[LDB2002] 228

SUSPECTED NGC 6822  

Equatorial coordinates
α =  296.186090 | 19 44 44.660000
δ =  -14.778700 | -14 46 43.320000
 
Constellation Sagittarius
Symbiotic IR Type S
Spectral Type C
Magnitude range (V)  
Outbursts No

Identifiers

[LDB2002] 228 GSC TYC WRAY
SIMBAD [LDB2002] 228 HIP SAO Hen
BD – IRAS  GAIA DR2 ESO
HD 2MASS  WISE  AAVSO

Position

Right ascension (°) 296.186090ref Parallax (mas) Reddening E(B-V) (mag) 0.203 ± 0.010ref
Declination (°) -14.778700ref Distance (kpc) 500.00 ± 10.00ref    
Galactic longitude (°) 25.340566ref Proper motion in α (mas/yr)    
Galactic latitude (°) -18.341042ref Proper motion in δ (mas/yr)    

Observations

U (mag)   X-Ray   Flickering  
B (mag)   X-Ray type   Outbursts No
V (mag)   IUE No Type  
R (mag)   IRAS flux at 12 μm (Jy)   IPmax (eV)  
I (mag)   IRAS flux at 25 μm (Jy)   OVI lines  
G (mag)   IRAS flux at 60 μm (Jy)      
J (mag) 16.72ref IRAS flux at 100 μm (Jy)      
H (mag) 15.90ref WISE W1 (mag)      
K (mag) 15.54ref WISE W2 (mag)      
L (mag)   WISE W3 (mag)      
    WISE W4 (mag)      
    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 Cref Mass (M)   Pulsation  
Eff. temperature (K)   Radius (R)   Type  
IR type Sref 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)   Luminosity (L)      
Upper limit (K)          

Links

SIMBAD     CDS Portal


Notes

It was suspected to be a symbiotic star based on its spectra by Sibbons et al. (2015).


References

  • Sibbons, L. F., Ryan, S. G., Napiwotzki, R., et al., 2015, A&A, 574, A102, 2015A&A…574A.102S

Last updated: May 13, 2019 @ 11:18 am