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 | Script error: No such module "val".[3] |
| Variable type | Be[4] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "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] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Details | |
| Mass | Script error: No such module "val".[8] Template:Solar mass |
| Radius | 10.0[9] Template:Solar radius |
| Luminosity | Script error: No such module "val".[10] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[10] cgs |
| Temperature | Script error: No such module "val".[10] K |
| Rotation | 2.63 d[11] |
| Rotational velocity (v sin i) | Script error: No such module "val".[12] km/s |
| Age | Script error: No such module "val".[8] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[13] | |
| Database references | |
| SIMBAD | data |
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 Script error: No such module "val". along a position angle of 99°, as of 2015.[18]
References
<templatestyles src="Reflist/styles.css" />
- ↑ Script error: No such module "citation/CS1".
- ↑ a b c d e f Template:Cite Gaia EDR3
- ↑ a b c Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b c d e Script error: No such module "citation/CS1".
- ↑ a b c Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Template:Cite simbad
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "citation/CS1".
Script error: No such module "Check for unknown parameters".