Astronomy:HD 72337
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas/yr Dec.: +45.723[1] mas/yr |
| Parallax (π) | 11.3465 ± 0.0387[1] mas |
| 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 |
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.
Velocity
Based 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
The 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
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 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.
- ↑ 3.0 3.1 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.
- ↑ 4.0 4.1 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.
- ↑ 5.0 5.1 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. doi:10.1002/asna.200710776. ISSN 0004-6337. Bibcode: 2007AN....328..889K.
- ↑ 6.0 6.1 6.2 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.
- ↑ 7.0 7.1 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. ISSN 0004-6361. Bibcode: 1999A&A...352..555A.
- ↑ 8.0 8.1 Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ 9.0 9.1 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. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711. Bibcode: 2012MNRAS.427..343M.
- ↑ 10.0 10.1 10.2 10.3 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. doi:10.1088/0004-637X/804/2/146. Bibcode: 2015ApJ...804..146D.
- ↑ 11.0 11.1 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. doi:10.1051/0004-6361:20064889. ISSN 0004-6361. Bibcode: 2006A&A...458..293P.
- ↑ "HD 72337". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+72337.
- ↑ 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. doi:10.1111/j.1365-2966.2008.13596.x. ISSN 0035-8711. Bibcode: 2008MNRAS.389..869E.
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