Nu² Boötis

ν² Boötis

Observation data Epoch J2000      Equinox J2000
Constellation	Boötes
Right ascension	15h 31m 46.9817s
Declination	+40° 53′ 57.597″
Apparent magnitude (V)	4.997
Characteristics
Spectral type	A5V
U−B color index	0.11
B−V color index	0.07
R−I color index	0.04
Astrometry
Radial velocity (Rv)	-16.6 km/s
Proper motion (μ)	RA: -13.73 mas/yr Dec.: -14.92 mas/yr
Parallax (π)	7.59 ± 0.55 mas
Distance	430 ± 30 ly (132 ± 10 pc)
Absolute magnitude (MV)	5.093
Details
Mass	3.1 M☉
Radius	2.1 R☉
Luminosity	40 L☉
Temperature	7,500–10,000 K
Rotational velocity (v sin i)	182 km/s
Other designations
53 Boötis, HR 5774, HD 138629, BD+41°2611, HIP 76041, SAO 45590, GC 20883, ADS 9688, CCDM 15318+4054.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)
Database references
SIMBAD	data

Nu² Boötis is a spectroscopic binary approximately 430 light years from Earth. The primary component, ν² Boötis A, is a white A-type main sequence dwarf with an apparent magnitude of +4.98. Its companion, ν² Boötis B is separated from the primary by less than 0.1 arcseconds. The binary has an orbital period of 8.48 years.

References

• HR 5774
• CCDM J15318+4054
• Nu² Boötis