NGC 205 SySt-1

CONFIRMED NGC 205  

Equatorial coordinates
α =  10.073333 | 00 40 17.600000
δ =  41.698139 | +41 41 53.300000
 
Constellation Andromeda
Symbiotic IR Type  
Spectral Type M2 III
Magnitude range (V)  
Outbursts No

Identifiers

NGC 205 SySt-1 GSC TYC WRAY
SIMBAD NAME NGC 205 SySt-1 HIP SAO Hen
BD – IRAS  GAIA DR2  ESO
HD 2MASS  WISE  AAVSO

Position

Right ascension (°) 10.073333ref   Parallax (mas) Reddening E(B-V) (mag) 0.066 ± 0.004ref
Declination (°) 41.698139ref  Distance (kpc) 824.00 ± 27.00ref    
Galactic longitude (°) 120.702051ref  Proper motion in α (mas/yr)    
Galactic latitude (°) -21.125354ref  Proper motion in δ (mas/yr)    

Observations

U (mag)   X-Ray   Flickering  
B (mag)   X-Ray type   Outbursts No
V (mag)   IUE No Type  
R (mag)   IRAS flux at 12 μm (Jy)   IPmax (eV) 114.0ref 
I (mag)   IRAS flux at 25 μm (Jy)   OVI lines Yesref 
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 M2 IIIref  Mass (M)   Pulsation  
Eff. temperature (K) 2800ref  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) >340000ref  Radius (R)   Accretion disk  
Lower limit (K)   Luminosity (L)      
Upper limit (K)          

Links

SIMBAD     CDS Portal


Notes

NGC 205 SySt-1 shows the OVI Raman-scattered lines and the absorption features of the M giant component are also clearly seen. 


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 @ 1:30 pm