CL Sco

CONFIRMED MILKY WAY
 
Constellation
Scorpius
Equatorial coordinates
α = 16 54 51.967
δ = -30 37 18.270
Galactic coordinates
l = 352.3224°
b = 8.0890°

Suspected 1943Ref
Confirmed 1943Ref
Symbiotic IR type SRef
Hot component type shell-burningRef
Outbursts YesRef - Z AndRef

Identifiers

CL Sco IRAS - GSC2.4.2 S8ET000688 AAVSO 000-BBY-156
SIMBAD V* CL Sco Pan-STARRS 71252537165754216 SAO - VSX 32928
GAIA DR3 6027978628476711808 SkyMapper 165451.96-303718.2 WRAY 15-1564 GCVS CL Sco
2MASS J16545198-3037181 HIP - Hen 3-1286 BD -
WISE J165451.97-303718.2 TYC - ESO - HD -

Symbiotic Catalogs

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

Position

Right ascension (°) 253.7165Ref Parallax (mas) 0.042±0.027Ref Reddening E(B-V) (mag) 0.28±0.01Ref, Note
Declination (°) -30.6217Ref Distance (kpc) 2.3Ref
11.02Ref, Note, 10.71Ref, Note
   
Galactic longitude (°) 352.3224Ref Proper motion in α (mas/yr) -3.03±0.03Ref    
Galactic latitude (°) 8.0890Ref Proper motion in δ (mas/yr) -0.27±0.02Ref    

Observations

X-Ray NoRef IR type SRef Radio YesRef
X-Ray type - J (mag) 8.99Ref Flickering Yes?Ref
GALEX FUV (mag) - H (mag) 8.14Ref Outbursts YesRef
GALEX NUV (mag) - K (mag) 7.74Ref Outburst type Z AndRef
IUE YesRef WISE W1 (mag) 7.51Ref Jets YesRef
FUSE NoRef WISE W2 (mag) 7.41Ref Resolved nebula -
U (mag) - WISE W3 (mag) 6.86Ref IPmax (eV) 54.9Ref
B (mag) 12.59Ref WISE W4 (mag) 6.25Ref [O III] lines YesRef
V (mag) 11.99Ref IRAS 12μm (Jy) - He II lines YesRef
R (mag) 12.24Ref IRAS 25μm (Jy) - [Fe VII] lines NoRef
I (mag) - IRAS 60μm (Jy) - O VI lines NoRef
BP (mag) 12.90Ref IRAS 100μm (Jy) -
G (mag) 11.98Ref AKARI S09 (Jy) -
RP (mag) 10.89Ref AKARI S18 (Jy) -

Orbit

Orbital period (days) 624.7±1.5Ref γ velocity (km/h) -35.87±0.35Ref Size of giant’s orbit (AU) 0.3937Ref
Eccentricity 0Ref RV of giant (km/h) 6.86±0.52Ref Separation (AU) -
Inclination (°) - Inferior conj. of giant (JD) 2452174.2 Mass function 0.0209Ref
Eclipses NoRef     Mass ratio -
Orbital ephemeris Min (pg) = 2427020±21 + 624.7±1.5 x ERef        

Cool component

Spectral type K5 IIIRef, M2 IIIRef,
M5 IIIRef
Mass (M) 1.5Ref Pulsation -
Eff. temperature (K) 3720Ref, 3400Ref Radius (R) 75-114Ref Type -
IR type SRef Luminosity (L) 755Ref Pulsation period (days) -
Metallicity [Fe/H] -0.29±0.13Ref     Pulsation ephemeris -

Hot component

Type/Spectral type - Mass (M) - Spin period (min) -
Shell-burning/Accreting-only shell-burningRef Radius (R) 0.035Ref Accretion disk -
Eff. temperature (K) 75000-90000Ref Luminosity (L) 280Ref, 100Ref    
Lower limit (K) -        
Upper limit (K) 98000Ref        

Links

SIMBAD   CDS Portal   ARAS Database


Notes

Swope (1941) noted the variability of the star (outbursts). The star was previously classified as a possible U Geminorum star and SS Cygni-like star. Subsequently, Elvey & Babcock (1943) reported a continuous spectrum with strong Balmer emission lines, He I, He II, and [O III] lines.


References


Last updated: January 12, 2024