MISCLASSIFIED
MILKY WAY
|
| FG Sge | IRAS 20097+2010 | GSC2.4.2 N2PM160590 | AAVSO 000-BCK-875 |
| SIMBAD Hen 1-5 | Pan-STARRS 132403029835901969 | SAO - | VSX 27512 |
| GAIA DR3 1828750899461025408 | SkyMapper - | WRAY - | GCVS FG Sge |
| 2MASS J20115606+2020044 | HIP 99527 | Hen 1-5, 2-457, 3-1844 | BD - |
| WISE J201156.05+202004.4 | TYC 1626-619-1 | ESO - | HD - |
| Bidelman (1954) | - | Allen (1984) | - | Belzcyński et al. (2001) | - |
| Gaposchkin (1957) | - | Kenyon (1986) | - | Akras et al. (2019) | - |
| Boyarchuk (1969) | - | Vaidis (1988, 1991) | FG Sge (Susp.) |
| Right ascension (°) | 302.9836Ref | Parallax (mas) | 0.682±0.223Ref | Reddening E(B-V) (mag) | 0.34±0.0Ref, Note |
| Declination (°) | 20.3345Ref | Distance (kpc) | 2.28Ref, Note, 1.40Ref, Note | ||
| Galactic longitude (°) | 60.3321Ref | Proper motion in α (mas/yr) | -2.42±0.30Ref | ||
| Galactic latitude (°) | -7.3926Ref | Proper motion in δ (mas/yr) | -8.37±0.45Ref |
Included in the list of symbiotic candidates by Vaidis (1988), possibly because a link with the symbiotic nova AG Peg was discussed by Richter (1960). However, the symbiotic nature was not confirmed. Over time, the object underwent changes in its spectroscopic appearance, transitioning from a hot central star of a PN to an F-type supergiant and later a carbon star, as documented in Iijima & Strafella (1993), Gehrz et al. (2005), and Jeffery & Schönberner (2006). Since 1992, it has exhibited R CrB-type variability (Jurcsik, 1993; Arkhipova et al., 1999; Rosenbush & Efimov, 2015).