β Ursae Majoris

Merak in Ursa Major.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Major
Right ascension 11
Declination +56° 22′ 56.7339″
Apparent magnitude (V) +2.37
Characteristics
Spectral type A1 V
U−B color index +0.00
B−V color index -0.02
Variable type Suspected
Astrometry
Radial velocity (Rv) -12.0 km/s
Proper motion (μ) RA: +81.43 mas/yr
Parallax (π) 40.90 ± 0.16mas
Distance 79.7 ± 0.3 ly
(24.45 ± 0.10 pc)
Details
Mass 2.7M
Radius 3.021 ± 0.038R
Luminosity 63.015 ± 1.307L
Surface gravity (log g) 3.83
Temperature 9377 ± 75K
Rotational velocity (v sin i) 46 km/s
Age 500 ± 100Myr
Other designations
Merak, Mirak,

Get more info about Merak in Wikipedia

This article uses material from the Wikipedia article
Merak, which is released under the Creative Commons Attribution-Share-Alike License 3.0