2MASS J01113745-7159023


Equatorial coordinates
α =  17.906023 ± 0.051200 | 01 11 37.445523
δ =  -71.983988 ± 0.031600| -71 59 02.355336
Constellation Tucana
Symbiotic IR Type S
Spectral Type  
Magnitude range (V)  
Outbursts No


2MASS J01113745-7159023 GSC TYC WRAY
SIMBAD [MA93] 1748 HIP SAO Hen
BD – IRAS  GAIA DR2 4687524012639696896 ESO
HD 2MASS J01113745-7159023 WISE J011137.45-715902.3 AAVSO


Right ascension (°) 17.906023 ± 0.051200ref Parallax (mas) Reddening E(B-V) (mag) 0.061 ± 0.005ref
Declination (°)  -71.983988 ± 0.031600ref Distance (kpc) 62.10 ± 1.90ref    
Galactic longitude (°) 300.724687 ± 0.031600ref Proper motion in α (mas/yr) 0.885 ± 0.090ref    
Galactic latitude (°) -45.057652 ± 0.051200ref Proper motion in δ (mas/yr) -1.124 ± 0.063ref    


U (mag)   X-Ray   Flickering  
B (mag) 17.77ref X-Ray type   Outbursts No
V (mag) 16.00ref IUE No Type  
R (mag) 15.16ref IRAS flux at 12 μm (Jy)   IPmax (eV) 114.0ref
I (mag)   IRAS flux at 25 μm (Jy)   OVI lines Yesref
G (mag) 16.16ref IRAS flux at 60 μm (Jy)      
J (mag) 14.10ref IRAS flux at 100 μm (Jy)      
H (mag) 13.35ref WISE W1 (mag) 13.00ref    
K (mag) 13.11ref WISE W2 (mag) 13.07ref    
L (mag)   WISE W3 (mag) 12.57ref    
    WISE W4 (mag) 9.48ref    
    Radio flux (mJy)      


Orbital period (days) ~3500?ref 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   Mass (M)   Pulsation  
Eff. temperature (K) 3770ref Radius (R) 93ref 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) 410-440ref    
Upper limit (K) 230000ref        


SIMBAD     CDS Portal


The symbiotic nature of 2MASS J01113745-7159023 was noticed by Massay & Duffy (2001).  Its variability is similar to the variability observed in GX 1+4, a symbiotic X-ray binary. This suggested an enhanced mass-transfer during a periastron passage during orbital motion. This is particularly interesting because WD in 2MASS J01113745- 7159023 is among the hottest in SySt, which confirms high mass transfer rate in the system or a recent outburst (Iłkiewicz et al., 2018).


  • Iłkiewicz, K., Mikołajewska, J., Shara, M. M., et al., 2018, arXiv e-prints, arXiv:1811.06696, submitted to ApJ, 2018arXiv181106696I
  • Massey, P., Duffy, A. S., 2001, ApJ, 550, 713, 2001ApJ…550..713M

Last updated: May 11, 2019 @ 12:30 pm