HD 152010

HD 152010

Observation data Epoch J2000      Equinox J2000
Constellation	Apus
Right ascension	16^h 57^m 01.0485^s[1]
Declination	−71° 06′ 41.921″[1]
Apparent magnitude (V)	6.48±0.01[2]
Characteristics
Spectral type	A5 IV/V[3]
U−B color index	+0.15[4]
B−V color index	+0.26[4]
Astrometry
Radial velocity (Rv)	−15.0±0.5[5] km/s
Proper motion (μ)	RA: −8.941[1] mas/yr Dec.: −36.107[1] mas/yr
Parallax (π)	3.2415±0.0204 mas[1]
Distance	1,006 ± 6 ly (308 ± 2 pc)
Absolute magnitude (MV)	−0.95[6]
Details
Mass	2.2[7] M☉
Radius	10.01[8] R☉
Luminosity	193[8] L☉
Surface gravity (log g)	2.85[7] cgs
Temperature	7,155[7] K
Metallicity [Fe/H]	−1.49[7] dex
Rotational velocity (v sin i)	61.5±2.5[9] km/s
Age	179[10] Myr
Other designations
50 G. Apodis, CD−70°1475, CPD−70°2326, GC 22763, HD 152010, HIP 82944, SAO 257446, WDS J16570-7107AB
Database references
SIMBAD	data

HD 152010 is a solitary star in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.48, placing it near the max visibility for the naked eye. Located 1,006 light years^[1]away, the object is approaching the Solar System with a heliocentric radial velocity of −15 km/s.^[5]

This A-type star has either luminosity class intermediate between a subgiant and a main sequence star. At present it has 2.2 times the mass of the Sun but has expanded to 10 times its diameter. It shines at 193 L_☉ from its enlarged photosphere at an effective temperature of 7,155 K, giving it a white glow. HD 152010 is 179 million years old − 2.1% past the main sequence − and spins quickly with a projected rotational velocity of 61.5 km/s. There is a 12th magnitude companion star at an angular separation of 2.9″ along a position angle of 162° (as of 2016).^[11]

References

1. 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.
2. 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.
3. 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_ƒ0. Bibcode:1975mcts.book.....H.
4. Moreno, H.; Carrasco, G. (July 1986). "UBVRI photometry of FK4 and FK4 supplement stars". Astronomy and Astrophysics Supplement Series. 65: 33–39. Bibcode:1986A&AS...65...33M. ISSN 0365-0138.
5. 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. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
6. 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. ISSN 1063-7737. S2CID 255204555.
7. Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M; Minchev, I.; de Jong, R. S.; Antoja, T; Ramos, P. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: 25. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID 131780028.
8. McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433.
9. Ammler-von Eiff, M.; Reiners, A. (June 2012). "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?". Astronomy & Astrophysics. 542: A116. arXiv:1204.2459. Bibcode:2012A&A...542A.116A. doi:10.1051/0004-6361/201118724. ISSN 0004-6361.
10. Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. ISSN 0004-6361. S2CID 55586789.
11. 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. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256.

External links

• Image HD 152010