AS 269

CONFIRMED MILKY WAY

Constellation
Sagittarius

Equatorial coordinates
α = 18 03 23.961
δ = -32 42 25.172

Galactic coordinates
l = 358.6650°
b = -5.1961°

Suspected	1985^Ref
Confirmed	2000^Ref
Symbiotic IR type	D'^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

AS 269	IRAS 18001-3242	GSC2.4.2 S9SG000277	AAVSO 000-BJT-847
SIMBAD EM* AS 269	Pan-STARRS -	SAO -	VSX 241067
GAIA DR3 4042885769793130752	SkyMapper -	WRAY 16-356	GCVS -
2MASS J18032395-3242249	HIP -	Hen 2-331	BD -
WISE J180323.97-324224.9	TYC -	ESO 394-23	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	AS 269 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	AS 269 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	270.8498^Ref	Parallax (mas)	-	Reddening E(B-V) (mag)	0.56±0.01^Ref ^{, Note}
Declination (°)	-32.7070^Ref	Distance (kpc)	0.6^Ref 0.73^Ref ^{, Note}, 0.73^Ref ^{, Note}
Galactic longitude (°)	358.6650^Ref	Proper motion in α (mas/yr)	-
Galactic latitude (°)	-5.1961^Ref	Proper motion in δ (mas/yr)	-

Observations

X-Ray	No^Ref	IR type	D'^Ref	Radio	No^Ref
X-Ray type	-	J (mag)	12.15^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	11.31^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	9.94^Ref	Outburst type	-
IUE	Yes^Ref	WISE W1 (mag)	6.77^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	5.69^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	3.75^Ref	IPmax (eV)	54.4^Ref
B (mag)	13.99^Ref	WISE W4 (mag)	1.33^Ref	[O III] lines	Yes^Ref
V (mag)	13.22^Ref	IRAS 12μm (Jy)	1.01^Ref	He II lines	Yes^Ref
R (mag)	13.65^Ref	IRAS 25μm (Jy)	2.54^Ref	[Fe VII] lines	No^Ref
I (mag)	12.74^Ref	IRAS 60μm (Jy)	1.06^Ref	O VI lines	No^Ref
BP (mag)	13.46^Ref	IRAS 100μm (Jy)	26.50^Ref
G (mag)	13.90^Ref	AKARI S09 (Jy)	0.95^Ref
RP (mag)	12.39^Ref	AKARI S18 (Jy)	1.91^Ref

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	G5-K2^Ref	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	-
IR type	D'^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)	24000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

This object was initially considered as a possible PN in Henize (1967) and a B[e] star in Sanduleak & Stephenson (1973). Subsequent works by Whitelock (1985) and Mikołajewska et al. (1997) identified it as a suspected symbiotic star. Finally, in Belczyński et al. (2000), it was reclassified as a confirmed symbiotic system.

References

Belczyński, K., Mikołajewska, J., Munari, U. et al., 2000, A&AS, 146, 407, 2000A&AS..146..407B
Henize, K. G., 1967, ApJS, 14, 125, 1967ApJS...14..125H
Kaler, J. B., 1976, ApJS, 31, 517, 1976ApJS...31..517K
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
Whitelock, P. A., 1985, MNRAS, 213, 59, 1985MNRAS.213...59W

Last updated: April 14, 2022