EG Lac

SUSPECTED MILKY WAY
 
Constellation
Lacerta
Equatorial coordinates
α = 22 50 38.920
δ = +55 14 51.989
Galactic coordinates
l = 106.2356°
b = -3.6595°

Suspected 2000Ref
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 (°) 342.6622Ref Parallax (mas) 1.120±0.286Ref Reddening E(B-V) (mag) 0.61±0.01Ref, Note
Declination (°) 55.2478Ref Distance (kpc) 1.39Ref, Note, 1.31Ref, Note    
Galactic longitude (°) 106.2356Ref Proper motion in α (mas/yr) 5.03±0.14Ref    
Galactic latitude (°) -3.6595Ref Proper motion in δ (mas/yr) 0.83±0.15Ref    

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 NoRef WISE W1 (mag) - Jets -
FUSE NoRef 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) 19.47Ref IRAS 100μm (Jy) -
G (mag) 19.67Ref AKARI S09 (Jy) -
RP (mag) 18.77Ref 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


Last updated: December 3, 2021