New Online Database of Symbiotic Variables: SS 326

Constellation
Sagittarius

Equatorial coordinates
α = 17 53 20.414
δ = -29 53 27.520

Galactic coordinates
l = 0.0451°
b = -1.9329°

Suspected	2019^Ref
Confirmed	2021^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

SS 326	IRAS 17502-2953	GSC2.4.2 S8DQ089073	AAVSO -
SIMBAD SS 326	Pan-STARRS 72132683350631136	SAO -	VSX 1468751
GAIA DR3 4056399699798000896	SkyMapper 175320.39-295327.4	WRAY -	GCVS -
2MASS J17532042-2953273	HIP -	Hen -	BD -
WISE J175320.40-295327.4	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 (°)	268.3351^Ref	Parallax (mas)	0.142±0.041^Ref	Reddening E(B-V) (mag)	0.8±0.02^Ref ^{, Note}
Declination (°)	-29.8910^Ref	Distance (kpc)	5.69^Ref ^{, Note}, 4.63^Ref ^{, Note}
Galactic longitude (°)	0.0451^Ref	Proper motion in α (mas/yr)	-2.89±0.04^Ref
Galactic latitude (°)	-1.9329^Ref	Proper motion in δ (mas/yr)	-8.35±0.03^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	9.80^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.68^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.29^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	8.16^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	8.20^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.85^Ref	IPmax (eV)	54.4^Ref
B (mag)	-	WISE W4 (mag)	6.65^Ref	[O III] lines	Yes^Ref
V (mag)	-	IRAS 12μm (Jy)	3.32^Ref	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	2.75^Ref	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	15.90^Ref	O VI lines	No^Ref
BP (mag)	14.93^Ref	IRAS 100μm (Jy)	196.00^Ref
G (mag)	13.29^Ref	AKARI S09 (Jy)	-
RP (mag)	12.03^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	406.509023^Ref	γ velocity (km/h)	-65.74±2.00^Ref	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

Initially considered a possible symbiotic star through a machine learning approach by Akras et al. (2019), subsequent spectroscopic observations, as presented by Akras et al. (2021), confirmed its symbiotic nature.

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

SS 326