THA 23-30

CONFIRMED MILKY WAY
 
Constellation
Ophiucus
Equatorial coordinates
α = 16 50 02.887
δ = -23 05 17.272
Galactic coordinates
l = 357.6870°
b = 13.5816°

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

Identifiers

THA 23-30 IRAS - GSC2.4.2 S8IH151443 AAVSO -
SIMBAD THA 23-30 Pan-STARRS 80292525117744529 SAO - VSX 571455
GAIA DR3 4125688650452414848 SkyMapper 165002.89-230517.7 WRAY - GCVS -
2MASS J16500289-2305178 HIP - Hen - BD -
WISE J165002.89-230517.7 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 (°) 252.5120Ref Parallax (mas) 0.019±0.016Ref Reddening E(B-V) (mag) 0.43±0.02Ref, Note
Declination (°) -23.0883Ref Distance (kpc) 11.15Ref, Note, 9.69Ref, Note    
Galactic longitude (°) 357.6870Ref Proper motion in α (mas/yr) -4.91±0.02Ref    
Galactic latitude (°) 13.5816Ref Proper motion in δ (mas/yr) -1.86±0.01Ref    

Observations

X-Ray - IR type SRef Radio -
X-Ray type - J (mag) 9.89Ref Flickering -
GALEX FUV (mag) 18.38Ref H (mag) 8.94Ref Outbursts -
GALEX NUV (mag) 18.59Ref K (mag) 8.62Ref Outburst type -
IUE NoRef WISE W1 (mag) 8.53Ref Jets -
FUSE NoRef WISE W2 (mag) 8.58Ref Resolved nebula -
U (mag) - WISE W3 (mag) 8.26Ref IPmax (eV) 114Ref
B (mag) 16.20Ref WISE W4 (mag) 7.72Ref [O III] lines YesRef
V (mag) 14.60Ref IRAS 12μm (Jy) - He II lines YesRef
R (mag) 14.27Ref IRAS 25μm (Jy) - [Fe VII] lines NoRef
I (mag) - IRAS 60μm (Jy) - O VI lines YesRef
BP (mag) 14.82Ref IRAS 100μm (Jy) -
G (mag) 13.17Ref AKARI S09 (Jy) -
RP (mag) 11.93Ref AKARI S18 (Jy) -

Orbit

Orbital period (days) - γ velocity (km/h) -37.55±0.61Ref 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 M1Ref Mass (M) - Pulsation Yes?Ref
Eff. temperature (K) - Radius (R) - Type SR?Ref
IR type SRef Luminosity (L) - Pulsation period (days) 334.37Ref
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 The & Lim (1964).


References


Last updated: January 31, 2023