HD 161988

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

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
Distance	600 ± 60 ly (180 ± 20 pc)
Absolute magnitude (MV)	7.296
Details
Mass	0,8 M☉
Radius	0,9 R☉
Luminosity	0,4 L☉
Temperature	3,500–5,000 K
Metallicity	?
Rotation	?
Age	? years
Orbit
Companion	HD 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
SIMBAD	data
Database references
SIMBAD	data

References

• Image HD 161988

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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