2MASS J01104404-7208464


Equatorial coordinates
α =  17.683444 ± 0.045900 | 01 10 44.026463
δ =  -72.146233 ± 0.032500 | -72 08 46.439622
Constellation Tucana
Symbiotic IR Type S
Spectral Type  
Magnitude range (V)  
Outbursts No


2MASS J01104404-7208464 GSC TYC WRAY
SIMBAD [MA93] 1725 HIP SAO Hen
BD – IRAS  GAIA DR2 4687517449929997824 ESO
HD 2MASS J01104404-7208464 WISE J011044.03-720846.4 AAVSO


Right ascension (°) 17.683444 ± 0.045900ref  Parallax (mas) Reddening E(B-V) (mag) 0.087 ± 0.004ref
Declination (°) -72.146233 ± 0.032500ref Distance (kpc) 62.10 ± 1.90ref    
Galactic longitude (°) 300.845846 ± 0.032500ref Proper motion in α (mas/yr) 0.496000 ± 0.107000ref    
Galactic latitude (°) -44.903778 ± 0.045900ref Proper motion in δ (mas/yr) -1.171000 ± 0.064000ref    


U (mag) 17.77ref X-Ray   Flickering  
B (mag) 17.53ref X-Ray type   Outbursts No
V (mag) 16.40ref IUE No Type  
R (mag) 15.82ref IRAS flux at 12 μm (Jy)   IPmax (eV) 114.0ref
I (mag) 14.94ref IRAS flux at 25 μm (Jy)   OVI lines Yesref
G (mag) 15.95ref IRAS flux at 60 μm (Jy)      
J (mag) 13.90ref IRAS flux at 100 μm (Jy)      
H (mag) 13.11ref WISE W1 (mag) 12.88ref    
K (mag) 13.00ref WISE W2 (mag) 12.88ref    
L (mag)   WISE W3 (mag) 12.86ref    
    WISE W4 (mag) 9.50ref    
    Radio flux (mJy)      


Orbital period (days) 403 ± 8ref 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 Min(V)ref     Mass ratio  
Ephemeris T(JD) 2454792ref        

Cool component

Spectral type   Mass (M)   Pulsation  
Eff. temperature (K) 3970ref Radius (R) 98ref Type  
IR type Sref Luminosity (L)   Pulsation period (days)  
Metallicity [Fe/H]       Ephemeris type  
        Ephemeris T(JD)  

Hot component

Type/Spectra WDref Mass (M)   Spin period (min)  
Eff. temperature (K)   Radius (R)   Accretion disk  
Lower limit (K)   Luminosity (L) 230-240ref    
Upper limit (K) 160000ref        


SIMBAD     CDS Portal


2MASS J01104404-7208464 is an ellipsoidal variable with an orbital period of 403 d and also experienced a brightening by ∼0.2 mag in V band, which was associated with a change of shape of orbitally related variability (Iłkiewicz et al., 2018).


  • Iłkiewicz, K., Mikołajewska, J., Shara, M. M., et al., 2018, arXiv e-prints, arXiv:1811.06696, submitted to ApJ, 2018arXiv181106696I

Last updated: Jan 14, 2019 @ 3:06 pm