HR 5825

HR 5825

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
Distance	57.1 ± 0.7 ly (17.5 ± 0.2 pc)
Absolute magnitude (MV)	3.42[3]
Details
Mass	1.29 (1.25 to 1.34)[4] M☉
Radius	0.91[5] R☉
Temperature	6600[4] K
Metallicity	[Fe/H] = −0.11[4]
Rotational velocity (v sin i)	87[2] km/s
Age	1.3 (0.5 to 2.0) × 109[4] years
Other designations
g Lupi, g Lup, CD−44 10310, CPD−44 7529, GC 21070, Gliese 594, GJ 594, HD 139664, HIP 76829, LTT 6256, NLTT 40843, PPM 320883, SAO 226064.[1]
Database references
SIMBAD	data

HR 5825 is a 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. ^ ^{a b c d e f g h i j k} LTT 6256 -- High proper-motion Star, database entry, SIMBAD. Accessed on line February 4, 2011.
2. ^ ^{a b c d} 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. ^ From apparent magnitude and parallax.
4. ^ ^{a b c d} 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.