SMC2

CONFIRMED SMC

Constellation
Hydrus

Equatorial coordinates
α = 00 42 47.882
δ = -74 42 00.048

Galactic coordinates
l = 303.7038°
b = -42.4153°

Suspected	1992^Ref
Confirmed	1992^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	Yes^Ref

Identifiers

SMC2	IRAS -	GSC2.4.2 S0XL196970	AAVSO 000-BLT-628
SIMBAD NAME SMC Symbiotic star 2	Pan-STARRS -	SAO -	VSX 410496
GAIA DR3 4685466139175307392	SkyMapper 004247.83-744200.0	WRAY -	GCVS -
2MASS J00424786-7442001	HIP -	Hen -	BD -
WISE J004247.87-744200.0	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	SMC2 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	SMC2 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	10.6995^Ref	Parallax (mas)	0.027±0.032^Ref	Reddening E(B-V) (mag)	0.04±0.0^Ref ^{, Note}
Declination (°)	-74.7000^Ref	Distance (kpc)	62.1±1.9^Ref 10.59^Ref ^{, Note}, 9.57^Ref ^{, Note}
Galactic longitude (°)	303.7038^Ref	Proper motion in α (mas/yr)	0.62±0.03^Ref
Galactic latitude (°)	-42.4153^Ref	Proper motion in δ (mas/yr)	-1.08±0.04^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	14.04^Ref	Flickering	-
GALEX FUV (mag)	19.77^Ref	H (mag)	13.34^Ref	Outbursts	Yes^Ref
GALEX NUV (mag)	19.80^Ref	K (mag)	13.10^Ref	Outburst type	-
IUE	Yes^Ref	WISE W1 (mag)	13.00^Ref	Jets	-
FUSE	Yes^Ref	WISE W2 (mag)	12.94^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	12.33^Ref	IPmax (eV)	114^Ref
B (mag)	17.68^Ref	WISE W4 (mag)	9.14^Ref	[O III] lines	No^Ref
V (mag)	16.52^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	14.90^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	15.06^Ref	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	16.82^Ref	IRAS 100μm (Jy)	-
G (mag)	16.08^Ref	AKARI S09 (Jy)	-
RP (mag)	15.21^Ref	AKARI S18 (Jy)	-

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	G-K^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)	200000^Ref	Luminosity (L_⊙)	300^Ref
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Outbursts were observed in the case of the star SMC2, as documented in Morgan (1992).

References

Akras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L. et al., 2019, ApJS, 240, 2, 21, 2019ApJS..240...21A
Morgan, D. H., 1992, MNRAS, 258, 639, 1992MNRAS.258..639M
Mürset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A...307..516M
Mürset, U., Schmid, H. M., 1999, A&AS, 137, 473, 1999A&AS..137..473M
Mürset, U., Wolff, B., Jordan, S., 1997, A&A, 319, 201, 1997A&A...319..201M
Phillips, J. P., 2007, MNRAS, 376, 3, 1120, 2007MNRAS.376.1120P

Last updated: May 2, 2019