Astronomy:10 Trianguli

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Short description: Star in the constellation Triangulum
10 Trianguli
Triangulum IAU.svg
Red circle.svg
Location of 10 Trianguli (circled)
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Triangulum
Right ascension  02h 18m 56.99355s[1]
Declination +28° 38′ 33.6322″[1]
Apparent magnitude (V) 5.29±0.01[2]
Characteristics
Evolutionary stage main sequence star[3]
Spectral type A2 V[4][5]
U−B color index +0.02[6]
B−V color index +0.04[6]
Astrometry
Radial velocity (Rv)0.4±0.1[7] km/s
Proper motion (μ) RA: +7.073[1] mas/yr
Dec.: +0.836[1] mas/yr
Parallax (π)8.9971 ± 0.0729[1] mas
Distance363 ± 3 ly
(111.1 ± 0.9 pc)
Absolute magnitude (MV)−0.02[8]
Details
Mass2.83±0.05[3] M☉
Radius3.71±0.19[9] R☉
Luminosity108+10−9[3] L☉
Surface gravity (log g)3.73[10] cgs
Temperature9,023[11] K
Metallicity [Fe/H]+0.33[12] dex
Rotational velocity (v sin i)22±2[13] km/s
Age372±44[14][15] Myr
Other designations
1 H. Trianguli Minus,[16] 10 Tri, BD+27°360, GC 2781, HD 14252, HIP 10793, HR 675, SAO 75276
Database references
SIMBADdata

10 Trianguli (HD 14252; HR 675; 1 H. Trianguli Minus), or simply 10 Tri is a solitary star[17] located in the northern constellation Triangulum. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.29.[2] Gaia DR3 parallax measurements imply a distance of 363 light-years [1] and it is slowly receding with a heliocentric radial velocity of 0.4 km/s.[7] At its current distance, 10 Tri's brightness is diminished by an interstellar extinction of 0.11 magnitudes[18] and it has an absolute magnitude of −0.02.[8]

10 Trianguli has a stellar classification of A2 V,[4][5] indicating that it is an ordinary A-type main-sequence star that is generating energy via hydrogen fusion at its core. It has 2.83 times the mass of the Sun[3] and a slightly enlarged radius 3.71 times that of the Sun.[9] It radiates 108 times the luminosity of the Sun[3] from its photosphere at an effective temperature of 9,023 K.[11] 10 Trianguli is rather evolved for its class, having completed 92.5% of its main sequence lifetime[3] at the age of 372 million years.[14][15] It is metal enriched with an iron abundance of [Fe/H] = +0.33 or % of the Sun's[12] and unlike most hot stars, it spins modestly with a projected rotational velocity of 22 km/s.[13]

10 Trianguli has a 13th magnitude companion located 58.3" away along a position angle of 205°.[19] It is an unrelated background star that is much more distant than 10 Trianguli.[20] Together with ι Trianguli and 12 Trianguli, it forms part of the obsolete Triangulum Minus.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars IV: Evolution of rotational velocities". Astronomy & Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. ISSN 0004-6361. Bibcode: 2012A&A...537A.120Z. 
  4. ↑ 4.0 4.1 Osawa, Kiyoteru (July 1959). "Spectral Classification of 533 B8-A2 Stars and the Mean Absolute Magnitude of A0 V Stars.". The Astrophysical Journal (American Astronomical Society) 130: 159. doi:10.1086/146706. ISSN 0004-637X. Bibcode: 1959ApJ...130..159O. 
  5. ↑ 5.0 5.1 Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (April 1969). "A study of the bright stars. I. A catalogue of spectral classifications.". The Astronomical Journal 74: 375. doi:10.1086/110819. ISSN 0004-6256. Bibcode: 1969AJ.....74..375C. 
  6. ↑ 6.0 6.1 Osawa, K.; Hata, S. (1960). "Three colour photometry of B8-A2 stars.". Annals of the Tokyo Astronomical Observatory 6: 148. Bibcode: 1960AnTok...6..148O. 
  7. ↑ 7.0 7.1 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  8. ↑ 8.0 8.1 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  9. ↑ 9.0 9.1 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (April 8, 2004). "The angular sizes of dwarf stars and subgiants: Surface brightness relations calibrated by interferometry". Astronomy & Astrophysics 426 (1): 297–307. doi:10.1051/0004-6361:20035930. ISSN 0004-6361. Bibcode: 2004A&A...426..297K. 
  10. ↑ Philip, A. G. D.; Egret, D. (May 1980). "An analysis of the Hauck-Mermillod catalogue of homogeneous four-color data. II.". Astronomy and Astrophysics Supplement Series 40: 199–205. ISSN 0365-0138. Bibcode: 1980A&AS...40..199P. 
  11. ↑ 11.0 11.1 Takeda, Yoichi; Han, Inwoo; Kang, Dong-Il; Lee, Byeong-Cheol; Kim, Kang-Min (May 1, 2019). "Compositional differences between the component stars of eclipsing close binary systems showing chemical peculiarities". Monthly Notices of the Royal Astronomical Society 485 (1): 1067–1084. doi:10.1093/mnras/stz449. ISSN 0035-8711. Bibcode: 2019MNRAS.485.1067T. 
  12. ↑ 12.0 12.1 Gebran, M.; Farah, W.; Paletou, F.; Monier, R.; Watson, V. (18 April 2016). "A new method for the inversion of atmospheric parameters of A/Am stars". Astronomy & Astrophysics 589: A83. doi:10.1051/0004-6361/201528052. ISSN 0004-6361. Bibcode: 2016A&A...589A..83G. 
  13. ↑ 13.0 13.1 Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. (October 2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i". Astronomy & Astrophysics 393 (3): 897–911. doi:10.1051/0004-6361:20020943. ISSN 0004-6361. Bibcode: 2002A&A...393..897R. 
  14. ↑ 14.0 14.1 Gontcharov, G. A. (November 2012). "Spatial distribution and kinematics of OB stars". Astronomy Letters 38 (11): 694–706. doi:10.1134/S1063773712110035. ISSN 1063-7737. Bibcode: 2012AstL...38..694G. 
  15. ↑ 15.0 15.1 Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters 38 (12): 771–782. doi:10.1134/S1063773712120031. ISSN 1063-7737. Bibcode: 2012AstL...38..771G. 
  16. ↑ Verbunt, F.; van Gent, R. H. (June 2010). "The star catalogue of Hevelius: Machine-readable version and comparison with the modern Hipparcos Catalogue". Astronomy and Astrophysics 516: A29. doi:10.1051/0004-6361/201014003. ISSN 0004-6361. Bibcode: 2010A&A...516A..29V. 
  17. ↑ 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. 
  18. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society 472 (4): 3805–3820. doi:10.1093/mnras/stx2219. ISSN 0035-8711. Bibcode: 2017MNRAS.472.3805G. 
  19. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (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. ISSN 0004-6256. Bibcode: 2001AJ....122.3466M. 
  20. ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.



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