HD 139664

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]

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

References
  1. LTT 6256 -- High proper-motion Star, database entry, SIMBAD. Accessed on line February 4, 2011.
  2. 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, arXiv:astro-ph/0509399, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911.
  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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