NGC 205 SySt-3

SUSPECTED NGC 205  

Equatorial coordinates
α =  10.087080 | 00 40 20.900000
δ =  41.694970 | +41 41 41.900000
 
Constellation Andromeda
Symbiotic IR Type  
Spectral Type K5-M2
Magnitude range (V)  
Outbursts No

Identifiers

NGC 205 SySt-3 GSC TYC WRAY
SIMBAD [MMD2006] 2641 HIP SAO Hen
BD – IRAS  GAIA DR2  ESO
HD 2MASS  WISE  AAVSO

Position

Right ascension (°) 10.087080ref   Parallax (mas) Reddening E(B-V) (mag) 0.067 ± 0.004ref
Declination (°) 41.694970ref Distance (kpc) 824.00 ± 27.00ref    
Galactic longitude (°) 120.712890ref Proper motion in α (mas/yr)    
Galactic latitude (°) -21.128990ref Proper motion in δ (mas/yr)    

Observations

U (mag)   X-Ray   Flickering  
B (mag)   X-Ray type   Outbursts No
V (mag) 23.47ref  IUE No Type  
R (mag)   IRAS flux at 12 μm (Jy)   IPmax (eV) 54.9ref
I (mag)   IRAS flux at 25 μm (Jy)   OVI lines Noref
G (mag)   IRAS flux at 60 μm (Jy)      
J (mag)   IRAS flux at 100 μm (Jy)      
H (mag)   WISE W1 (mag)      
K (mag)   WISE W2 (mag)      
L (mag)   WISE W3 (mag)      
    WISE W4 (mag)      
    Radio      
    Radio flux (mJy)      

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  
Ephemeris type       Mass ratio  
Ephemeris T(JD)          

Cool component

Spectral type K5-M2ref Mass (M)   Pulsation  
Eff. temperature (K)   Radius (R)   Type  
IR type   Luminosity (L)   Pulsation period (days)  
Metallicity [Fe/H]       Ephemeris type  
        Ephemeris T(JD)  

Hot component

Type/Spectra   Mass (M)   Spin period (min)  
Eff. temperature (K) ∼270000ref Radius (R)   Accretion disk  
Lower limit (K)   Luminosity (L)      
Upper limit (K)          

Links

SIMBAD     CDS Portal


Notes

NGC 205 SySt-3 was classified as a suspected symbiotic in Gonçalves et al. (2015) because of the presence of a cool stellar continuum in the red part of its spectrum, compatible with that of an M giant and forbidden lines of moderate to high ionization, like [Fe V] 4180 Å.


References

  • Gonçalves, D. R., Magrini, L., de la Rosa, I. G., et al., 2015, MNRAS, 447, 93, 2015MNRAS.447..993G

Last updated: Jan 12, 2019 @ 4:29 pm