | |
Spectral type | A3 V |
U−B color index | 0.08 |
B−V color index | 0.09 |
Astrometry | |
Radial velocity (Rv) | +6.5 km/s |
Proper motion (μ) | RA: +328.95 mas/yr |
Parallax (π) | 129.81 ± 0.47mas |
Distance | 25.13 ± 0.09 ly (7.70 ± 0.03 pc) |
Absolute magnitude (MV) | 1.73 |
Details | |
Mass | 2.1 ± 0.2M☉ |
Radius | 1.832R☉ |
Luminosity | 17.66L☉ |
Surface gravity (log g) | 4.21 |
Temperature | 8,751K |
Metallicity [Fe/H] | −0.03dex |
Rotational velocity (v sin i) | 93 km/s |
Age | (2 ± 1) × 10 years |
Other designations | |
α Piscis Austrini, Alp PsA, Alf PsA, 24 PsA, Gl 881, HR 8728, CD -30°19370, HD 216956, GCTP 5565.00, LTT 9292, SAO 191524, FK5 867, HIP 113368.
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Database references | |
SIMBAD | data |
Exoplanet Archive | data |
ARICNS | data |
Extrasolar Planets Encyclopaedia |
data |