CXO J004318.8+412016

SUSPECTED M31  

Equatorial coordinates
α =  10.828546 | 00 43 18.851000
δ =  41.338478 | +41 20 18.520000
 
Constellation Andromeda
Symbiotic IR Type  
Spectral Type K or earlier
Magnitude range (V)  
Outbursts  

Identifiers

CXO J004318.8+412016 GSC TYC WRAY
SIMBAD RX J004318.6+412024 HIP SAO Hen
BD – IRAS  GAIA DR2  ESO
HD 2MASS  WISE  AAVSO

Position

Right ascension (°) 10.828546ref   Parallax (mas) Reddening E(B-V) (mag) 0.400 ± 0.065ref
Declination (°) 41.338478ref Distance (kpc) 785.00 ± 25.00ref    
Galactic longitude (°) 121.293050ref Proper motion in α (mas/yr)    
Galactic latitude (°) -21.507420ref Proper motion in δ (mas/yr)    

Observations

U (mag) 21.69ref X-Ray Yesref Flickering  
B (mag) 23.13ref X-Ray type αref Outbursts No
V (mag) 22.43ref IUE No Type  
R (mag) 21.94ref IRAS flux at 12 μm (Jy)   IPmax (eV) 35.1ref
I (mag) 21.00ref 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) 230ref γ velocity (km/h)   Size of giant’s orbit (AU)  
Eccentricity   RV of giant (km/h)   Separation (AU)  
Inclination (°) 0ref Inferior conj. of giant (JD)   Mass function  
Ephemeris type       Mass ratio 0.77ref
Ephemeris T(JD)          

Cool component

Spectral type K or earlierref Mass (M) 1ref Pulsation  
Eff. temperature (K) 4000ref Radius (R) 80ref Type  
IR type   Luminosity (L)   Pulsation period (days)  
Metallicity [Fe/H]       Ephemeris type  
        Ephemeris T(JD)  

Hot component

Type/Spectra WD/BH?ref Mass (M) 1.3ref Spin period (min)  
Eff. temperature (K) 775000ref Radius (R)   Accretion disk  
Lower limit (K)   Luminosity (L) 61.3ref    
Upper limit (K)          

Links

SIMBAD     CDS Portal


Notes

The continuum energy distribution and the spectral characteristics demonstrate the presence of a red giant of K or earlier spectral type (Orio et al., 2017). CXO J004318.8+412016 has been observed in X-rays as a luminous supersoft source (SSS) since 1979, with variable X-ray luminosity.


References

Last updated: Jan 12, 2019 @ 4:54 pm