Kappa Lyrae
Template:Location mark Location of κ Lyrae (circled) | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.33[2] |
| Characteristics | |
| Evolutionary stage | red clump[3] |
| Spectral type | K2-IIIabCN0.5[4] |
| U−B Template:Engvar | +1.17[5] |
| B−V Template:Engvar | Script error: No such module "val".[2] |
| Variable type | suspected[6] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[7] km/s |
| Proper motion (μ) | RA: −16.75[1] mas/yr Dec.: +41.09[1] mas/yr |
| Parallax (π) | 12.96±0.14 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −0.11[2] |
| Details | |
| Radius | 18[7] Template:Solar radius |
| Luminosity | 127.4[8] Template:Solar luminosity |
| Surface gravity (log g) | 2.51[9] cgs |
| Temperature | 4,638[9] K |
| Metallicity [Fe/H] | +0.13[9] dex |
| Rotational velocity (v sin i) | 5.0[7] km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[10] | |
| Database references | |
| SIMBAD | data |
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κ Lyrae, Latinized as Kappa Lyrae, is a solitary[11] star in the northern constellation of Lyra, near the constellation border with Hercules. It is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.33.[2] This object is located approximately 252 light years from the Sun based on parallax,[1] but is moving closer with a radial velocity of −24 km/s.[7]
This is an aging giant star with a stellar classification of K2-IIIabCN0.5,[4] with the suffix notation indicating a mild underabundance of cyanogen. Having exhausted the supply of hydrogen at its core, the star has cooled and expanded. It now has 18[7] times the Sun's girth and is radiating 127[8] times the luminosity of the Sun at an effective temperature of 4,638 K.[9] κ Lyrae is a red clump giant, which means it is on the horizontal branch and is generating energy through core helium fusion.[3] It is a suspected small amplitude variable star.[6]
References
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- ↑ a b c d e f 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".
- ↑ 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".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
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