StHA 154

CONFIRMED MILKY WAY

Constellation
Hercules

Equatorial coordinates
α = 18 43 27.934
δ = +19 30 05.344

Galactic coordinates
l = 49.6054°
b = 10.4512°

Suspected	2002^Ref
Confirmed	2002^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

StHA 154	IRAS 18412+1926	GSC2.4.2 N296193453	AAVSO 000-BPK-806
SIMBAD 2MASS J18432793+1930053	Pan-STARRS 131402808663002201	SAO -	VSX 414275
GAIA DR3 4524631364975219712	SkyMapper -	WRAY -	GCVS -
2MASS J18432793+1930053	HIP -	Hen -	BD -
WISE J184327.92+193005.3	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	StHA 154 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	280.8664^Ref	Parallax (mas)	0.533±0.045^Ref	Reddening E(B-V) (mag)	0.23±0.0^Ref ^{, Note}
Declination (°)	19.5015^Ref	Distance (kpc)	1.69^Ref ^{, Note}, 1.55^Ref ^{, Note}
Galactic longitude (°)	49.6054^Ref	Proper motion in α (mas/yr)	3.55±0.04^Ref
Galactic latitude (°)	10.4512^Ref	Proper motion in δ (mas/yr)	-7.24±0.05^Ref

Observations

X-Ray	-	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	5.80^Ref	Flickering	No^Ref
GALEX FUV (mag)	-	H (mag)	4.83^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	4.42^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	4.36^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	4.20^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	3.95^Ref	IPmax (eV)	114^Ref
B (mag)	-	WISE W4 (mag)	3.49^Ref	[O III] lines	Yes^Ref
V (mag)	13.50^Ref	IRAS 12μm (Jy)	1.08^Ref	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	0.34^Ref	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	0.40^Ref	O VI lines	Yes^Ref
BP (mag)	13.16^Ref	IRAS 100μm (Jy)	1.38^Ref
G (mag)	10.18^Ref	AKARI S09 (Jy)	1.30^Ref
RP (mag)	8.69^Ref	AKARI S18 (Jy)	0.48^Ref

Orbit

Orbital period (days)	-	γ velocity (km/h)	-0.99±0.36^Ref	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	M2^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	68.72^Ref
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 ARAS Database

Notes

Classified as a symbiotic binary in Munari & Zwitter (2002), the spectrum of this object displays O VI lines.

References

Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M
Munari, U., Zwitter, T., 2002, A&A, 383, 188, 2002A&A...383..188M

Last updated: January 13, 2024