GR Sgr

Constellation
Sagittarius

Equatorial coordinates
α = 18 22 58.504
δ = -25 34 47.341

Galactic coordinates
l = 7.0004°
b = -5.5917°

Suspected	1992^Ref
Re-classified	2002^Ref
Type	CV^Ref

Identifiers

GR Sgr	IRAS -	GSC2.4.2 S9TI042314	AAVSO 000-BCC-196
SIMBAD V* GR Sgr	Pan-STARRS 77302757437844551	SAO -	VSX 27900
GAIA DR3 4053113908177988608	SkyMapper 182258.52-253447.3	WRAY -	GCVS GR Sgr
2MASS J18225850-2534473	HIP -	Hen -	BD -
WISE -	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	-
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	275.7438^Ref	Parallax (mas)	0.717±0.050^Ref	Reddening E(B-V) (mag)	0.46±0.02^Ref ^{, Note}
Declination (°)	-25.5798^Ref	Distance (kpc)	1.35^Ref ^{, Note}, 1.55^Ref ^{, Note}
Galactic longitude (°)	7.0004^Ref	Proper motion in α (mas/yr)	2.19±0.06^Ref
Galactic latitude (°)	-5.5917^Ref	Proper motion in δ (mas/yr)	-1.68±0.04^Ref

Links

SIMBAD CDS Portal

Notes

Suggested to be a symbiotic system based on a low-resolution spectrum by Bianchini et al. (1992), the presence of a giant star in the system was claimed by Pagnotta & Schaefer (2014), referring to Hoard et al. (2002). However, they proposed that the secondary is a MS star, classifying the target as a CV. Additionally, Tappert et al. (2015) suggested that the donor is likely an MS star based on its location on the color-magnitude diagram, and they detected semi-regular variability with a period of 225 days. Tappert et al. (2015) claimed that the system maintains a high mass transfer rate.

References

Bianchini, A., Della valle, M., Duerbeck, H. W. et al., 1992, The Messenger, 69, 42, 1992Msngr..69...42B
Hoard, D. W., Wachter, S., Clark, L. L. et al., 2002, ApJ, 565, 1, 511, 2002ApJ...565..511H
Pagnotta, A., Schaefer, B. E., 2014, ApJ, 788, 2, 164, 2014ApJ...788..164P
Tappert, C., Vogt, N., Schmidtobreick, L. et al., 2015, MNRAS, 450, 1, 943, 2015MNRAS.450..943T