GG Lupi
| Observation data Epoch J2000 Equinox J2000 | ||
|---|---|---|
| Constellation | Lupus | |
| Right ascension | 15h 18m 56.3747s[2] | |
| Declination | −40° 47′ 17.597″[2] | |
| Apparent magnitude (V) | 5.58 - 6.11[3] | |
| Characteristics | ||
| Spectral type | B7V (primary) B9V (secondary) | |
| U−B color index | −0.46[4] | |
| B−V color index | −0.099[4] | |
| Variable type | Algol[3] | |
| Absolute magnitude (MV) | −0.53[5] | |
Inclination (i) | 87.5° | |
| Details | ||
| Primary | ||
Myr | ||
| Database references | ||
| SIMBAD | data | |
GG Lupi is an
eclipsing binary star in the southern constellation of Lupus. Most of the time it is a magnitude 5.6 object, making it faintly visible to the naked eye, but during the primary eclipse its brightness falls to 6.1.[3] GG Lupi is located 1/2 degree (one full moon diameter) west of the 3rd magnitude star Delta Lupi
.
This star was found to be a
Gould's Belt star formation region.[4]
The two stars comprising this binary are both very young main sequence stars of spectral type B. They are estimated to be about 20 million years old, placing them near the zero-age main sequence.[7] Their orbit is somewhat eccentric (e=0.15) and the period of apsidal precession is 102 years.[11]
References
- ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 10 December 2022.
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c "GG Lup". The International Variable Star Index. AAVSO. Retrieved 10 December 2022.
- ^ .
- S2CID 119257644.
- ^ S2CID 244799745.
- ^ Bibcode:1993A&A...277..439A.
- ^ "V* GG Lup -- Eclipsing Binary". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-12-10.
- S2CID 121035980.
- S2CID 120477301.
- S2CID 121307009.
