Astronomy:HD 153053

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Short description
Star in the constellation Ara
HD 153053
Observation data
Equinox J2000.0]] (ICRS)
Constellation Ara
Right ascension  17h 00m 06.27939s[1]
Declination −54° 35′ 49.8371″[1]
Apparent magnitude (V) 5.65[2]
Spectral type A5 IV-V[3]
U−B color index 0.1
B−V color index +0.19[2]
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)
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

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]

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]


  1. 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode2007A&A...474..653V. 
  2. 2.0 2.1 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99), Bibcode1966CoLPL...4...99J 
  3. 3.0 3.1 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, 
  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. doi:10.1134/S1063773706110065. Bibcode2006AstL...32..759G. 
  5. 5.0 5.1 5.2 5.3 5.4 Wyatt, M. C. et al. (July 2007), "Steady State Evolution of Debris Disks around A Stars", The Astrophysical Journal 663 (1): 365–382, doi:10.1086/518404, Bibcode2007ApJ...663..365W. 
  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, doi:10.1051/0004-6361/201016386, Bibcode2011A&A...531A.143D 
  7. Mason, B. D. et al. (2014), The Washington Visual Double Star Catalog, doi:10.1086/323920, Bibcode2001AJ....122.3466M,, 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode2008MNRAS.389..869E 

External links