Hen 2-379

Constellation
Sagittarius

Equatorial coordinates
α = 18 16 17.336
δ = -27 04 33.000

Galactic coordinates
l = 4.9705°
b = -4.9617°

Suspected	2000^Ref
Re-classified	2013^Ref
Type	PN^Ref

Identifiers

Hen 2-379	IRAS 18131-2705	GSC2.4.2 S9TR228551	AAVSO 000-BJT-867
SIMBAD PN M 1-44	Pan-STARRS 75502740723078866	SAO -	VSX 241107
GAIA DR3 4052553745477004928	SkyMapper -	WRAY 16-399	GCVS -
2MASS -	HIP -	Hen 2-379	BD -
WISE J181617.34-270433.0	TYC -	ESO 522-11	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	Hen 2-379 (Susp.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	Hen 2-379 (Susp.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	274.0722^Ref	Parallax (mas)	0.125±0.252^Ref	Reddening E(B-V) (mag)	0.4±0.03^Ref ^{, Note}
Declination (°)	-27.0758^Ref	Distance (kpc)	5.92^Ref ^{, Note} -^{, Note}
Galactic longitude (°)	4.9705^Ref	Proper motion in α (mas/yr)	2.39±0.56^Ref
Galactic latitude (°)	-4.9617^Ref	Proper motion in δ (mas/yr)	-1.36±0.48^Ref

Links

SIMBAD CDS Portal

Notes

Initially suspected based on the spectrum revealing a cool giant of G-K spectral type and emission lines with ionization potential up to 35.1 eV (Belczyński et al., 2000). However, the physical association between the giant and the nebula, the source of emission lines, was questioned by the same study (Belczyński et al., 2000). The superposition was subsequently confirmed by Miszalski et al. (2013), leading to the reclassification of the object as a PN. This reclassification is not reflected in the catalog of Akras et al. (2019).

References

Akras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L. et al., 2019, ApJS, 240, 2, 21, 2019ApJS..240...21A
Belczyński, K., Mikołajewska, J., Munari, U. et al., 2000, A&AS, 146, 407, 2000A&AS..146..407B
Miszalski, B., Mikołajewska, J., Udalski, A., 2013, MNRAS, 432, 4, 3186, 2013MNRAS.432.3186M