M33SyS J013457.79+310054.2

CONFIRMED M33  

Equatorial coordinates
α =  23.740704 | 01 34 57.769000
δ =  31.015116 | +31 00 54.420000
 
Constellation Triangulum
Symbiotic IR Type  
Spectral Type M4
Magnitude range (V)  
Outbursts No

Identifiers

M33SyS J013457.79+310054.2 GSC TYC WRAY
SIMBAD M33SyS J013457.79+310054.2 HIP SAO Hen
BD – IRAS  GAIA DR2  ESO
HD 2MASS  WISE  AAVSO

Position

Right ascension (°) 23.740704ref   Parallax (mas) Reddening E(B-V) (mag) 0.042 ± 0.001ref
Declination (°) 31.015116ref Distance (kpc) 847.00 ± 60.00ref    
Galactic longitude (°) 133.804031ref Proper motion in α (mas/yr)    
Galactic latitude (°) -30.936107ref Proper motion in δ (mas/yr)    

Observations

U (mag)   X-Ray   Flickering  
B (mag)   X-Ray type   Outbursts No
V (mag) 23.52ref IUE No Type  
R (mag) 21.95ref IRAS flux at 12 μm (Jy)   IPmax (eV) 114.0ref
I (mag) 20.54ref IRAS flux at 25 μm (Jy)   OVI lines Yesref
G (mag)   IRAS flux at 60 μm (Jy)      
J (mag) 18.90ref IRAS flux at 100 μm (Jy)      
H (mag) 17.96ref WISE W1 (mag)      
K (mag) 17.92ref WISE W2 (mag)      
L (mag)   WISE W3 (mag)      
    WISE W4 (mag)      
    Radio      
    Radio flux (mJy)      

Orbit

Orbital period (days) >300ref 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  
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)   Radius (R)   Accretion disk  
Lower limit (K) 114000ref Luminosity (L)      
Upper limit (K) 176000ref        

Links

SIMBAD     CDS Portal


Notes

Variability of this system is probably due to orbital motion (Mikołajewska et al., 2017).


References

  • Mikołajewska, J., Shara, M. M., Caldwell, N., et al., 2017, MNRAS, 465, 699, 2017MNRAS.465.1699M

Last updated: Jan 13, 2019 @ 1:05 pm