SMC N73

CONFIRMED SMC  

Equatorial coordinates
α =  16.163797 ± 0.022927 | 01 04 39.306394
δ =  -75.806885 ± 0.019812 | -75 48 24.765843
 
Constellation Hydrus
Symbiotic IR Type S🡕
Spectral Type K7
Magnitude range (V)  
Outbursts No

Identifiers

SMC N73 GSC TYC WRAY
SIMBAD LHA 115-N 73 HIP SAO Hen
BD – IRAS  GAIA DR2 4636419124474360448 ESO
HD 2MASS J01043930-7548247 WISE  J010439.30-754824.7 AAVSO 000-BLT-630

Position

Right ascension (°) 16.163797 ± 0.022927ref  Parallax (mas) Reddening E(B-V) (mag) 0.044 ± 0.001ref
Declination (°) -75.806885 ± 0.019812ref Distance (kpc) 62.10 ± 1.90ref    
Galactic longitude (°) 301.854131 ± 0.019812ref Proper motion in α (mas/yr) 1.158752 ± 0.041509ref    
Galactic latitude (°) -41.293699 ± 0.022927ref Proper motion in δ (mas/yr) -1.352465 ± 0.037801ref    

Observations

U (mag)   X-Ray No Flickering  
B (mag) 17.30ref X-Ray type   Outbursts No
V (mag) 15.60ref IUE Yes Type  
R (mag) 15.52ref IRAS flux at 12 μm (Jy)   IPmax (eV) 114.0ref
I (mag) 13.88ref IRAS flux at 25 μm (Jy)   OVI lines Yesref
G (mag) 15.02ref IRAS flux at 60 μm (Jy)      
J (mag) 15.55ref IRAS flux at 100 μm (Jy)      
H (mag) 11.71ref WISE W1 (mag) 11.37ref    
K (mag) 11.49ref WISE W2 (mag) 11.46ref    
L (mag)   WISE W3 (mag) 11.27ref    
    WISE W4 (mag) 9.03ref    
    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 K7ref Mass (M)   Pulsation  
Eff. temperature (K) 3850ref Radius (R) 150ref Type  
IR type S🡕, ref Luminosity (L) 4500ref Pulsation period (days)  
Metallicity [Fe/H]       Ephemeris type  
        Ephemeris T(JD)  

Hot component

Type/Spectra   Mass (M)   Spin period (min)  
Eff. temperature (K) 130000 ± 10000ref Radius (R) 0.10ref Accretion disk  
Lower limit (K)   Luminosity (L) 3000 ± 1000ref    
Upper limit (K)          

Links

SIMBAD     CDS Portal     VSX


Notes

Proposed to be a symbiotic star based on a visibility of a strong UV continuum with TiO and a strong He II λ4686 emission line.


References

Last updated: May 2, 2019 @ 11:27 am