New Online Database of Symbiotic Variables: V426 Sge

Constellation
Sagitta

Equatorial coordinates
α = 19 54 42.954
δ = +17 22 12.706

Galactic coordinates
l = 55.6439°
b = -5.4756°

Suspected	2018^Ref
Confirmed	2018^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	Yes^Ref - SyN + Z And^Ref

Identifiers

V426 Sge	IRAS -	GSC2.4.2 N1VG000738	AAVSO 000-BMS-818
SIMBAD V* V426 Sge	Pan-STARRS 128842986789274645	SAO -	VSX 572102
GAIA DR3 1820429451883563264	SkyMapper -	WRAY -	GCVS V0426 Sge
2MASS J19544295+1722125	HIP -	Hen -	BD -
WISE J195442.95+172212.7	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 (°)	298.6790^Ref	Parallax (mas)	0.189±0.028^Ref	Reddening E(B-V) (mag)	0.29±0.01^Ref ^{, Note}
Declination (°)	17.3702^Ref	Distance (kpc)	3.3^Ref 4.53^Ref ^{, Note}, 3.96^Ref ^{, Note}
Galactic longitude (°)	55.6439^Ref	Proper motion in α (mas/yr)	-5.01±0.03^Ref
Galactic latitude (°)	-5.4756^Ref	Proper motion in δ (mas/yr)	-6.09±0.03^Ref

Observations

X-Ray	Yes^Ref	IR type	S^Ref	Radio	-
X-Ray type	β^Ref	J (mag)	7.79^Ref	Flickering	No^Ref
GALEX FUV (mag)	-	H (mag)	6.87^Ref	Outbursts	Yes^Ref
GALEX NUV (mag)	-	K (mag)	6.50^Ref	Outburst type	SyN + Z And^Ref
IUE	No^Ref	WISE W1 (mag)	6.29^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	6.36^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	6.07^Ref	IPmax (eV)	114^Ref
B (mag)	13.80^Ref	WISE W4 (mag)	5.56^Ref	[O III] lines	No^Ref
V (mag)	12.64^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	12.47^Ref	IRAS 100μm (Jy)	-
G (mag)	11.04^Ref	AKARI S09 (Jy)	0.23^Ref
RP (mag)	9.84^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	493.4±0.7^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	Min (V) = 2440873±7 + 493.4±0.7 x E^Ref

Cool component

Spectral type	M4.7^Ref	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	3400^Ref	Radius (R_⊙)	106^Ref	Type	-
IR type	S^Ref	Luminosity (L_⊙)	1350^Ref	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

Type/Spectral type	-	Mass (M_⊙)	0.5^Ref	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	150000^Ref	Luminosity (L_⊙)	2300^Ref
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal ARAS Database

Notes

An outburst of this new symbiotic star was observed by Munari et al. (2018). The historical light curve of the star was analyzed by Skopal et al. (2020), who claimed that the star exhibited a symbiotic nova outburst in 1968.

References

Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M
Munari, U., Dallaporta, S., Valisa, P. et al., 2018, ATel, 11937, 1, 2018ATel11937....1M
Skopal, A., Shugarov, S. Y., Munari, U. et al., 2020, A&A, 636, A77, 2020A&A...636A..77S
Skopal, A., Shugarov, S., Shagatova, N. et al., 2023, ATel, 16280, 1, 2023ATel16280....1S

V426 Sge