New Online Database of Symbiotic Variables: LHA 115-S 50

SUSPECTED SMC

Constellation
Tucana

Equatorial coordinates
α = 01 06 32.404
δ = -72 17 19.534

Galactic coordinates
l = 301.3144°
b = -44.7920°

Suspected	2002^Ref
Confirmed	-
Symbiotic IR type	S?^Ref
Hot component type	-
Outbursts	-

Identifiers

LHA 115-S 50	IRAS -	GSC2.4.2 S0XG298749	AAVSO -
SIMBAD LHA 115-S 50	Pan-STARRS -	SAO -	VSX 2230623
GAIA DR3 4687489481109769216	SkyMapper 010632.41-721719.5	WRAY -	GCVS -
2MASS J01063239-7217195	HIP -	Hen -	BD -
WISE J010632.40-721719.5	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 (°)	16.6350^Ref	Parallax (mas)	0.019±0.014^Ref	Reddening E(B-V) (mag)	0.13±0.01^Ref ^{, Note}
Declination (°)	-72.2888^Ref	Distance (kpc)	62.1±1.9^Ref 24.38^Ref ^{, Note}, 24.57^Ref ^{, Note}
Galactic longitude (°)	301.3144^Ref	Proper motion in α (mas/yr)	0.94±0.02^Ref
Galactic latitude (°)	-44.7920^Ref	Proper motion in δ (mas/yr)	-1.37±0.02^Ref

Observations

X-Ray	No^Ref	IR type	S?^Ref	Radio	-
X-Ray type	-	J (mag)	10.86^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	10.10^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	9.90^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	9.69^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	9.78^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	9.44^Ref	IPmax (eV)	13.6^Ref
B (mag)	13.18^Ref	WISE W4 (mag)	8.71^Ref	[O III] lines	No^Ref
V (mag)	13.22^Ref	IRAS 12μm (Jy)	-	He II lines	No^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	13.68^Ref	IRAS 100μm (Jy)	-
G (mag)	12.87^Ref	AKARI S09 (Jy)	-
RP (mag)	11.99^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	137.40±3.53^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	K-M^Ref, K5^Ref	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	3700±400^Ref	Radius (R_⊙)	-	Type	-
IR type	S?^Ref	Luminosity (L_⊙)	2596±4024^Ref	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

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

Links

SIMBAD CDS Portal

Notes

The star is included in the list of possible symbiotic stars or closely related objects in Munari & Zwitter (2002). Its spectrum shows Balmer lines in emission. It is also classified as a red supergiant star in Boyer et al. (2011). Additionally, a strong UV continuum was reported by Sanduleak & Pesch (1981). It has been classified as Ke + Be in Walker (1983).

References

Boyer, M. L., Srinivasan, S., van Loon, J. T. et al., 2011, AJ, 142, 4, 103, 2011AJ....142..103B
Munari, U., Zwitter, T., 2002, A&A, 383, 188, 2002A&A...383..188M
Sanduleak, N., Pesch, P., 1981, PASP, 93, 431, 1981PASP...93..431S
Walker, A. R., 1983, MNRAS, 203, 25, 1983MNRAS.203...25W

LHA 115-S 50