SMC2

CONFIRMED SMC  

Equatorial coordinates
α =  10.699507 ± 0.039136 | 00 42 47.878840
δ =  -74.700013 ± 0.030554 | -74 42 00.030207
 
Constellation Hydrus
Symbiotic IR Type S🡕
Spectral Type G-K
Magnitude range (V)  
Outbursts Yes

Identifiers

SMC2 GSC TYC WRAY
SIMBAD NAME SMC Symbiotic star 2 HIP SAO Hen
BD – IRAS  GAIA DR2 4685466134869593728 ESO
HD 2MASS J00424786-7442001 WISE J004247.87-744200.0 AAVSO 000-BLT-628

Position

Right ascension (°) 10.699507 ± 0.039136ref  Parallax (mas) Reddening E(B-V) (mag) 0.041 ± 0.001ref
Declination (°) -74.700013 ± 0.030554ref Distance (kpc) 62.10 ± 1.90ref    
Galactic longitude (°) 303.703778 ± 0.030554ref Proper motion in α (mas/yr) 0.705148 ± 0.075371ref    
Galactic latitude (°) -42.415291 ± 0.039136ref Proper motion in δ (mas/yr) -1.103215 ± 0.057714ref    

Observations

U (mag)   X-Ray Noref Flickering  
B (mag)   X-Ray type   Outbursts Yesref
V (mag) 16.52ref IUE Yes Type  
R (mag) 14.90ref IRAS flux at 12 μm (Jy)   IPmax (eV) 114.0ref
I (mag) 15.06ref IRAS flux at 25 μm (Jy)   OVI lines Yesref
G (mag) 16.09ref IRAS flux at 60 μm (Jy)      
J (mag) 14.04ref IRAS flux at 100 μm (Jy)      
H (mag) 13.34ref WISE W1 (mag) 13.00ref    
K (mag) 13.10ref WISE W2 (mag) 12.94ref    
L (mag)   WISE W3 (mag) 12.33ref    
    WISE W4 (mag) 9.14ref    
    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 G-Kref, Mass (M)   Pulsation  
Eff. temperature (K) 3837ref Radius (R)   Type  
IR type S🡕, ref 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) 200000ref Radius (R)   Accretion disk  
Lower limit (K)   Luminosity (L) 300ref    
Upper limit (K)          

Links

SIMBAD     CDS Portal     VSX


Notes

There were outbursts observed in the case of the star SMC2 (Morgan, 1992).


References

Last updated: May 2, 2019 @ 11:28 am