1 Canis Minoris

1 Canis Minoris
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Canis Minor
Right ascension 07h 24m 58.17971s[1]
Declination +11° 40′ 10.2843″[1]
Apparent magnitude (V) 5.37[2]
Characteristics
Spectral type A5 IV[3] or A4 V[4]
B−V color index 0.105±0.006[2]
Astrometry
Radial velocity (Rv)−1.0±4.2[2] km/s
Proper motion (μ) RA: −15.263[1] mas/yr
Dec.: −15.625[1] mas/yr
Parallax (π)11.3473 ± 0.1958 mas[1]
Distance287 ± 5 ly
(88 ± 2 pc)
Absolute magnitude (MV)0.44[2]
Details
Mass2.15[5] M☉
Radius4.6[6] R☉
Luminosity66.3+3.8
−3.6[7] L☉
Surface gravity (log g)3.87[5] cgs
Temperature8,374±285[5] K
Rotational velocity (v sin i)159[7] km/s
Age716[5] Myr
Other designations
1 CMi, BD+11°1578, GC 9891, HD 58187, HIP 35987, HR 2820, SAO 96871[8]
Database references
SIMBADdata

1 Canis Minoris is a single[9] star in the equatorial constellation of Canis Minor, located about 287 light years away from the Sun. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 5.37.[2] The radial velocity of this object is poorly constrained at −1.0±4.2 km/s.[2]

Cowley et al. (1969) listed a stellar classification of A5 IV[3] for 1 Canis Minoris, matching an A-type subgiant star that has exhausted the hydrogen at its core and is evolving into a giant. However, Gray and Garrison (1989) catalogued it as an A-type main-sequence star with a class of A4 V.[4] The Hipparcos team used a class of A3 Vn,[2] where the 'n' indicates "nebulous" lines due to rapid rotation.

This star is estimated to be 716[5] million years old and is at or near the end of its main sequence lifetime.[7] It has a high rate of spin, showing a projected rotational velocity of 159 km/s.[7] The star has more than double[5] the mass of the Sun with about 4.6[6] times the Sun's radius. It is radiating 66[7] times the Sun's luminosity from its photosphere at an effective temperature of 8,374 K.[5]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gray1989 was invoked but never defined (see the help page).
  5. ^ a b c d e f g Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).