HD 39225
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 5.82–6.07[3] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | M1+III Fe-1[5] |
| U−B Template:Engvar | 1.97 |
| B−V Template:Engvar | Script error: No such module "val". |
| Variable type | suspected[3] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[2] km/s |
| Proper motion (μ) | RA: +17.953[2] mas/yr Dec.: +9.174[2] mas/yr |
| Parallax (π) | 4.9537±0.0893 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −0.77[1] |
| Details | |
| Mass | 3.7[6] Template:Solar mass |
| Radius | 51[7] Template:Solar radius |
| Luminosity | 411[7] Template:Solar luminosity |
| Surface gravity (log g) | 1.61[8] cgs |
| Temperature | 3,643[7] K |
| Age | 865[8] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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HD 39225, also known as HR 2028, is a variable star in the northern constellation Auriga, located around 620 light years away from the Sun. It is visible to the naked eye as a faint, red-hued star with an apparent visual magnitude of around 6.[3] This is a suspected runaway star[10] that is moving away from the Sun with a heliocentric radial velocity of 99 km/s.[2]
Currently on the asymptotic giant branch,[4] this is an evolved red giant star with a stellar classification of M1+III Fe-1.[5] The suffix notation indicates an underabundance of iron in the stellar atmosphere compared to similar stars of its class. It is suspected of varying in brightness between magnitudes 5.82 and 6.07.[3] Having exhausted the hydrogen at its core, it has expanded to around 51 times the Sun's radius.[7] It shines with a luminosity approximately 411 times that of the Sun and has a surface temperature of Script error: No such module "val"..[7]
References
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- ↑ a b Template:Cite XHIP
- ↑ a b c d e f g Template:Cite DR3
- ↑ a b c d Script error: No such module "citation/CS1".
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- ↑ a b c d e Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ Template:Cite simbad
- ↑ Script error: No such module "Citation/CS1".
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