KO Her

SUSPECTED MILKY WAY
 
Constellation
Hercules
Equatorial coordinates
α = 16 53 19.248
δ = +33 09 58.136
Galactic coordinates
l = 55.2345°
b = 38.0712°

Suspected 2023Ref
Confirmed -
Symbiotic IR type -
Hot component type -
Outbursts -

Identifiers

KO Her IRAS - GSC2.4.2 N3FL023632 AAVSO 000-BDR-217
SIMBAD V* KO Her Pan-STARRS 147802533303290096 SAO - VSX 15059
GAIA DR3 1314500618120513024 SkyMapper - WRAY - GCVS KO Her
2MASS J16531924+3309580 HIP - Hen - BD -
WISE J165319.24+330958.1 TYC 2593-197-1 ESO - HD -

Symbiotic Catalogs

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

Position

Right ascension (°) 253.3302Ref Parallax (mas) 0.254±0.022Ref Reddening E(B-V) (mag) 0.02±0.0Ref, Note
Declination (°) 33.1661Ref Distance (kpc) 3.31Ref, Note, 3.36Ref, Note    
Galactic longitude (°) 55.2345Ref Proper motion in α (mas/yr) -9.13±0.02Ref    
Galactic latitude (°) 38.0712Ref Proper motion in δ (mas/yr) 1.71±0.02Ref    

Observations

X-Ray - IR type - Radio -
X-Ray type - J (mag) 7.30Ref Flickering -
GALEX FUV (mag) 22.28Ref H (mag) 6.46Ref Outbursts -
GALEX NUV (mag) 22.95Ref K (mag) 6.12Ref Outburst type -
IUE NoRef WISE W1 (mag) 6.04Ref Jets -
FUSE NoRef WISE W2 (mag) 6.07Ref Resolved nebula -
U (mag) - WISE W3 (mag) 5.72Ref IPmax (eV) -
B (mag) 14.17Ref WISE W4 (mag) 5.42Ref [O III] lines -
V (mag) 12.68Ref IRAS 12μm (Jy) - He II lines -
R (mag) 12.25Ref IRAS 25μm (Jy) - [Fe VII] lines -
I (mag) - IRAS 60μm (Jy) - O VI lines -
BP (mag) 12.63Ref IRAS 100μm (Jy) -
G (mag) 10.72Ref AKARI S09 (Jy) 0.25Ref
RP (mag) 9.42Ref AKARI S18 (Jy) -

Orbit

Orbital period (days) - γ velocity (km/h) -12.87±0.42Ref Size of giant’s orbit (AU) -
Eccentricity - RV of giant (km/h) - Separation (AU) -
Inclination (°) - Inferior conj. of giant (JD) - Mass function -
Eclipses -     Mass ratio -
Orbital ephemeris -        

Cool component

Spectral type MRef Mass (M) - Pulsation Yes?Ref
Eff. temperature (K) - Radius (R) - Type SR?Ref
IR type - Luminosity (L) - Pulsation period (days) 661.6351211Ref
Metallicity [Fe/H] -     Pulsation ephemeris -

Hot component

Type/Spectral type WDRef 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 having a symbiotic nature by Akras (2023). The authors employed a combination of GALEX UV photometry, 2MASS/WISE IR photometry, and the ASAS-SN variables catalog to select the candidates.


References


Last updated: January 31, 2023