AS 280

POSSIBLE MILKY WAY

Constellation
Sagittarius

Equatorial coordinates
α = 18 09 52.306
δ = -33 19 50.000

Galactic coordinates
l = 358.7683°
b = -6.6857°

Suspected	1973^Ref
Confirmed	-
Symbiotic IR type	S?^Ref
Hot component type	shell-burning?^Ref
Outbursts	Yes?^Ref

Identifiers

AS 280	IRAS -	GSC2.4.2 S9UB049946	AAVSO 000-BJT-865
SIMBAD EM* AS 280	Pan-STARRS -	SAO -	VSX 241103
GAIA DR3 4039688527424294144	SkyMapper -	WRAY 16-375	GCVS -
2MASS J18095230-3319499	HIP -	Hen 2-354	BD -
WISE J180952.31-331950.5	TYC -	ESO 394-32	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	AS 280 (Susp.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	AS 280 (Susp.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	272.4679^Ref	Parallax (mas)	0.068±0.025^Ref	Reddening E(B-V) (mag)	0.31±0.01^Ref ^{, Note}
Declination (°)	-33.3306^Ref	Distance (kpc)	8.44^Ref ^{, Note}, 8.31^Ref ^{, Note}
Galactic longitude (°)	358.7683^Ref	Proper motion in α (mas/yr)	-3.11±0.03^Ref
Galactic latitude (°)	-6.6857^Ref	Proper motion in δ (mas/yr)	-4.68±0.02^Ref

Observations

X-Ray	-	IR type	S?^Ref	Radio	-
X-Ray type	-	J (mag)	12.18^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	11.89^Ref	Outbursts	Yes?^Ref
GALEX NUV (mag)	-	K (mag)	11.60^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	10.87^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	10.57^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	9.74^Ref	IPmax (eV)	54.4^Ref
B (mag)	12.00^Ref	WISE W4 (mag)	8.85^Ref	[O III] lines	No^Ref
V (mag)	13.10^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	13.32^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	13.10^Ref	IRAS 100μm (Jy)	-
G (mag)	12.89^Ref	AKARI S09 (Jy)	-
RP (mag)	12.52^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	-	Size of giant’s orbit (AU)	-
Eccentricity	-	RV of giant (km/h)	-	Separation (AU)	-
Inclination (°)	-	Inferior conj. of giant (JD)	-	Mass function	-
Eclipses	-			Mass ratio	-
Orbital ephemeris	-

Cool component

Spectral type	M^Ref	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	-
IR type	S?^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

Type/Spectral type	-	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning?^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Possible symbiotic star detected in outburst (Mikołajewska et al., 1997). Previously already classified as a symbiotic star by Sanduleak & Stephenson (1973).

References

Mikołajewska, J., Acker, A., Stenholm, B., 1997, A&A, 327, 191, 1997A&A...327..191M
Sanduleak, N., Stephenson, C. B., 1973, ApJ, 185, 899, 1973ApJ...185..899S

Last updated: August 20, 2021