Theta Canis Majoris
Template:Location mark Location of θ Canis Majoris (circled) | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Canis Major |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.08[2] |
| Characteristics | |
| Evolutionary stage | Red giant branch[3] |
| Spectral type | K4 III[2] |
| U−B Template:Engvar | +1.69[4] |
| B−V Template:Engvar | +1.43[4] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[5] km/s |
| Proper motion (μ) | RA: −136.454 mas/yr[1] Dec.: −14.322 mas/yr[1] |
| Parallax (π) | 12.0676±0.62 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)[1] |
| Absolute magnitude (MV) | Script error: No such module "val".[6] |
| Details[5] | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val".[7] Template:Solar radius |
| Luminosity | Script error: No such module "val".[7] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val". cgs |
| Temperature | Script error: No such module "val".[7] K |
| Metallicity [Fe/H] | Script error: No such module "val". dex |
| Rotational velocity (v sin i) | Script error: No such module "val". km/s |
| Age | Script error: No such module "val". Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
Theta Canis Majoris (θ Canis Majoris) is a solitary,[9] orange-hued star near the northern edge[10] of the constellation Canis Major, forming the nose of the "dog".[11] The star is visible to the naked eye with an apparent visual magnitude of 4.08.[2] Based upon an annual parallax shift of 12.07 mas as seen from Earth,[1] it is located about 270 light years from the Sun. The star is moving away from Earth with a radial velocity of +96.2 km/s.[5]
This is a evolved K-type giant star with a stellar classification of K4 III.[2] Theta Canis Majoris is 5% less massive than the Sun,[5] but has expanded to 33 times the Sun's size.[7] This old star, around ten billion years old,[5] is over two times older than the Solar System.[12] It irradiates 305 times the Sun's luminosity from its expanded photosphere at an effective temperature of 4,200 K.[7] This temperature gives it the cool orange hue of a K-type star.[13]
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b c d e f Template:Cite Gaia DR3
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c d e Script error: No such module "citation/CS1". Theta Canis Majoris' database entry at VizieR.
- ↑ Script error: No such module "citation/CS1".
- ↑ a b c d e Script error: No such module "citation/CS1".
- ↑ Template:Cite simbad
- ↑ 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".