SS 305

CONFIRMED MILKY WAY
 
Constellation
Ophiucus
Equatorial coordinates
α = 17 21 33.851
δ = +01 50 11.299
Galactic coordinates
l = 23.9702°
b = 20.7670°

Suspected 2023Ref
Confirmed 2023Ref
Symbiotic IR type SRef
Hot component type shell-burningRef
Outbursts -

Identifiers

SS 305 IRAS - GSC2.4.2 N3BL000009 AAVSO -
SIMBAD ATO J260.3910+01.8365 Pan-STARRS 110202603910014287 SAO - VSX 572308
GAIA DR3 4387125994117106816 SkyMapper - WRAY - GCVS -
2MASS J17213383+0150117 HIP - Hen - BD -
WISE J172133.84+015011.5 TYC - 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 (°) 260.3910Ref Parallax (mas) 0.118±0.021Ref Reddening E(B-V) (mag) 0.17±0.01Ref, Note
Declination (°) 1.8365Ref Distance (kpc) 7.65Ref, Note, 6.19Ref, Note    
Galactic longitude (°) 23.9702Ref Proper motion in α (mas/yr) -2.51±0.02Ref    
Galactic latitude (°) 20.7670Ref Proper motion in δ (mas/yr) -7.09±0.01Ref    

Observations

X-Ray - IR type SRef Radio -
X-Ray type - J (mag) 9.15Ref Flickering -
GALEX FUV (mag) 15.78Ref H (mag) 8.18Ref Outbursts -
GALEX NUV (mag) 16.41Ref K (mag) 7.88Ref Outburst type -
IUE NoRef WISE W1 (mag) 7.79Ref Jets -
FUSE NoRef WISE W2 (mag) 7.88Ref Resolved nebula -
U (mag) - WISE W3 (mag) 7.51Ref IPmax (eV) 54.4Ref
B (mag) 14.98Ref WISE W4 (mag) 6.98Ref [O III] lines YesRef
V (mag) 13.79Ref IRAS 12μm (Jy) - He II lines YesRef
R (mag) - IRAS 25μm (Jy) - [Fe VII] lines NoRef
I (mag) - IRAS 60μm (Jy) - O VI lines NoRef
BP (mag) 13.89Ref IRAS 100μm (Jy) -
G (mag) 12.41Ref AKARI S09 (Jy) -
RP (mag) 11.18Ref AKARI S18 (Jy) -

Orbit

Orbital period (days) - γ velocity (km/h) -97.35±15.52Ref 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 - Mass (M) - Pulsation Yes?Ref
Eff. temperature (K) - Radius (R) - Type SR?Ref
IR type SRef Luminosity (L) - Pulsation period (days) 459.11Ref
Metallicity [Fe/H] -     Pulsation ephemeris -

Hot component

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

Links

SIMBAD   CDS Portal


Notes

Selected as a potential symbiotic star by Akras (2023), based on GALEX UV photometry, 2MASS/WISE IR photometry, and the ASAS-SN variables catalog. Their spectroscopic observations confirmed the symbiotic nature of this star. It was previously classified as an emission-line star by Stephenson & Sanduleak (1977).


References


Last updated: January 31, 2023