HD 153053

HD 153053 is double star in the southern constellation of Ara. The brighter component is an A-type main sequence star that may be evolving into a subgiant.[3] It has a twelfth magnitude visual companion at an angular separation of 24.7″ along a position angle of 52°.[7] Mostly likely the two are isolated stars that happen to lie near the same line of sight.[8]

HD 153053
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension  17h 00m 06.27939s[1]
Declination −54° 35′ 49.8371″[1]
Apparent magnitude (V) 5.65[2]
Characteristics
Spectral type A5 IV-V[3]
U−B color index 0.1
B−V color index +0.19[2]
Astrometry
Radial velocity (Rv)-20.2[4] km/s
Proper motion (μ) RA: -7.70[1] mas/yr
Dec.: -72.18[1] mas/yr
Parallax (π)19.30 ± 0.35[1] mas
Distance169 ± 3 ly
(51.8 ± 0.9 pc)
Details
Mass1.8[5] M☉
Luminosity12.3[5] L☉
Temperature8,000[5] K
Rotational velocity (v sin i)102.8±0.7[6] km/s
Age420[5] Myr
Other designations
CPD−54° 7947, HD 153053, HIP 83187, HR 6297, SAO 244338.
Database references
SIMBADdata

This star displays an excess emission of infrared radiation, suggesting the presence of an disk of dusty debris. This disk is orbiting at a radius of 49 AU from the host star.[5]

References
  1. van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J
  3. Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H
  4. 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.
  5. Wyatt, M. C.; et al. (July 2007), "Steady State Evolution of Debris Disks around A Stars", The Astrophysical Journal, 663 (1): 365–382, arXiv:astro-ph/0703608, Bibcode:2007ApJ...663..365W, doi:10.1086/518404.
  6. Díaz, C. G.; et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum", Astronomy & Astrophysics, 531: A143, arXiv:1012.4858, Bibcode:2011A&A...531A.143D, doi:10.1051/0004-6361/201016386
  7. Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
  8. 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x


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