 A visual band light curve for GQ Lupi. The main plot (from ASAS data[1]), shows the long-term variability, and the inset plot (adapted from Broeg et al.[2]) shows the short-term periodic brightness variation. | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 49m 12.1056s[3] |
| Declination | −35° 39′ 05.0540″[3] |
| Apparent magnitude (V) | 11.40[4] |
| Characteristics | |
| A | |
| Evolutionary stage | T Tauri star[5] |
| Spectral type | K7V[4] |
| B−V color index | 0.96[4] |
| Variable type | T Tauri variable[5] |
| C (2MASS J15491331)[a] | |
| Evolutionary stage | Red dwarf |
| Spectral type | M4[6] |
| Astrometry | |
| Proper motion (μ) | RA: −14.257±0.097[3] mas/yr Dec.: −23.596±0.066[3] mas/yr |
| Parallax (π) | 6.5868 ± 0.0473 mas[3] |
| Distance | 495 ± 4 ly (152 ± 1 pc) |
| Absolute magnitude (MV) | ~5[7] |
| Orbit | |
| Primary | GQ Lupi A |
| Companion | GQ Lupi C (2MASS J15491331)[a] |
| Semi-major axis (a) | 2430 AU[6] |
| Details | |
| A | |
| Mass | 0.7[8] M☉ |
| Age | <2 million[8] years |
| C (2MASS J15491331)[a] | |
| Mass | ∼0.15[6] M☉ |
| Radius | 0.21[6] R☉ |
| Temperature | 3190 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
GQ Lupi is a T Tauri variable star approximately 495 light-years away[3] in the constellation of Lupus.[5] The star is young and has about 70% of the Sun's mass.[8]
- ^ Cite error: The named reference
ASASServerwas invoked but never defined (see the help page). - ^ Cite error: The named reference
Broegwas invoked but never defined (see the help page). - ^ a b c d e f Cite error: The named reference
Gaia DR2was invoked but never defined (see the help page). - ^ a b c d "V* GQ Lup". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 13, 2008.
- ^ a b c Astrometric and photometric monitoring of GQ Lupi and its sub-stellar companion, Ralph Neuhaeuser, Markus Mugrauer, Andreas Seifahrt, Tobias Schmidt, and Nikolaus Vogt, Astronomy and Astrophysics 484, #1 (2008), pp. 281–291. doi:10.1051/0004-6361:20078493. Bibcode:2008A&A...484..281N
- ^ a b c d Cite error: The named reference
Alcala2020was invoked but never defined (see the help page). - ^ From parallax and apparent magnitude.
- ^ a b c First image of exoplanet orbiting Sun-like star, Kelly Young, April 4, 2005, NewScientist.com news service. Accessed on line June 13, 2008.
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