New Online Database of Symbiotic Variables: AS 288

LIKELY MILKY WAY

Constellation
Sagittarius

Equatorial coordinates
α = 18 12 47.981
δ = -28 19 59.807

Galactic coordinates
l = 3.4920°
b = -4.8740°

Suspected	1978^Ref
Confirmed	-
Symbiotic IR type	D?^Ref
Hot component type	shell-burning?^Ref
Outbursts	-

Identifiers

AS 288	IRAS 18095-2820	GSC2.4.2 S9TL016082	AAVSO 000-BJT-866
SIMBAD PN H 2-43	Pan-STARRS 74002731999410398	SAO -	VSX 241105
GAIA DR3 4050670827750135040	SkyMapper -	WRAY 16-388	GCVS -
2MASS J18124799-2819596	HIP -	Hen 2-366	BD -
WISE J181247.98-281959.7	TYC -	ESO 456-75	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	AS 288 (Susp.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	AS 288 (Susp.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	273.1999^Ref	Parallax (mas)	0.126±0.028^Ref	Reddening E(B-V) (mag)	0.42±0.02^Ref ^{, Note}
Declination (°)	-28.3333^Ref	Distance (kpc)	6.34^Ref ^{, Note}, 6.29^Ref ^{, Note}
Galactic longitude (°)	3.4920^Ref	Proper motion in α (mas/yr)	-4.03±0.03^Ref
Galactic latitude (°)	-4.8740^Ref	Proper motion in δ (mas/yr)	-4.07±0.02^Ref

Observations

X-Ray	No^Ref	IR type	D?^Ref	Radio	No^Ref, Yes^Ref
X-Ray type	-	J (mag)	11.47^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	9.75^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.31^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	6.76^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	5.82^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	4.06^Ref	IPmax (eV)	54.4^Ref
B (mag)	12.00^Ref	WISE W4 (mag)	2.73^Ref	[O III] lines	-
V (mag)	14.20^Ref	IRAS 12μm (Jy)	1.24^Ref	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	1.10^Ref	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	4.33^Ref	O VI lines	No^Ref
BP (mag)	14.03^Ref	IRAS 100μm (Jy)	49.30^Ref
G (mag)	13.62^Ref	AKARI S09 (Jy)	0.80^Ref
RP (mag)	12.85^Ref	AKARI S18 (Jy)	0.70^Ref

Orbit

Orbital period (days)	1250^Ref	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	-	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)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Mentioned as a symbiotic star in Wright & Allen (1978). List as a suspected symbiotic binary in Belczyński et al. (2000). Its spectrum exhibits emission-lines with ionization potential up to 54.4 eV, but no late-type giant. In the IR diagram, it is situated among D-type symbiotic stars. The symbiotic nature is further supported by the analysis of IR data by Akras et al. (2019).

References

Akras, S., Leal-Ferreira, M. L., Guzman-Ramirez, L. et al., 2019, MNRAS, 483, 4, 5077, 2019MNRAS.483.5077A
Belczyński, K., Mikołajewska, J., Munari, U. et al., 2000, A&AS, 146, 407, 2000A&AS..146..407B
Wright, A. E., Allen, D. A., 1978, MNRAS, 184, 893, 1978MNRAS.184..893W

AS 288