Rho Serpentis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | Template:RA[3] |
| Declination | Template:DEC[3] |
| Apparent magnitude (V) | 4.78[4] |
| Characteristics | |
| Spectral type | K4.5III[5] |
| U−B Template:Engvar | +1.88[4] |
| B−V Template:Engvar | +1.54[4] |
| Astrometry | |
| Radial velocity (Rv) | −61.96[6] km/s |
| Proper motion (μ) | RA: −53.32[3] mas/yr Dec.: +18.87[3] mas/yr |
| Parallax (π) | 8.70±0.30 mas[3] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −0.56[7] |
| Details | |
| Radius | Script error: No such module "val".[8] Template:Solar radius |
| Luminosity | Script error: No such module "val".[8] Template:Solar luminosity |
| Surface gravity (log g) | 1.68[9] cgs |
| Temperature | Script error: No such module "val".[8] K |
| Metallicity [Fe/H] | −0.08[7] dex |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[10] | |
| Database references | |
| SIMBAD | data |
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Rho Serpentis, Latinized from ρ Serpentis, is a single[11] star in the Caput section of the equatorial Serpens constellation. It has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.78.[4] The distance to this star is approximately 375 light years based on parallax,[3] but it is drifting closer to the Sun with a radial velocity of −62 km/s.[6]
This is an aging giant star with a stellar classification of K4.5III.[5] It is a suspected variable star of unknown type, with an I-band brightness ranging from 3.29 down to 3.44 magnitude.[12] Hipparcos photometry revealed a microvariability with a frequency of 0.17017 cycles per day and an amplitude of 0.0080.[2] With the supply of hydrogen exhausted at its core, it has expanded and now has 48[8] times the Sun's girth. The star is radiating 492[8] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 3,930 K.[8]
References
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- ↑ a b c d e f Script error: No such module "Citation/CS1". Vizier catalog entry
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- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c d e f Template:Cite DR2
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- ↑ Template:Cite simbad
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- ↑ Script error: No such module "citation/CS1".
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