Astronomy:HD 219659

HD 219659
Observation data; Equinox J2000.0]] (ICRS)
Constellation	Aquarius
Right ascension	23h 17m 40.08278s
Declination	−11° 42′ 46.5910″
Apparent magnitude (V)	6.33
Characteristics
Spectral type	A1/A2IV/V
U−B color index	+0.00
B−V color index	+0.05
Astrometry
Radial velocity (Rv)	2.2 km/s
Proper motion (μ)	RA: +40.58 mas/yr ; Dec.: +5.32 mas/yr
Parallax (π)	8.24 ± 0.53 mas
Distance	400 ± 30 ly ; (121 ± 8 pc)
Details
Radius	1.9 R☉
Rotational velocity (v sin i)	196 km/s
Other designations
	BD-12° 6461, HD 219659, HIP 115015, HR 8856, SAO 165609.
Database references
SIMBAD	data

Short description: Suspected variable star in the constellation Aquarius

HD 219659 is suspected variable star in the equatorial constellation of Aquarius.

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
↑ ^2.0 ^2.1 ^2.2 Alexander, J. B.; Carter, B. S. (1971), "Motion of A0 stars perpendicular to the galactic plane. V. (U, B, V) photometry of A stars in the south galactic cap.", Royal Observatory Bulletin, Greenwich-Cape 169 (169): 353–361, Bibcode: 1971RGOB..169..351A
↑ Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1988mcts.book.....H
↑ 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. Bibcode: 2006AstL...32..759G.
↑ Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P
↑ Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics 463 (2): 671–682, doi:10.1051/0004-6361:20065224, Bibcode: 2007A&A...463..671R

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Observation data Equinox J2000.0]] (ICRS)
Constellation	Aquarius
Right ascension	23^h 17^m 40.08278^s^[1]
Declination	−11° 42′ 46.5910″^[1]
Apparent magnitude (V)	6.33^[2]
Characteristics
Spectral type	A1/A2IV/V^[3]
U−B color index	+0.00^[2]
B−V color index	+0.05^[2]
Astrometry

Radial velocity (R_v)	2.2^[4] km/s
Proper motion (μ)	RA: +40.58^[1] mas/yr Dec.: +5.32^[1] mas/yr
Parallax (π)	8.24 ± 0.53^[1] mas
Distance	400 ± 30 ly (121 ± 8 pc)

Details

Radius	1.9^[5] `R`_☉
Rotational velocity (v sin i)	196^[6] km/s

Other designations
BD-12° 6461, HD 219659, HIP 115015, HR 8856, SAO 165609.
Database references
SIMBAD	data