HD 180450
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 5.88[1] |
| Characteristics | |
| Evolutionary stage | AGB[3] |
| Spectral type | M1IIIab[1] |
| U−B Template:Engvar | +2.03 |
| B−V Template:Engvar | Script error: No such module "val".[1] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[2] km/s |
| Proper motion (μ) | RA: 34.425[2] mas/yr Dec.: −26.081[2] mas/yr |
| Parallax (π) | 2.37±0.61 mas[2] |
| Distance | approx. Template:Rnd ly (approx. Template:Rnd pc) |
| Absolute magnitude (MV) | −2.03[1] |
| Details | |
| Mass | 1.4[4] Template:Solar mass |
| Radius | 84[5] Template:Solar radius |
| Luminosity | 1,218[5] Template:Solar luminosity |
| Surface gravity (log g) | 1.58[4] cgs |
| Temperature | 3,733[5] K |
| Metallicity [Fe/H] | −0.23[4] dex |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[6] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
HD 180450 is a single[7] star in the northern constellation of Lyra, positioned about half a degree to the NNW of the globular cluster M56.[8] At an apparent visual magnitude of 5.88,[1] it is dimly visible to the naked eye under good viewing conditions. This star is located at a distance of approximately 1,400 light years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −64.4 km/s.[2]
This is an aging red giant star with a stellar classification of M1IIIab,[1] It is currently on the asymptotic giant branch,[9] having exhausted the supply of hydrogen in its core and evolved of the main sequence. It has expanded to ~68 times the radius of the Sun and is radiating a thousand times the Sun' luminosity from its enlarged photosphere at en effective temperature of 3,947 K.[2]
References
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- ↑ a b c d e f g Template:Cite XHIP
- ↑ a b c d e f g h Template:Cite Gaia DR2
- ↑ Script error: No such module "Citation/CS1".
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ a b c 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 "Check for unknown parameters".