GQ Lupi
A visual band light curve for GQ Lupi. The main plot (from ASAS data), shows the long-term variability, and the inset plot (adapted from Broeg et al.) shows the short-term periodic brightness variation. | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 49m 12.1056s |
| Declination | −35° 39′ 05.0540″ |
| Apparent magnitude (V) | 11.40 |
| Characteristics | |
| A | |
| Evolutionary stage | T Tauri star |
| Spectral type | K7V |
| B−V color index | 0.96 |
| Variable type | T Tauri variable |
| C (2MASS J15491331) | |
| Evolutionary stage | Red dwarf |
| Spectral type | M4 |
| Astrometry | |
| Proper motion (μ) | RA: −14.257±0.097 mas/yr Dec.: −23.596±0.066 mas/yr |
| Parallax (π) | 6.5868±0.0473 mas |
| Distance | 495 ± 4 ly (152 ± 1 pc) |
| Absolute magnitude (MV) | ~5 |
| Orbit | |
| Primary | GQ Lupi A |
| Companion | GQ Lupi C (2MASS J15491331) |
| Semi-major axis (a) | 2430 AU |
| Details | |
| A | |
| Mass | 0.7 M☉ |
| Age | <2 million years |
| C (2MASS J15491331) | |
| Mass | ~0.15 M☉ |
| Radius | 0.21 R☉ |
| Temperature | 3190 K |
| Other designations | |
| CD−35°10525, GQ Lup | |
| Database references | |
| SIMBAD | data |
GQ Lupi is a T Tauri variable star approximately 495 light-years away in the constellation of Lupus. The star is young and has about 70% of the Sun's mass.