V748 Cen

POSSIBLE MILKY WAY
 
Constellation
Centaurus
Equatorial coordinates
α = 14 59 36.672
δ = -33 25 04.143
Galactic coordinates
l = 331.5163°
b = 22.2438°

Suspected 1986Ref
Confirmed -
Symbiotic IR type S?Ref
Hot component type -
Outbursts YesRef

Identifiers

V748 Cen IRAS - GSC2.4.2 S9H9000102 AAVSO 000-BDK-920
SIMBAD V* V748 Cen Pan-STARRS - SAO - VSX 8045
GAIA DR3 6204217186929931520 SkyMapper 145936.68-332504.0 WRAY - GCVS V0748 Cen
2MASS J14593668-3325040 HIP - Hen 3-1045 BD -
WISE J145936.67-332504.1 TYC 7302-2324-1 ESO - HD -

Symbiotic Catalogs

Bidelman (1954) - Allen (1984) - Belzcyński et al. (2001) V748 Cen (Susp.)
Gaposchkin (1957) - Kenyon (1986) V748 Cen (Susp.) Akras et al. (2019) V748 Cen (Susp.)
Boyarchuk (1969) - Vaidis (1988, 1991) V748 Cen (Conf.)

Position

Right ascension (°) 224.9028Ref Parallax (mas) 0.105±0.031Ref Reddening E(B-V) (mag) 0.12±0.0Ref, Note
Declination (°) -33.4178Ref Distance (kpc) 7.01Ref, Note, 7.23Ref, Note    
Galactic longitude (°) 331.5163Ref Proper motion in α (mas/yr) -6.18±0.04Ref    
Galactic latitude (°) 22.2438Ref Proper motion in δ (mas/yr) -5.45±0.04Ref    

Observations

X-Ray NoRef IR type S?Ref Radio -
X-Ray type - J (mag) 9.20Ref Flickering -
GALEX FUV (mag) - H (mag) 8.40Ref Outbursts YesRef
GALEX NUV (mag) - K (mag) 8.12Ref Outburst type -
IUE NoRef WISE W1 (mag) 7.96Ref Jets -
FUSE NoRef WISE W2 (mag) 7.94Ref Resolved nebula -
U (mag) - WISE W3 (mag) 7.58Ref IPmax (eV) 13.6Ref
B (mag) 11.53Ref WISE W4 (mag) 7.17Ref [O III] lines NoRef
V (mag) 11.27Ref IRAS 12μm (Jy) - He II lines NoRef
R (mag) - IRAS 25μm (Jy) - [Fe VII] lines NoRef
I (mag) - IRAS 60μm (Jy) - O VI lines NoRef
BP (mag) 11.40Ref IRAS 100μm (Jy) -
G (mag) 11.07Ref AKARI S09 (Jy) -
RP (mag) 10.48Ref AKARI S18 (Jy) -

Orbit

Orbital period (days) 566.5Ref 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 -
Eclipses YesRef     Mass ratio -
Orbital ephemeris Min (V) = 2441917 + 566.5 x ERef        

Cool component

Spectral type M4-5 IIIRef, M3 IIIRef Mass (M) - Pulsation -
Eff. temperature (K) - Radius (R) - Type -
IR type S?Ref Luminosity (L) - Pulsation period (days) -
Metallicity [Fe/H] -     Pulsation ephemeris -

Hot component

Type/Spectral type - Mass (M) - Spin period (min) -
Shell-burning/Accreting-only - Radius (R) - Accretion disk -
Eff. temperature (K) - Luminosity (L) -    
Lower limit (K) -        
Upper limit (K) -        

Links

SIMBAD   CDS Portal


Notes

Suspected of being a symbiotic star by Kenyon (1986), the system exhibits characteristics such as an M giant continuum, UV excess, and emission lines with low ionization potential (van Genderen et al., 1974; van Genderen, 1979,Schulte-Ladbeck, 1988). Eclipses have been observed in the system (van Genderen et al., 1974; van Genderen, 1979). The symbiotic nature is further supported by the analysis presented in Akras et al. (2019).


References


Last updated: June 2, 2021