Theta Pictoris
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pictor |
| θ Pic AB | |
| Right ascension | 05h 24m 46.28819s[1] |
| Declination | −52° 18′ 58.4836″[1] |
| Apparent magnitude (V) | 6.26[2] |
| θ Pic C | |
| Right ascension | 05h 24m 42.32511s[3] |
| Declination | −52° 18′ 46.9457″[3] |
| Characteristics | |
| θ Pic AB | |
| Spectral type | A0V[4] (A1III + Am)[5] |
| B−V color index | 0.067±0.004[2] |
| θ Pic C | |
| Spectral type | A2V[5] |
| Astrometry | |
| θ Pic AB | |
| Radial velocity (Rv) | −3.1±0.8[6] km/s |
| Proper motion (μ) | RA: −4.00[1] mas/yr Dec.: −27.71[1] mas/yr |
| Parallax (π) | 6.36 ± 0.32 mas[1] |
| Distance | 510 ± 30 ly (157 ± 8 pc) |
| Absolute magnitude (MV) | 0.28[2] |
| θ Pic C | |
| Radial velocity (Rv) | −8.20±3.7[6] km/s |
| Proper motion (μ) | RA: −5.411[3] mas/yr Dec.: −27.743[3] mas/yr |
| Parallax (π) | 6.3027 ± 0.0322 mas[3] |
| Distance | 517 ± 3 ly (158.7 ± 0.8 pc) |
| Details | |
| Luminosity | 68.05[2] L☉ |
| Other designations | |
| θ Pic AB: θ Pic, CD−52°1198, HD 35860, HIP 25303, HR 1818, SAO 233965, WDS J05248-5219AB[7] | |
| θ Pic C: CPD−52°717, HD 35859, HIP 25298, HR 1818, SAO 233964, WDS J05248-5219C[8] | |
| Database references | |
| θ Pic AB | |
| SIMBAD | data |
| θ Pic C | |
| SIMBAD | data |
Theta Pictoris (θ Pic) is a star in the Pictor constellation.
Theta Pictoris is a multiple star system:[citation needed] 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.[9] Theta Pictoris C (HD 35859), an A2V star of about 6.77 magnitude,[8] 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.[10] Theta Pictoris AB, in turn, consists of a magnitude 6.76 A0V star[7] and a magnitude 7.40 star separated by 0.287" with an orbital period of 123.2 years and eccentricity of 0.692.[10][11] One of them is also an unresolved spectroscopic binary.[9]
Tet Pic B or HD 35859, Hip 25298, SAO 233964
References
[edit]- ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ a b c d Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ a b Veramendi, M. E.; González, J. F. (March 2014), "Spectroscopic study of early-type multiple stellar systems. I. Orbits of spectroscopic binary subsystems", Astronomy & Astrophysics, 563: 15, Bibcode:2014A&A...563A.138V, doi:10.1051/0004-6361/201322840, hdl:11336/4892, A138.
- ^ a b Kharchenko, N. V.; et al. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten, 328 (9): 889, arXiv:0705.0878, Bibcode:2007AN....328..889K, doi:10.1002/asna.200710776, S2CID 119323941.
- ^ a b "tet Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-02.
{{cite web}}: CS1 maint: postscript (link) - ^ a b "HD 35859". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-02.
{{cite web}}: CS1 maint: postscript (link) - ^ a b Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
- ^ a b Mason, Brian D.; et al. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
- ^ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (October 2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: article 69, 5 pp. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774.
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