Procyon A/B

The position of Procyon
Observation data
Epoch J2000      Equinox J2000
Constellation Canis Minor
Pronunciation  /ˈprsi.ɒn/
Right ascension 07
Declination +05° 13′ 29.9552″
Apparent magnitude (V) 0.34 (A) / 10.7 (B)
Characteristics
Spectral type F5 IV-V/DA
U−B color index −0.01
B−V color index 0.40/0.0
Astrometry
Radial velocity (Rv) −3.2 km/s
Proper motion (μ) RA: −714.590 mas/yr
Parallax (π) 284.56 ± 1.26mas
Distance 11.46 ± 0.05 ly
(3.51 ± 0.02 pc)
Absolute magnitude (MV) 2.65/13.04
Details
Procyon A
Mass 1.42 ± 0.04M
Radius 2.048 ± 0.025R
Luminosity 6.93L
Surface gravity (log g) 3.96
Temperature 6,530 ± 50K
Metallicity [Fe/H] -0.05 ± 0.03dex
Rotation 23 days
Rotational velocity (v sin i) 3.16 ± 0.50 km/s
Age 3Gyr
Procyon B
Mass 0.602 ± 0.015M
Radius 0.01234 ± 0.00032R
Luminosity 0.00055 L
Surface gravity (log g) 8.0
Temperature 7,740 ± 50K
Orbit
Companion Procyon B
Period (P) 40.82 yr
Semimajor axis (a) 1.232"
Eccentricity (e) 0.407
Inclination (i) 31.1°
Longitude of the node (Ω) 97.3°
Periastron epoch (T) 1967.97
Argument of periastron (ω)
(secondary)
92.2°
Other designations
α Canis Minoris, 10 Canis Minoris, GCTP 1805.00, HR 2943, BD+05°1739, HD 61421, LHS 233, GJ 280, HIP 37279.
Database references
SIMBAD data

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Procyon, which is released under the Creative Commons Attribution-Share-Alike License 3.0