New Online Database of Symbiotic Variables: [KW2003] 98

Constellation
Sagittarius

Equatorial coordinates
α = 18 13 33.627
δ = -24 52 25.011

Galactic coordinates
l = 6.6253°
b = -3.3799°

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

Identifiers

[KW2003] 98	IRAS -	GSC2.4.2 S9SA034382	AAVSO -
SIMBAD VPHAS J181333.6-245225.0	Pan-STARRS 78152733900491958	SAO -	VSX -
GAIA DR3 4065368033805697024	SkyMapper 181333.66-245224.5	WRAY -	GCVS -
2MASS J18133363-2452248	HIP -	Hen -	BD -
WISE J181333.62-245224.9	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 (°)	273.3901^Ref	Parallax (mas)	0.141±0.026^Ref	Reddening E(B-V) (mag)	1.08±0.03^Ref ^{, Note}
Declination (°)	-24.8736^Ref	Distance (kpc)	5.10^Ref ^{, Note}, 4.88^Ref ^{, Note}
Galactic longitude (°)	6.6253^Ref	Proper motion in α (mas/yr)	-4.78±0.03^Ref
Galactic latitude (°)	-3.3799^Ref	Proper motion in δ (mas/yr)	-10.06±0.03^Ref

Observations

X-Ray	-	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	9.57^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.39^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	7.96^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	7.69^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.72^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.50^Ref	IPmax (eV)	54.4^Ref
B (mag)	-	WISE W4 (mag)	7.29^Ref	[O III] lines	Yes^Ref
V (mag)	15.10^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	15.29^Ref	IRAS 100μm (Jy)	-
G (mag)	13.33^Ref	AKARI S09 (Jy)	-
RP (mag)	11.99^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	161.12±12.79^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

Previously considered a potential symbiotic star based on a machine learning approach (Akras et al., 2019), this classification has been confirmed through spectroscopic observation (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

[KW2003] 98