10 Canis Majoris

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Template:Short description

10 Canis Majoris
File:FTCMaLightCurve.png
A light curve for FT Canis Majoris from Hipparcos data, adapted from Lefèvre et al. (2009)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Canis Major
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.23[3] (5.13–5.44)[4]
Characteristics
Spectral type B2 V[5] or B2 IIIe[6]
B−V Template:Engvar Template:Val[3]
Variable type Be[4]
Astrometry
Radial velocity (Rv)Template:Val[7] km/s
Proper motion (μ) RA: −3.286[2] mas/yr
Dec.: +4.201[2] mas/yr
Parallax (π)1.6454±0.0722 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Details
MassTemplate:Val[8] Template:Solar mass
Radius10.0[9] Template:Solar radius
LuminosityTemplate:Val[10] Template:Solar luminosity
Surface gravity (log g)Template:Val[10] cgs
TemperatureTemplate:Val[10] K
Rotation2.63 d[11]
Rotational velocity (v sin i)Template:Val[12] km/s
AgeTemplate:Val[8] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[13]
Database references
SIMBADdata

Script error: No such module "Check for unknown parameters".

10 Canis Majoris is a single[14] variable star in the southern constellation of Canis Major,[13] located roughly 1,980 light years away from the Sun.[2] It has the variable star designation FT Canis Majoris; 10 Canis Majoris is the Flamsteed designation. This body is visible to the naked eye as a faint, blue-white hued star with a baseline apparent visual magnitude of 5.23.[3] It is moving away from the Earth with a heliocentric radial velocity of +34 km/s.[7]

This is a massive Be star[9] with a stellar classification of B2 V,[5] matching a B-type main-sequence star. Hiltner et al. (1969) found a giant class of B2 IIIe,[6] which is still in use with some studies.[14][4] The star is spinning rapidly with a projected rotational velocity of 205 km/s[12] and a rotational period of 2.63 days.[11] This is giving it an oblate shape with an equatorial bulge that is 5% larger than the polar radius.[15] The axis of rotation is inclined by an angle of 45° to the line of sight from the Earth.[9]

In 1968, Alejandro Feinstein announced that the star is variable, based on observations from 1963-1965.[16] It was given its variable star designation in 1973.[17] Samus et al. (2017) classify it as a Be-type variable star that ranges from a peak visual magnitude of 5.13 down to 5.44 with a rotationally-modulated period of 2.63 days.[4][11]

10 Canis Majoris is 8.2[8] million years old with 19.2[8] times the mass of the Sun and 10[9] times the Sun's radius. It is radiating around 44,000[10] times the luminosity of the Sun from its photosphere at an effective temperature of 25,000 K.[10] There is a magnitude 12.58 visual companion at an angular separation of Template:Val along a position angle of 99°, as of 2015.[18]

References

Template:Reflist

Template:Stars of Canis Major

  1. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Lefèvre
  2. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named GaiaEDR3
  3. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  4. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Samus2017
  5. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named houk1979
  6. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Hiltner1969
  7. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named deBruijne2012
  8. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Tetzlaff2011
  9. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Zorec2007
  10. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named Zorec2016
  11. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Balona1992
  12. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Chauville2001
  13. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
  14. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Eggleton2008
  15. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named vanBelle2012
  16. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Feinstein1968
  17. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Kukarkin1973
  18. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named WDSC2014
Retrieved from "http://debianws.lexgopc.com/wiki143/index.php?title=10_Canis_Majoris&oldid=2083031"