New Online Database of Symbiotic Variables: ER Oph

Constellation
Ophiucus

Equatorial coordinates
α = 17 00 42.128
δ = -26 10 12.688

Galactic coordinates
l = 356.6858°
b = 9.7872°

Suspected	2018^Ref
Confirmed	-
Symbiotic IR type	S?^Ref
Hot component type	accreting-only?^Ref
Outbursts	-

Identifiers

ER Oph	IRAS -	GSC2.4.2 S8FH051578	AAVSO 000-BDW-665
SIMBAD V* ER Oph	Pan-STARRS 76592551754896240	SAO -	VSX 20647
GAIA DR3 4112095903599868288	SkyMapper 170042.13-261012.6	WRAY -	GCVS ER Oph
2MASS J17004213-2610124	HIP -	Hen -	BD -
WISE J170042.13-261012.6	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)	-

Position

Right ascension (°)	255.1755^Ref	Parallax (mas)	0.341±0.051^Ref	Reddening E(B-V) (mag)	0.25±0.01^Ref ^{, Note}
Declination (°)	-26.1702^Ref	Distance (kpc)	2.96^Ref ^{, Note}, 3.66^Ref ^{, Note}
Galactic longitude (°)	356.6858^Ref	Proper motion in α (mas/yr)	-4.85±0.07^Ref
Galactic latitude (°)	9.7872^Ref	Proper motion in δ (mas/yr)	-5.78±0.05^Ref

Observations

X-Ray	-	IR type	S?^Ref	Radio	-
X-Ray type	-	J (mag)	8.49^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	7.67^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	7.25^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	6.85^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	6.44^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	5.61^Ref	IPmax (eV)	-
B (mag)	16.43^Ref	WISE W4 (mag)	4.78^Ref	[O III] lines	-
V (mag)	11.80^Ref	IRAS 12μm (Jy)	-	He II lines	-
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	-
BP (mag)	15.47^Ref	IRAS 100μm (Jy)	-
G (mag)	12.67^Ref	AKARI S09 (Jy)	0.28^Ref
RP (mag)	11.06^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	-130.64±1.47^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	-	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	Mira^Ref
IR type	S?^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	208.76±1.83^Ref
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

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

Links

SIMBAD CDS Portal

Notes

Symbiotic candidate selected for AAVSO observing campaing (AAVSO Alert Notice 650) by Adrian B. Lucy (Columbia University). Classified as a Mira variable by Pojmanski (2002).

References

Pojmanski, G., 2002, AcA, 52, 397, 2002AcA....52..397P
Vogt, N., Contreras-Quijada, A., Fuentes-Morales, I. et al., 2016, ApJS, 227, 1, 6, 2016ApJS..227....6V

ER Oph