M31SyS J004433.74+414402.8


Equatorial coordinates
α =  11.140557 ± 2.387600 | 00 44 33.733791
δ =  41.734082 ± 4.235800 | +41 44 02.696878
Constellation Andromeda
Symbiotic IR Type S
Spectral Type M4
Magnitude range (V)  
Outbursts No


M31SyS J004433.74+414402.8 GSC TYC WRAY
SIMBAD  M31SyS J004433.74+414402.8 HIP SAO Hen
BD – IRAS  GAIA DR2 381302626698638080 ESO
HD 2MASS  J00443374+4144032 WISE  AAVSO


Right ascension (°) 11.140557 ± 2.387600ref  Parallax (mas) Reddening E(B-V) (mag) 0.208 ± 0.024ref
Declination (°) 41.734082 ± 4.235800ref Distance (kpc) 785.00 ± 25.00ref    
Galactic longitude (°) 121.556899 ± 4.235800ref Proper motion in α (mas/yr)    
Galactic latitude (°) -21.119310 ± 2.387600ref Proper motion in δ (mas/yr)    


U (mag) 20.93ref X-Ray   Flickering  
B (mag) 21.29ref X-Ray type   Outbursts No
V (mag) 20.82ref IUE No Type  
R (mag)   IRAS flux at 12 μm (Jy)   IPmax (eV) 114.0ref
I (mag) 19.07ref IRAS flux at 25 μm (Jy)   OVI lines Yesref
G (mag) 21.17ref IRAS flux at 60 μm (Jy)      
J (mag) 16.97ref IRAS flux at 100 μm (Jy)      
H (mag) 15.98ref WISE W1 (mag)      
K (mag) 15.52ref WISE W2 (mag)      
L (mag)   WISE W3 (mag)      
    WISE W4 (mag)      
    Radio flux (mJy)      


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 M4ref Mass (M)   Pulsation Yes?ref
Eff. temperature (K)   Radius (R)   Type SR pulsation?ref
IR type Sref Luminosity (L)   Pulsation period (days) 34?ref
Metallicity [Fe/H]       Ephemeris type  
        Ephemeris T(JD)  

Hot component

Type/Spectra   Mass (M)   Spin period (min)  
Eff. temperature (K)   Radius (R)   Accretion disk  
Lower limit (K) 100000ref Luminosity (L)      
Upper limit (K) 145000ref        


SIMBAD     CDS Portal


Bonanos et al. (2003) report a variable red star, D31 J004433.7+414403.0, which they tentatively classify as Type II Cepheid. According to Mikołajewska et al. (2014), it may be M31SyS J004433.74+414402.8 and the 34-d periodicity would then reflect a SR pulsation of the red component. 


Last updated: Jan 14, 2019 @ 2:16 pm