Nu2 Boötis

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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
Spectral type A5V
U−B color index 0.11
B−V color index 0.07
R−I color index 0.04
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
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
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)
Database references

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.