V2204 Oph

CONFIRMED MILKY WAY

Constellation
Ophiucus

Equatorial coordinates
α = 18 26 01.923
δ = +11 55 09.527

Galactic coordinates
l = 40.8042°
b = 10.9826°

Suspected	1983^Ref
Confirmed	2021^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	Yes^Ref - Z And?^Ref

Identifiers

V2204 Oph	IRAS -	GSC2.4.2 N1PK055768	AAVSO 000-BCW-553
SIMBAD V* V2204 Oph	Pan-STARRS 122302765079963685	SAO -	VSX 22690
GAIA DR3 4484231047157223296	SkyMapper -	WRAY -	GCVS V2204 Oph
2MASS J18260192+1155095	HIP -	Hen -	BD -
WISE J182601.92+115509.6	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)	V2204 Oph (Conf.)

Position

Right ascension (°)	276.5080^Ref	Parallax (mas)	0.040±0.018^Ref	Reddening E(B-V) (mag)	0.16±0.0^Ref ^{, Note}
Declination (°)	11.9193^Ref	Distance (kpc)	11.62^Ref ^{, Note}, 9.60^Ref ^{, Note}
Galactic longitude (°)	40.8042^Ref	Proper motion in α (mas/yr)	-1.74±0.02^Ref
Galactic latitude (°)	10.9826^Ref	Proper motion in δ (mas/yr)	-3.74±0.02^Ref

Observations

X-Ray	-	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	11.16^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	10.32^Ref	Outbursts	Yes^Ref
GALEX NUV (mag)	-	K (mag)	10.10^Ref	Outburst type	Z And?^Ref
IUE	No^Ref	WISE W1 (mag)	9.97^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	9.99^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	9.72^Ref	IPmax (eV)	54.4^Ref
B (mag)	15.97^Ref	WISE W4 (mag)	8.86^Ref	[O III] lines	No^Ref
V (mag)	14.37^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	14.56^Ref	IRAS 100μm (Jy)	-
G (mag)	13.61^Ref	AKARI S09 (Jy)	-
RP (mag)	12.64^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	450?^Ref	γ velocity (km/h)	-431.92±2.08^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	K3^Ref	Mass (M_⊙)	-	Pulsation	Yes?^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	-
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

Type/Spectral type	WD^Ref	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	54000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal ARAS Database

Notes

Observed during at least two brightenings by Ross (1926) and Samus´ (1983), this object has been confirmed as a symbiotic binary by Merc et al. (2021).

References

Merc, J., Gális, R., Wolf, M. et al., 2021, MNRAS, 506, 3, 4151, 2021MNRAS.506.4151M
Ross, F. E., 1926, AJ, 36, 122, 1926AJ.....36..122R
Samus´, N. N., 1983, MitVS, 9, 87, 1983MitVS...9...87S

Last updated: August 21, 2021