Zeta Pyxidis
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Pyxis |
| Right ascension | 08h 39m 42.47410s[1] |
| Declination | −29° 33′ 39.8989″[1] |
| Apparent magnitude (V) | +4.88[2] (4.97 + 9.59)[3] |
| Characteristics | |
| Evolutionary stage | red clump[4] |
| Spectral type | G6 IIIb CN-0.5[5] |
| B−V color index | +0.90[2] |
| Astrometry | |
| Radial velocity (Rv) | −30.10[6] km/s |
| Proper motion (μ) | RA: −24.81[1] mas/yr Dec.: −90.96[1] mas/yr |
| Parallax (π) | 13.35±0.23 mas[1] |
| Distance | 244 ± 4 ly (75 ± 1 pc) |
| Absolute magnitude (MV) | +0.49[7] |
| Details | |
| ζ Pyx A | |
| Mass | 1.96[6] M☉ |
| Luminosity | 69[6] L☉ |
| Surface gravity (log g) | 2.72±0.06[8] cgs |
| Temperature | 4,876±8[6] K |
| Metallicity [Fe/H] | −0.43±0.02[8] dex |
| Age | 1.88[6] Gyr |
| Other designations | |
| ζ Pyx, CPD−29°2756, FK5 2680, HD 73898, HIP 42483, HR 3433, SAO 176253, WDS J08397-2934A[9] | |
| Database references | |
| SIMBAD | data |
Zeta Pyxidis (ζ Pyxidis) is a wide binary star[10] system in the southern constellation of Pyxis. It is visible to the naked eye with a combined apparent visual magnitude of +4.88.[2] Based upon an annual parallax shift of 13.35 mas as seen from Earth,[1] it is located around 244 light years from the Sun.
The yellow-hued primary, component A, is an evolved G-type giant star with a stellar classification of G6 IIIb CN-0.5,[5] where the suffix notation indicating it has anomalously weak lines of cyanogen. At the age of 1.88 billion years,[6] is a red clump star that is generating energy through the fusion of helium at its core.[4] The primary has nearly double the mass of the Sun and is radiating 69 times the Sun's luminosity from its photosphere at an effective temperature of 4,876 K.[6]
The companion, component B, is a magnitude 9.59 star at an angular separation of 52.20 arc seconds along a position angle of 61°, as of 2010.[3]
References
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