del Sge

Constellation
Sagitta

Equatorial coordinates
α = 19 47 23.274
δ = +18 32 03.534

Galactic coordinates
l = 55.7669°
b = -3.3834°

Suspected	2019^Ref
Re-classified	2019^Ref
Type	M2 II + B9.5 V^Ref

Identifiers

del Sge	IRAS 19451+1824	GSC2.4.2 N1TZ000111	AAVSO 000-BCH-941
SIMBAD * del Sge	Pan-STARRS -	SAO 105259	VSX 27700
GAIA DR3 1824534959611831680	SkyMapper -	WRAY -	GCVS del Sge
2MASS J19472326+1832034	HIP 97365	Hen -	BD +18 4240B
WISE J194723.26+183203.4	TYC 1619-3542-1	ESO -	HD 187077

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 (°)	296.8470^Ref	Parallax (mas)	5.967±0.260^Ref	Reddening E(B-V) (mag)	0.61±0.03^Ref ^{, Note}
Declination (°)	18.5343^Ref	Distance (kpc)	0.17^Ref ^{, Note}, 0.17^Ref ^{, Note}
Galactic longitude (°)	55.7669^Ref	Proper motion in α (mas/yr)	7.28±0.24^Ref
Galactic latitude (°)	-3.3834^Ref	Proper motion in δ (mas/yr)	0.32±0.23^Ref

Links

SIMBAD CDS Portal

Notes

This binary system is suggested to be composed of an M2 II giant and an A0 V star with an orbital period of 3725 days, as reported in Sahade (1986). Pugh et al. (2015) determined a period of 3703.7 days. It is also classified as a VV Cephei-like system, according to Pantaleoni González et al. (2020).

References

Eggleton, P. P., Yakut, K., 2017, MNRAS, 468, 3, 3533, 2017MNRAS.468.3533E
Pantaleoni González, M., Maíz Apellániz, J., Barbá, R. H. et al., 2020, RNAAS, 4, 1, 12, 2020RNAAS...4...12P
Pugh, T., Gray, D. F., Griffin, R. F., 2015, MNRAS, 454, 3, 2344, 2015MNRAS.454.2344P
Sahade, J., 1986, New Insights in Astrophysics. Eight Years of UV Astronomy with IUE, 263, 267, 1986ESASP.263..267S
Weaver, W. B., 2000, ApJ, 541, 1, 298, 2000ApJ...541..298W