IRAS 18120+4530

LIKELY MILKY WAY
 
Constellation
Hercules
Equatorial coordinates
α = 18 13 29.439
δ = +45 31 17.697
Galactic coordinates
l = 73.0531°
b = 25.3487°

Suspected 2008Ref
Confirmed -
Symbiotic IR type D?Ref
Hot component type shell-burning?Ref
Outbursts -

Identifiers

IRAS 18120+4530 IRAS 18120+4530 GSC2.4.2 N2DE032518 AAVSO -
SIMBAD IRAS 18120+4530 Pan-STARRS 162622733727076543 SAO - VSX 138005
GAIA DR3 2115418693478882048 SkyMapper - WRAY - GCVS -
2MASS J18132945+4531175 HIP - Hen - BD -
WISE J181329.44+453117.8 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 (°) 273.3727Ref Parallax (mas) 0.139±0.030Ref Reddening E(B-V) (mag) 0.03±0.0Ref, Note
Declination (°) 45.5216Ref Distance (kpc) 5.1Ref
5.98Ref, Note, 5.81Ref, Note
   
Galactic longitude (°) 73.0531Ref Proper motion in α (mas/yr) -8.77±0.03Ref    
Galactic latitude (°) 25.3487Ref Proper motion in δ (mas/yr) 4.06±0.04Ref    

Observations

X-Ray - IR type D?Ref Radio -
X-Ray type - J (mag) 10.52Ref Flickering -
GALEX FUV (mag) 21.75Ref H (mag) 8.49Ref Outbursts -
GALEX NUV (mag) 21.01Ref K (mag) 6.71Ref Outburst type -
IUE NoRef WISE W1 (mag) 4.52Ref Jets -
FUSE NoRef WISE W2 (mag) 3.31Ref Resolved nebula -
U (mag) - WISE W3 (mag) 2.03Ref IPmax (eV) 35.1Ref
B (mag) - WISE W4 (mag) 1.67Ref [O III] lines YesRef
V (mag) - IRAS 12μm (Jy) 7.86Ref He II lines NoRef
R (mag) - IRAS 25μm (Jy) 2.33Ref [Fe VII] lines NoRef
I (mag) - IRAS 60μm (Jy) 0.52Ref O VI lines NoRef
BP (mag) 14.53Ref IRAS 100μm (Jy) 1.00Ref
G (mag) 11.94Ref AKARI S09 (Jy) 6.14Ref
RP (mag) 10.53Ref AKARI S18 (Jy) 2.38Ref

Orbit

Orbital period (days) - γ velocity (km/h) -285.49±0.40Ref 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 C-NRef Mass (M) - Pulsation YesRef
Eff. temperature (K) - Radius (R) - Type MiraRef
IR type D?Ref Luminosity (L) 5500Ref Pulsation period (days) 392.23Ref
Metallicity [Fe/H] -     Pulsation ephemeris -

Hot component

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

Links

SIMBAD   CDS Portal


Notes

This star is identified as a carbon star and a Mira pulsator. It is considered a possible symbiotic candidate, as the spectrum reveals emission lines of hydrogen, helium, and [O III] (Mauron, 2008).


References


Last updated: December 1, 2021