New Online Database of Symbiotic Variables: XX Dra

Constellation
Draco

Equatorial coordinates
α = 19 03 59.239
δ = +49 16 40.699

Galactic coordinates
l = 79.6123°
b = 18.2887°

Suspected	2023^Ref
Confirmed	-
Symbiotic IR type	-
Hot component type	accreting-only^Ref
Outbursts	-

Identifiers

XX Dra	IRAS 19026+4912	GSC2.4.2 N2EM001053	AAVSO 000-BDQ-337
SIMBAD V* XX Dra	Pan-STARRS 167132859968444283	SAO -	VSX 13721
GAIA DR3 2132052384561165184	SkyMapper -	WRAY -	GCVS XX Dra
2MASS J19035924+4916407	HIP -	Hen -	BD -
WISE J190359.22+491640.8	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 (°)	285.9968^Ref	Parallax (mas)	0.190±0.065^Ref	Reddening E(B-V) (mag)	0.06±0.0^Ref ^{, Note}
Declination (°)	49.2780^Ref	Distance (kpc)	4.13^Ref ^{, Note} -^{, Note}
Galactic longitude (°)	79.6123^Ref	Proper motion in α (mas/yr)	-2.05±0.08^Ref
Galactic latitude (°)	18.2887^Ref	Proper motion in δ (mas/yr)	-3.11±0.08^Ref

Observations

X-Ray	-	IR type	-	Radio	-
X-Ray type	-	J (mag)	6.09^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	5.21^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	4.72^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	4.70^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	3.68^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	2.87^Ref	IPmax (eV)	-
B (mag)	14.24^Ref	WISE W4 (mag)	2.00^Ref	[O III] lines	-
V (mag)	12.66^Ref	IRAS 12μm (Jy)	2.32^Ref	He II lines	-
R (mag)	15.92^Ref	IRAS 25μm (Jy)	1.10^Ref	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	0.40^Ref	O VI lines	-
BP (mag)	15.79^Ref	IRAS 100μm (Jy)	1.00^Ref
G (mag)	11.88^Ref	AKARI S09 (Jy)	2.25^Ref
RP (mag)	10.36^Ref	AKARI S18 (Jy)	1.36^Ref

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	M8^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	Mira^Ref
IR type	-	Luminosity (L_⊙)	-	Pulsation period (days)	342.18^Ref
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

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

Links

SIMBAD CDS Portal

Notes

Suspected of having a symbiotic nature by Jia et al. (2023) based on the machine-learning search. Identified as LAMOST J190359.17+491640.9 in that work. The spectra from the SDSS survey suggest an accreting-only nature. Previously classified as a Mira variable by Akerlof et al. (2000).

References

Akerlof, C., Amrose, S., Balsano, R. et al., 2000, AJ, 119, 4, 1901, 2000AJ....119.1901A
Jia, Y., Guo, S., Zhu, C. et al., 2023, RAA, 23, 10, 105012, 2023RAA....23j5012J

XX Dra