[LDB2002] 431

SUSPECTED NGC 6822  

Equatorial coordinates
α =  296.228880 | 19 44 54.930000
δ =  -14.720120 | -14 43 12.430000
 
Constellation Sagittarius
Symbiotic IR Type  
Spectral Type C
Magnitude range (V)  
Outbursts No

Identifiers

[LDB2002] 431 GSC TYC WRAY
SIMBAD [LDB2002] 431 HIP SAO Hen
BD – IRAS  GAIA DR2 ESO
HD 2MASS  WISE  AAVSO

Position

Right ascension (°) 296.228880ref Parallax (mas) Reddening E(B-V) (mag) 0.190 ± 0.005ref
Declination (°) -14.720120ref Distance (kpc) 500.00 ± 10.00ref    
Galactic longitude (°) 25.414723ref Proper motion in α (mas/yr)    
Galactic latitude (°) -18.354807ref 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) 17.50ref IRAS flux at 100 μm (Jy)      
H (mag) 16.56ref WISE W1 (mag)      
K (mag) 16.30ref 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   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 @ 10:31 am