New Online Database of Symbiotic Variables: EG Lac

Constellation
Lacerta

Equatorial coordinates
α = 22 50 38.920
δ = +55 14 51.989

Galactic coordinates
l = 106.2356°
b = -3.6595°

Suspected	2000^Ref
Confirmed	-
Symbiotic IR type	-
Hot component type	-
Outbursts	-

Identifiers

EG Lac	IRAS -	GSC2.4.2 N1CS231926	AAVSO 000-BCQ-872
SIMBAD V* EG Lac	Pan-STARRS 174293426621188042	SAO -	VSX 16740
GAIA DR3 2003591252779324544	SkyMapper -	WRAY -	GCVS EG Lac
2MASS -	HIP -	Hen -	BD -
WISE -	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 (°)	342.6622^Ref	Parallax (mas)	1.120±0.286^Ref	Reddening E(B-V) (mag)	0.61±0.01^Ref ^{, Note}
Declination (°)	55.2478^Ref	Distance (kpc)	1.39^Ref ^{, Note}, 1.31^Ref ^{, Note}
Galactic longitude (°)	106.2356^Ref	Proper motion in α (mas/yr)	5.03±0.14^Ref
Galactic latitude (°)	-3.6595^Ref	Proper motion in δ (mas/yr)	0.83±0.15^Ref

Observations

X-Ray	-	IR type	-	Radio	-
X-Ray type	-	J (mag)	-	Flickering	-
GALEX FUV (mag)	-	H (mag)	-	Outbursts	-
GALEX NUV (mag)	-	K (mag)	-	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	-	Jets	-
FUSE	No^Ref	WISE W2 (mag)	-	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	-	IPmax (eV)	-
B (mag)	-	WISE W4 (mag)	-	[O III] lines	-
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	-
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	-
BP (mag)	19.47^Ref	IRAS 100μm (Jy)	-
G (mag)	19.67^Ref	AKARI S09 (Jy)	-
RP (mag)	18.77^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	-	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	-
IR type	-	Luminosity (L_⊙)	-	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

In Kinnunen & Skiff (2000), a symbiotic nature was suspected, preferred over a dwarf nova. Additionally, they reported that Downes & Shara (1993) marked the wrong star on the finding chart.

References

Downes, R. A., Shara, M. M., 1993, PASP, 105, 127, 1993PASP..105..127D
Kinnunen, T., Skiff, B. A., 2000, IBVS, 4906, 1, 2000IBVS.4906....1K

EG Lac