[KW2003] 21

Constellation
Ophiucus

Equatorial coordinates
α = 17 28 30.586
δ = -29 21 24.625

Galactic coordinates
l = 357.6390°
b = 2.9263°

Suspected	2019^Ref
Re-classified	2021^Ref
Type	emission-line star^Ref

Identifiers

[KW2003] 21	IRAS -	GSC2.4.2 S8HG059518	AAVSO -
SIMBAD [KW2003] 21	Pan-STARRS 72772621274752188	SAO -	VSX -
GAIA DR3 4059477915655995136	SkyMapper 172830.59-292124.1	WRAY -	GCVS -
2MASS J17283059-2921245	HIP -	Hen -	BD -
WISE J172830.58-292124.2	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 (°)	262.1274^Ref	Parallax (mas)	0.040±0.050^Ref	Reddening E(B-V) (mag)	1.3±0.04^Ref ^{, Note}
Declination (°)	-29.3568^Ref	Distance (kpc)	8.32^Ref ^{, Note}, 6.17^Ref ^{, Note}
Galactic longitude (°)	357.6390^Ref	Proper motion in α (mas/yr)	-1.44±0.06^Ref
Galactic latitude (°)	2.9263^Ref	Proper motion in δ (mas/yr)	-6.85±0.04^Ref

Links

SIMBAD CDS Portal

Notes

Previously classified as a potential symbiotic star by Akras et al. (2019) through a machine learning approach, it has since been reclassified as an YSO or Be star by Akras et al. (2021).

References

Akras, S., Gonçalves, D. R., Alvarez-Candal, A. et al., 2021, MNRAS, 502, 2, 2513, 2021MNRAS.502.2513A
Akras, S., Leal-Ferreira, M. L., Guzman-Ramirez, L. et al., 2019, MNRAS, 483, 4, 5077, 2019MNRAS.483.5077A