Hen 2-57

SUSPECTED MILKY WAY

Constellation
Carina

Equatorial coordinates
α = 10 56 02.972
δ = -61 28 07.366

Galactic coordinates
l = 289.6030°
b = -1.6196°

Suspected	1994^Ref
Confirmed	-
Symbiotic IR type	D?^Ref
Hot component type	-
Outbursts	-

Identifiers

Hen 2-57	IRAS 10541-6113	GSC2.4.2 S4A1193682	AAVSO -
SIMBAD Hen 2-57	Pan-STARRS -	SAO -	VSX -
GAIA DR3 5241901177019316224	SkyMapper 105603.01-612807.3	WRAY -	GCVS -
2MASS J10560299-6128074	HIP -	Hen 2-57	BD -
WISE J105602.98-612807.3	TYC -	ESO 128-20	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	Hen 2-57 (Susp.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	164.0124^Ref	Parallax (mas)	-0.230±0.126^Ref	Reddening E(B-V) (mag)	2.05±0.72^Ref ^{, Note}
Declination (°)	-61.4687^Ref	Distance (kpc)	8.63^Ref ^{, Note}, 6.98^Ref ^{, Note}
Galactic longitude (°)	289.6030^Ref	Proper motion in α (mas/yr)	-6.69±0.13^Ref
Galactic latitude (°)	-1.6196^Ref	Proper motion in δ (mas/yr)	2.49±0.13^Ref

Observations

X-Ray	-	IR type	D?^Ref	Radio	-
X-Ray type	-	J (mag)	15.39^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	13.52^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	11.51^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	8.96^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.52^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	4.39^Ref	IPmax (eV)	35.1^Ref
B (mag)	-	WISE W4 (mag)	2.27^Ref	[O III] lines	Yes^Ref
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	No^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	17.83^Ref	IRAS 100μm (Jy)	-
G (mag)	18.00^Ref	AKARI S09 (Jy)	0.47^Ref
RP (mag)	16.75^Ref	AKARI S18 (Jy)	0.86^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	-	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	-
IR type	D?^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

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

Links

SIMBAD CDS Portal

Notes

Kingsburgh & Barlow (1994) suggested that the object could be a planetary nebula with a symbiotic star due to the high density of its core.

References

Kingsburgh, R. L., Barlow, M. J., 1994, MNRAS, 271, 257, 1994MNRAS.271..257K

Last updated: June 1, 2021