Hen 2-376

CONFIRMED MILKY WAY

Constellation
Sagittarius

Equatorial coordinates
α = 18 15 46.301
δ = -27 53 46.260

Galactic coordinates
l = 4.1893°
b = -5.2457°

Suspected	1988^Ref
Confirmed	1994^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

Hen 2-376	IRAS -	GSC2.4.2 S9TP022990	AAVSO 000-BLV-726
SIMBAD EM* AS 294	Pan-STARRS 74522739429184923	SAO -	VSX 49059
GAIA DR3 4052199462289740416	SkyMapper -	WRAY 16-396	GCVS -
2MASS J18154630-2753462	HIP -	Hen 2-376	BD -
WISE J181546.30-275346.2	TYC -	ESO 457-1	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	Hen 2-376 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	Hen 2-376 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	NSV 10435 (Conf.)

Position

Right ascension (°)	273.9429^Ref	Parallax (mas)	0.128±0.029^Ref	Reddening E(B-V) (mag)	0.32±0.02^Ref ^{, Note}
Declination (°)	-27.8962^Ref	Distance (kpc)	4^Ref 6.55^Ref ^{, Note}, 5.82^Ref ^{, Note}
Galactic longitude (°)	4.1893^Ref	Proper motion in α (mas/yr)	-6.58±0.03^Ref
Galactic latitude (°)	-5.2457^Ref	Proper motion in δ (mas/yr)	-3.26±0.03^Ref

Observations

X-Ray	-	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	9.41^Ref	Flickering	No^Ref
GALEX FUV (mag)	-	H (mag)	8.42^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.10^Ref	Outburst type	-
IUE	Yes^Ref	WISE W1 (mag)	7.83^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	8.01^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.63^Ref	IPmax (eV)	54.4^Ref, 35.1^Ref
B (mag)	-	WISE W4 (mag)	7.25^Ref	[O III] lines	Yes^Ref
V (mag)	14.40^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)	14.29^Ref	IRAS 100μm (Jy)	-
G (mag)	12.99^Ref	AKARI S09 (Jy)	-
RP (mag)	11.77^Ref	AKARI S18 (Jy)	-

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	M2^Ref	Mass (M_⊙)	-	Pulsation	-
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_⊙)	200^Ref
Lower limit (K)	35000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Suspected by Acker et al. (1988), this star was later reported to exhibit He II lines by Cieslinski et al. (1994). However, these lines were not detected in the observations reported by Mikołajewska et al. (1997). In Lutz et al. (2010), some variability was observed using MACHO.

References

Acker, A., Lundstrom, I., Stenholm, B., 1988, A&AS, 73, 325, 1988A&AS...73..325A
Cieslinski, D., Elizalde, F., Steiner, J. E., 1994, A&AS, 106, 243, 1994A&AS..106..243C
Lutz, J. H., Fraser, O., McKeever, J. et al., 2010, PASP, 122, 891, 524, 2010PASP..122..524L
Mikołajewska, J., Acker, A., Stenholm, B., 1997, A&A, 327, 191, 1997A&A...327..191M

Last updated: April 14, 2022