EF Aql

CONFIRMED MILKY WAY

Constellation
Aquila

Equatorial coordinates
α = 19 51 51.720
δ = -05 48 16.715

Galactic coordinates
l = 34.6144°
b = -16.0731°

Suspected	2016^Ref
Confirmed	2016^Ref
Symbiotic IR type	D^Ref
Hot component type	accreting-only^Ref
Outbursts	-

Identifiers

EF Aql	IRAS 19491-0556	GSC2.4.2 S9YO000483	AAVSO 000-BCT-657
SIMBAD V* EF Aql	Pan-STARRS 101032979654155060	SAO -	VSX 1289
GAIA DR3 4197231849149999872	SkyMapper 195151.71-054816.5	WRAY -	GCVS EF Aql
2MASS J19515172-0548166	HIP -	Hen -	BD -
WISE J195151.72-054816.6	TYC -	ESO -	HD -

Symbiotic Catalogs

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

Position

Right ascension (°)	297.9655^Ref	Parallax (mas)	0.079±0.072^Ref	Reddening E(B-V) (mag)	0.14±0.0^Ref ^{, Note}
Declination (°)	-5.8046^Ref	Distance (kpc)	3.1^Ref 8.03^Ref ^{, Note}, 3.78^Ref ^{, Note}
Galactic longitude (°)	34.6144^Ref	Proper motion in α (mas/yr)	1.09±0.08^Ref
Galactic latitude (°)	-16.0731^Ref	Proper motion in δ (mas/yr)	0.44±0.05^Ref

Observations

X-Ray	-	IR type	D^Ref	Radio	No^Ref
X-Ray type	-	J (mag)	6.95^Ref	Flickering	Yes^Ref
GALEX FUV (mag)	16.91^Ref	H (mag)	6.00^Ref	Outbursts	-
GALEX NUV (mag)	16.31^Ref	K (mag)	5.36^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	4.71^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	3.82^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	2.49^Ref	IPmax (eV)	35.1^Ref
B (mag)	15.46^Ref	WISE W4 (mag)	1.47^Ref	[O III] lines	Yes^Ref
V (mag)	15.11^Ref	IRAS 12μm (Jy)	4.93^Ref	He II lines	No^Ref
R (mag)	-	IRAS 25μm (Jy)	2.58^Ref	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	0.42^Ref	O VI lines	No^Ref
BP (mag)	14.55^Ref	IRAS 100μm (Jy)	1.00^Ref
G (mag)	12.33^Ref	AKARI S09 (Jy)	2.22^Ref
RP (mag)	10.67^Ref	AKARI S18 (Jy)	2.28^Ref

Orbit

Orbital period (days)	-	γ velocity (km/h)	-	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	M^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	Mira^Ref
IR type	D^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	329.4^Ref, 320.4±0.3^Ref
Metallicity [Fe/H]	-			Pulsation ephemeris	Max(V) = 2458127.3±1.6 + 320.4±0.3 x E^Ref

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_⊙)	5.3^Ref
Lower limit (K)	-
Upper limit (K)	55000^Ref

Links

SIMBAD CDS Portal ARAS Database

Notes

References

Margon, B., Prochaska, J. X., Tejos, N. et al., 2016, PASP, 128, 960, 024201, 2016PASP..128b4201M
Richwine, P., Bedient, J., Slater, T. et al., 2005, JAVSO, 34, 1, 28, 2005JAVSO..34...28R
Stoyanov, K. A., Iłkiewicz, K., Luna, G. J. M. et al., 2020, MNRAS, 495, 1, 1461, 2020MNRAS.495.1461S
Zamanov, R. K., Boeva, S., Nikolov, Y. M. et al., 2017, AN, 338, 6, 680, 2017AN....338..680Z

Last updated: August 8, 2021