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HD 161988

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This is an old revision of this page, as edited by Cydebot (talk | contribs) at 18:36, 13 March 2010 (Robot - Moving category HD and HDE objects to Henry Draper Catalogue objects per CFD at Wikipedia:Categories for discussion/Log/2010 February 23.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

HD 161988

HD 161988
Observation data
Epoch J2000      Equinox J2000
Constellation Apus
Right ascension 17h 57m 41.685s
Declination -76° 10′ 40.618″
Apparent magnitude (V) 6.072
Characteristics
Spectral type K2III
U−B color index 1.28
B−V color index 1.2
Astrometry
Radial velocity (Rv)37 km/s
Proper motion (μ) RA: 1.16 mas/yr
Dec.: -1.34 mas/yr
Parallax (π)5.48 ± 0.54 mas
Distance600 ± 60 ly
(180 ± 20 pc)
Absolute magnitude (MV)7.296
Details
Mass0,8 M
Radius0,9 R
Luminosity0,4 L
Temperature3,500–5,000 K
Metallicity?
Rotation?
Age? years
Orbit
CompanionHD 161988 B
Semi-major axis (a)25.5″
Inclination (i)120°
Other designations
CSI-76° 1226 41, HIP 87926, SAO 257542, CCDM J17577-7611A, GC 24315, HR 6635, CD-76° 919, IDS 17435-7609 A, TYC 9444-2623-1, CPC 21.2 2846, GSC 09444-02623, N30 3978, UBV M 22420, CPD-76° 1226, HIC 87926, PPM 373648, UBV 15161.
Database references
SIMBADdata
Database references
SIMBADdata

HD 161988 or IDS+17435-7609 A is star in double system.

References

Components

NAME Right ascension Declination Apparent magnitude (V) Spectral type Database references
IDS+17435-7609 B (CPD-76 1226B) 17h 57m 47.9s -76° 10' 50 14.0 Simbad


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