HD 139664

HD 139664

ACS image of debris disk around HD 139664.
Credit: NASA/ESA
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lupus
Right ascension 15h 41m 11.3774s[1]
Declination −44° 39′ 40.338″[1]
Apparent magnitude (V) 4.64[1]
Characteristics
Spectral type F5V[1]
U−B color index −0.03[2]
B−V color index +0.40[2]
R−I color index +0.20[2]
Astrometry
Radial velocity (Rv)−5.4 ± 2[1] km/s
Proper motion (μ) RA: −168.70[1] mas/yr
Dec.: −265.69[1] mas/yr
Parallax (π)57.09 ± 0.72[1] mas
Distance57.1 ± 0.7 ly
(17.5 ± 0.2 pc)
Absolute magnitude (MV)3.57[3]
Details
Mass1.29+0.05
−0.04[4] M☉
Radius0.91[5] R☉
Temperature6600[4] K
Metallicity [Fe/H]−0.11[4] dex
Rotational velocity (v sin i)87[2] km/s
Age1.3+0.7
−0.8[4] Gyr
Other designations
g Lupi, g Lup, CD−44 10310, CPD−44 7529, GC 21070, Gliese 594, GJ 594, HR 5825, HIP 76829, LTT 6256, NLTT 40843, PPM 320883, SAO 226064.[1]
Database references
SIMBADdata

HD 139664 is an F-type main-sequence star in the constellation of Lupus.[1] It has an apparent visual magnitude of approximately 4.64.[1] A debris disk has been imaged around this star using the coronagraphic mode of the ACS instrument on the Hubble Space Telescope. The disk appears to have a dust maximum at 83 AU from the star and a sharp outer boundary at 109 AU. These features may be caused by gravitational perturbations from planets orbiting the star.[6]

References

  1. 1 2 3 4 5 6 7 8 9 10 11 LTT 6256 -- High proper-motion Star, database entry, SIMBAD. Accessed on line February 4, 2011.
  2. 1 2 3 4 HR 5825, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line February 4, 2011.
  3. ↑ Reiners, A. (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, Bibcode:2006A&A...446..267R, arXiv:astro-ph/0509399 Freely accessible, doi:10.1051/0004-6361:20053911.
  4. 1 2 3 4 HD 139664, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line February 4, 2011.
  5. ↑ HD 139664, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line February 4, 2011.
  6. ↑ First Scattered Light Images of Debris Disks around HD 53143 and HD 139664, Paul Kalas et al., The Astrophysical Journal 637, #1 (January 2006), pp. L57-L60, doi:10.1086/500305, Bibcode: 2006ApJ...637L..57K.


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