47 Boötis

From Wikipedia, the free encyclopedia
Jump to: navigation, search
47 Boötis
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 15h 05m 25.8345s
Declination +48° 09′ 03.501″
Apparent magnitude (V) 5.581
Characteristics
Spectral type A1V
U−B color index 0-.07
B−V color index 0.0
Variable type Variable star
Astrometry
Radial velocity (Rv) -13.0 km/s
Proper motion (μ) RA: -65.26 mas/yr
Dec.: 29.71 mas/yr
Parallax (π) 12.55 ± 0.52 mas
Distance 260 ± 10 ly
(80 ± 3 pc)
Absolute magnitude (MV) 5.577
Details
Mass 3,1 M
Radius 2,1 R
Luminosity 40 L
Temperature 7,500–10,000 K
Rotation 59 km/s
0,00494 Year
Orbit
Companion CCDM 15054+4809 B
Semi-major axis (a) 27"
Inclination (i) 202°
Other designations
k Boötis, HR 5627, HD 133962, BD+48°2262, FK5 1395, HIP 73841, SAO 45370, GC 20308, ADS 9500, CCDM 15054+4809.
Database references
SIMBAD data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

47 Boötis or k Boötis is a binary star in the constellation Boötes. It is approximately 260 light years from Earth.

The primary component, 47 Boötis A, is a white A-type main sequence dwarf with an apparent magnitude of +5.59. The companion, 47 Boötis B, is a thirteenth magnitude star located 6.2 arcseconds away from the primary.

References[edit]


Components[edit]

NAME Right ascension Declination Apparent magnitude (V) Spectral type Database references
ADS 9500 B (BD+48 2262B) 15h 05m 25.4s +48° 08' 59 13.3 Simbad