Theta2 Crucis
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Crux |
| Right ascension | 12h 04m 19.2155s[1] |
| Declination | −63° 09′ 56.559″[1] |
| Apparent magnitude (V) | 4.718[2] |
| Characteristics | |
| Spectral type | B2 IV[2] |
| U−B color index | −0.61[3] |
| B−V color index | −0.08[3] |
| Variable type | Beta Cephei variable |
| Astrometry | |
| Radial velocity (Rv) | +16.3[4] km/s |
| Proper motion (μ) | RA: −17.19[1] mas/yr Dec.: −0.01[1] mas/yr |
| Parallax (π) | 4.33 ± 0.53[1] mas |
| Distance | approx. 750 ly (approx. 230 pc) |
| Details | |
| Rotational velocity (v sin i) | 23[5] km/s |
| Other designations | |
Theta2 Crucis (θ2 Cru / Theta2 Crucis) is a spectroscopic binary star in the constellation Crux. This pair of stars complete an orbit every 3.4280 days and they have a low orbital eccentricity that is close to 0.0.[6] Theta2 Crucis is located at about 750 light-years from the Sun.[1]
The system has a combined mean apparent magnitude of +4.72m. Since a member of the system is a β Cephei-type variable star, the magnitude is not fixed but varies slightly between +4.70m and +4.74m. The period of this variability is 0.0889 days.[7] The system is categorized as is a blue-white subgiant with a stellar classification of B2 IV.
References
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- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
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