Theta Pictoris
Theta Pictoris (θ Pic) is a star in the Pictor constellation.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pictor |
| θ Pic AB | |
| Right ascension | 05h 24m 46.28819s |
| Declination | −52° 18′ 58.4836″ |
| Apparent magnitude (V) | 6.26 |
| θ Pic C | |
| Right ascension | 05h 24m 42.32511s |
| Declination | −52° 18′ 46.9457″ |
| Characteristics | |
| θ Pic AB | |
| Spectral type | A0V (A1III + Am) |
| B−V color index | 0.067±0.004 |
| θ Pic C | |
| Spectral type | A2V |
| Astrometry | |
| θ Pic AB | |
| Radial velocity (Rv) | −3.1±0.8 km/s |
| Proper motion (μ) | RA: −4.00 mas/yr Dec.: −27.71 mas/yr |
| Parallax (π) | 6.36 ± 0.32 mas |
| Distance | 510 ± 30 ly (157 ± 8 pc) |
| Absolute magnitude (MV) | 0.28 |
| θ Pic C | |
| Radial velocity (Rv) | −8.20±3.7 km/s |
| Proper motion (μ) | RA: −5.411 mas/yr Dec.: −27.743 mas/yr |
| Parallax (π) | 6.3027 ± 0.0322 mas |
| Distance | 517 ± 3 ly (158.7 ± 0.8 pc) |
| Details | |
| Luminosity | 68.05 L☉ |
| Other designations | |
| θ Pic AB: θ Pic, CD−52°1198, HD 35860, HIP 25303, HR 1818, SAO 233965, WDS J05248-5219AB | |
| θ Pic C: CPD−52°717, HD 35859, HIP 25298, HR 1818, SAO 233964, WDS J05248-5219C | |
| Database references | |
| θ Pic AB | |
| SIMBAD | data |
| θ Pic C | |
| SIMBAD | data |
Theta Pictoris is a multiple star system: AB: 7.0, 7.5; PA 152°, separation 0.2" C: 7.0; PA 287°, separation 38".
The Theta Pictoris system consists of a total of 4 stars. Theta Pictoris C (HD 35859), an A2V star of about 6.77 magnitude, can be distinguished visually with a small telescope from the main system Theta Pictoris AB; its angular separation from AB is 38.3 arc seconds. Theta Pictoris AB, in turn, consists of a magnitude 6.76 A0V star and a magnitude 7.40 star separated by 0.287" with an orbital period of 123.2 years and eccentricity of 0.692. One of them is also an unresolved spectroscopic binary.
Tet Pic B or HD 35859, Hip 25298, SAO 233964
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