Astronomy:Theta Pictoris

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Short description: Star in the constellation Pictor
Theta Pictoris
Observation data
{{#ifeq:J2000.0|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| [[History:Epoch|Epoch J2000.0]]      [[Astronomy:Equinox (celestial coordinates)|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]
Apparent magnitude (V)
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[1] mas
Distance510 ± 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[3] mas
Distance517 ± 3 ly
(158.7 ± 0.8 pc)
Details
Luminosity68.05[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
SIMBADdata
θ Pic C
SIMBADdata

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

  1. ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  2. ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  4. ↑ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H. 
  5. ↑ 5.0 5.1 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, doi:10.1051/0004-6361/201322840, A138, Bibcode: 2014A&A...563A.138V. 
  6. ↑ 6.0 6.1 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, doi:10.1002/asna.200710776, Bibcode: 2007AN....328..889K. 
  7. ↑ 7.0 7.1 "tet Pic". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=tet+Pic. 
  8. ↑ 8.0 8.1 "HD 35859". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+35859. 
  9. ↑ 9.0 9.1 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. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E. 
  10. ↑ 10.0 10.1 Mason, Brian D. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466–3471. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M. 
  11. ↑ 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. doi:10.1051/0004-6361/201219774. Bibcode: 2012A&A...546A..69M. 




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