| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Antlia |
| Right ascension | 09h58m 52.27552s[1] |
| Declination | −35° 53′ 27.4977″[1] |
| Apparent magnitude (V) | 5.222[2] |
| Characteristics | |
| Spectral type | F1 V[3] |
| U−B color index | +0.068[2] |
| B−V color index | +0.333[2] |
| Astrometry | |
| Radial velocity (Rv) | +30[4] km/s |
| Proper motion (μ) | RA: −89.782[1] mas/yr Dec.: −16.245[1] mas/yr |
| Parallax (π) | 30.0606 ± 0.1080 mas[1] |
| Distance | 108.5 ± 0.4 ly (33.3 ± 0.1 pc) |
| Absolute magnitude (MV) | +2.62[5] |
| Details | |
| η Ant A | |
| Mass | 1.55[6] M☉ |
| Radius | 1.72[1] R☉ |
| Luminosity | 6.6[6] L☉ |
| Surface gravity (log g) | 3.94[3] cgs |
| Temperature | 7,132[3] K |
| Metallicity [Fe/H] | −0.20[3] dex |
| Age | 0.9[6] Gyr |
| Other designations | |
CD−35 6050, FK5 377, HD 86629, HIP 48926, HR 3947, SAO 200926, PPM 287133[7] | |
| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
Eta Antliae (η Ant, η Antliae) is the Bayer designation for a double star in the southern constellationofAntlia. The brighter component has an apparent visual magnitude of 5.222,[2] making it visible to the naked eye. Parallax measurements of the system yield a distance estimate of 108.5 light-years (33.3 parsecs) from Earth.[1]
The main component has a stellar classification of F1 V,[3] which indicates that it is an F-type main sequence star. This star has 55% more mass than the Sun.[6] It shines with 6.6[6] times the Sun's luminosity at an effective temperature of 7,132 K.[3] This heat gives it the yellow-white glow of an F-type star.[8] It has a faint companion located 31 arcseconds away with an apparent magnitude of +11.3. Most likely this pair form a binary star system.[9]
{{cite web}}: CS1 maint: postscript (link)
