Hen 2-294

CONFIRMED MILKY WAY

Constellation
Scorpius

Equatorial coordinates
α = 17 51 45.720
δ = -32 54 51.908

Galactic coordinates
l = 357.2663°
b = -3.1772°

Suspected	1979^Ref
Confirmed	1984^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

Hen 2-294	IRAS -	GSC2.4.2 S8GZ021505	AAVSO 000-BJT-841
SIMBAD WRAY 16-318	Pan-STARRS -	SAO -	VSX 241055
GAIA DR3 4043421575564556160	SkyMapper -	WRAY 16-318	GCVS -
2MASS J17514572-3254515	HIP -	Hen 2-294	BD -
WISE J175145.58-325455.4	TYC -	ESO 394-1	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	He2-294 (Conf.)	Belzcyński et al. (2001)	Hen 2-294 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	He2-294 (Conf.)	Akras et al. (2019)	Hen 2-294 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	M-125 (Conf.)

Position

Right ascension (°)	267.9405^Ref	Parallax (mas)	0.085±0.027^Ref	Reddening E(B-V) (mag)	1.04±0.03^Ref ^{, Note}
Declination (°)	-32.9144^Ref	Distance (kpc)	5.5^Ref 7.05^Ref ^{, Note}, 6.35^Ref ^{, Note}
Galactic longitude (°)	357.2663^Ref	Proper motion in α (mas/yr)	-2.70±0.03^Ref
Galactic latitude (°)	-3.1772^Ref	Proper motion in δ (mas/yr)	-11.25±0.02^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	No^Ref
X-Ray type	-	J (mag)	10.07^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.88^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.49^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	7.08^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.24^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.18^Ref	IPmax (eV)	114^Ref
B (mag)	-	WISE W4 (mag)	6.83^Ref	[O III] lines	No^Ref
V (mag)	15.90^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	15.18^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	12.35^Ref	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	15.75^Ref	IRAS 100μm (Jy)	-
G (mag)	13.88^Ref	AKARI S09 (Jy)	-
RP (mag)	12.56^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	393±15^Ref	γ velocity (km/h)	0.67±4.77^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	Min (I) = 2451961 + 393±15 x E^Ref

Cool component

Spectral type	M3 III^Ref, M3 III^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	49±1^Ref
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_⊙)	430^Ref
Lower limit (K)	114000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

References

Allen, D. A., 1979, Obs, 99, 83, 1979Obs....99...83A
Allen, D. A., 1980, MNRAS, 192, 521, 1980MNRAS.192..521A
Allen, D. A., 1984, PASA, 5, 3, 369, 1984PASA....5..369A
Gromadzki, M., Mikołajewska, J., Soszyński, I., 2013, AcA, 63, 4, 405, 2013AcA....63..405G
Mikołajewska, J., Acker, A., Stenholm, B., 1997, A&A, 327, 191, 1997A&A...327..191M

Last updated: April 18, 2022