Theta Antliae
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Antlia |
| Right ascension | 09h 44m 12.110s |
| Declination | -27° 46′ 10.30″ |
| Apparent magnitude (V) | 2.07 |
| Characteristics | |
| Spectral type | A8V |
| U-B color index | 0.35 |
| B-V color index | 0.51 |
| Astrometry | |
| Radial velocity (Rv) | 24 km/s |
| Proper motion (μ) | RA: -47.8 mas/yr Dec.: 34.0 mas/yr |
| Parallax (π) | 0.053 ± 0 mas |
| Distance | 61538.93962 ± 0 ly (18867.92453 ± 0 pc) |
| Absolute magnitude (MV) | 5.3 |
| Details | |
| Mass | 3.1 M☉ |
| Radius | 2.1 R☉ |
| Luminosity | 40 L☉ |
| Temperature | 7,500–10,000 K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Orbit | |
| Companion | θ Antliae B |
| Period (P) | 18.32 yr |
| Semimajor axis (a) | 0.134" |
| Eccentricity (e) | 0.445 |
| Inclination (i) | 124° |
| Longitude of the node (Ω) | 176.8° |
| Periastron epoch (T) | 1965.75 |
| Other designations | |
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CCDM J09442-2746AB, GC 13425, N30 2331, SRS 30366, GCRV 6265, PLX 2308, TD1 14234, FIN 326AB, PMC 90-93 262, UBV 9220, CD-27° 6881, HD 84367, PPM 256646, uvby98 100084367 AB, CPD-27 3851, HR 3871, SACS 217, YZ 117 6360, CSI-27° 6881 21, IDS 09397-2719, SAO 177908, WDS J09442-2746, FK5 366, JP11 1856.
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| Database references | |
| SIMBAD | data |
Theta Antliae (θ Ant / θ Antliae) or IDS 09397-2719 B is a binary star in the constellation Antlia. It is approximately 384 light years from Earth and has a combined apparent magnitude of +4.78.
The primary component, θ Antliae A, is a white A-type main sequence dwarf with an apparent magnitude of +5.6. The companion, θ Antliae B, is a yellow-white F-type bright giant with an apparent magnitude of +5.7. The binary has an orbital period of 18.3 years and the components are separated by 0.1 arcseconds.
[edit] Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| IDS 09397-2719 A (GJ 9306 A) | 09h 44m 12.0953s | -27° 46' 10.096 | 5.5 | F7V | Simbad |
| IDS 09397-2719 C (GJ 9306 B) | 09h 44m 11.99s | -27° 46' 09.0 | 5.5 | F8V | Simbad |
[edit] References
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