TY Pyxidis
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pyxis |
| Right ascension | 08h 59m 42.72169s[2] |
| Declination | –27° 48′ 58.6885″[2] |
| Apparent magnitude (V) | 6.85 - 7.5[3] |
| Characteristics | |
| Spectral type | G5IV + G5IV |
| Variable type | RS Canum Venaticorum variable |
| Astrometry | |
| Radial velocity (Rv) | +63.20 ± 1 km/s |
| Proper motion (μ) | RA: –44.46 ± 0.34[2] mas/yr Dec.: –44.36 ± 0.42[2] mas/yr |
| Parallax (π) | 17.73±0.52 mas[2] |
| Distance | 184 ± 5 ly (56 ± 2 pc) |
| Details | |
| Radius | 2.2[4] R☉ |
| Temperature | 5400[4] K |
| Other designations | |
| TY Pyxidis, CD−27° 6141, HD 77137, HIP 44164, SAO 176805. | |
| Database references | |
| SIMBAD | data |
TY Pyxidis is an eclipsing binary star in the constellation Pyxis. The apparent magnitude ranges from 6.85 to 7.5 over 3.2 days.[3]
The two components are both of spectral type G5IV,[4] have a mass of 1.2 solar masses and revolve around each other every 3.2 days.[5] Each star is around 2.2 times the diameter of the Sun.[4]
The system is classified as either a RS Canum Venaticorum variable[3] or a BY Draconis variable, stars that vary on account of prominent starspot activity,[4] and lies 184 ± 5 light years away.[2] The system emits X-rays, and analysing the emission curve over time led Pres and colleagues to conclude that there was a loop of material arcing between the two stars.[6]
References
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