Gaia17bpp
Gaia17bpp is a rare M-type Red giant star that exhibited a single large dimming event (G-16-20.5 mag) over 6.5 years. The variable star is located in the constellation of Sagitta roughly 27,600 ly (8.5 kpc).[1] Current hypothesis and archival data suggest that Gaia17bpp belongs to a rare family of ultra-long period binary stars where the companion is enshrouded in large optically thick disks reminiscent of Epsilon Aurigae, VVV-WIT-07, and AS Leonis Minoris.[1] The proposed secondary star and disk remain unconfirmed due to the copious amount of intervening interstellar dust, and likely to the remarkable long-time scale period of the system.
 Optical image of Gaia17bpp | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagitta |
| Right ascension | 09h 53m 10.001s[2] |
| Declination | +33° 53′ 52.76″[2] |
| Apparent magnitude (V) | 10.7 - 15.4[3] |
| Characteristics | |
| Variable type | Algol[3] |
| Astrometry | |
| Radial velocity (Rv) | -56.14[2] km/s |
| Proper motion (μ) | RA: 3.054±0.077[2] mas/yr Dec.: −11.645±0.071[2] mas/yr |
| Parallax (π) | 0.6994±0.0513 mas[2] |
| Distance | 4,700 ± 300 ly (1,400 ± 100 pc) |
| Other designations | |
| AS LMi, TYC 2505-672-1, MASTER OT J095310.04+335352.8, IRAS F09501+3408, 2MASS J09531000+3353527 | |
| Database references | |
| SIMBAD | J19372316+1759029 data |
- ^ a b Tzanidakis, Anastasios; Davenport, James R. A.; Bellm, Eric C.; Wang, Yuankun (2023-09-01). "Gaia17bpp: A Giant Star with the Deepest and Longest Known Dimming Event". The Astrophysical Journal. 955 (1): 69. doi:10.3847/1538-4357/aceda7. ISSN 0004-637X.
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