- Nu² Boötis
-
ν2 Boötis Observation data
Epoch J2000 Equinox J2000Constellation 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/yrParallax (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 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
Categories:- Flamsteed objects
- Bayer objects
- Henry Draper Catalogue objects
- HIP objects
- Boötes constellation
- Spectroscopic binaries
- A-type main sequence stars
- Multiple star stubs
Wikimedia Foundation. 2010.