TU Muscae
TU Muscae, also known as HD100213, is an eclipsing binary star in the constellation Musca. Its apparent magnitude ranges from 8.17 to 8.75 over around 1.4 days.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Musca |
| Right ascension | 11h 31m 10.92470s |
| Declination | −65° 44′ 32.1019″ |
| Apparent magnitude (V) | 8.307(8.17 - 8.75) |
| Characteristics | |
| Spectral type | O7V + O8V |
| U−B color index | −0.860 |
| B−V color index | +0.047 |
| Variable type | β Lyr |
| Astrometry | |
| Radial velocity (Rv) | −4 km/s |
| Proper motion (μ) | RA: −6.62 mas/yr Dec.: −1.21 mas/yr |
| Parallax (π) | 0.02 ± 0.76 mas |
| Orbit | |
| Period (P) | 1.387 days |
| Semi-major axis (a) | 17.34 R☉ |
| Eccentricity (e) | 0 |
| Inclination (i) | 77.7° |
| Longitude of the node (Ω) | 3.137° |
| Semi-amplitude (K1) (primary) | 214.5 km/s |
| Semi-amplitude (K2) (secondary) | 345.8 km/s |
| Details | |
| Primary | |
| Mass | 16.8 M☉ |
| Radius | 7.2 R☉ |
| Luminosity | 105,000 L☉ |
| Surface gravity (log g) | 4.05 cgs |
| Temperature | 35,000 K |
| secondary | |
| Mass | 10.5 M☉ |
| Radius | 5.7 R☉ |
| Luminosity | 35,000 L☉ |
| Surface gravity (log g) | 4.04 cgs |
| Temperature | 31,366 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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