HD 72337, also known as HR 3370, is a solitary,[13] bluish-white hued star located in the southern constellation Volans. With an apparent magnitude of 5.51,[2] it is faintly visible to the unaided eye but only under ideal conditions.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Volans |
| Right ascension | 08h 27m 16.7555s[1] |
| Declination | −70° 05′ 36.541″[1] |
| Apparent magnitude (V) | 5.51±0.01[2] |
| Characteristics | |
| Spectral type | A0 V[3] |
| U−B color index | −0.04[4] |
| B−V color index | −0.03[4] |
| Astrometry | |
| Radial velocity (Rv) | 13±7.4[5] km/s |
| Proper motion (μ) | RA: −18.630 mas/yr[1] Dec.: +45.723 mas/yr[1] |
| Parallax (π) | 11.3465 ± 0.0387 mas[1] |
| Distance | 287.5 ± 1.0 ly (88.1 ± 0.3 pc) |
| Absolute magnitude (MV) | +0.85[6] |
| Details | |
| Mass | 2.51±0.07[7] M☉ |
| Radius | 2.26±0.06[8] R☉ |
| Luminosity | 42.5[9] L☉ |
| Surface gravity (log g) | 4.15[10] cgs |
| Temperature | 10,251±384[11] K |
| Rotational velocity (v sin i) | 149[10] km/s |
| Age | 265[10] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Velocity
editBased on recent parallax measurements from the Gaia spacecraft, HD 72337 is currently located at a distance of 287 light years.[1] The object made its closest approach 1.914 million years ago when it was 234 light years distant.[6] At that distance, it brightened slightly to an apparent magnitude of 5.13.[6] Currently, HR 3370 is receding with a heliocentric radial velocity of 10.7 km/s.[5]
Properties
editThe stellar classification of HD 72337 is A0 V,[3] indicating that it is an ordinary A-type main-sequence star. It has 2.25 times the radius of the Sun[8] and a mass of 2.51 M☉.[7] It radiates at 42.5 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 10,251 K.[11] Like many hot stars, HD 72337 rotates rapidly with a projected rotational velocity of 149 km/s, and is estimated to be 265 million years old.[10]
References
edit- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
- ^ a b Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53°. Bibcode:1975mcts.book.....H.
- ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
- ^ a b Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 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): 889–896. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. eISSN 1521-3994. ISSN 0004-6337. S2CID 119323941.
- ^ a b c Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
- ^ a b Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. ISSN 0004-6361.
- ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881.
- ^ a b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. eISSN 1365-2966. ISSN 0035-8711.
- ^ a b c d David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. eISSN 1538-4357.
- ^ a b Paunzen, E.; Schnell, A.; Maitzen, H. M. (October 2006). "An empirical temperature calibration for the Δa photometric system II: The A-type and mid F-type stars". Astronomy & Astrophysics. 458 (1): 293–296. arXiv:astro-ph/0607567. Bibcode:2006A&A...458..293P. doi:10.1051/0004-6361:20064889. eISSN 1432-0746. ISSN 0004-6361.
- ^ "HD 72337". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved August 7, 2022.
- ^ Eggleton, P. P.; Tokovinin, A. A. (11 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. eISSN 1365-2966. ISSN 0035-8711.