PN H1-18

Constellation
Ophiucus

Equatorial coordinates
α = 17 29 42.760
δ = -29 32 50.300

Galactic coordinates
l = 357.6246°
b = 2.6028°

Suspected	1974^Ref
Re-classified	1992^Ref
Type	PN^Ref

Identifiers

PN H1-18	IRAS 17265-2930	GSC2.4.2 S8HG042169	AAVSO -
SIMBAD PN H 1-18	Pan-STARRS 72542624281483488	SAO -	VSX -
GAIA DR3 -	SkyMapper 172942.74-293250.3	WRAY -	GCVS -
2MASS J17294276-2932503	HIP -	Hen 2-234	BD -
WISE J172942.80-293250.3	TYC -	ESO 455-3	HD -

Symbiotic Catalogs

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

Position

Right ascension (°)	262.4282^Ref	Parallax (mas)	-	Reddening E(B-V) (mag)	1.38±0.06^Ref ^{, Note}
Declination (°)	-29.5473^Ref	Distance (kpc)	-^{, Note}
Galactic longitude (°)	357.6246^Ref	Proper motion in α (mas/yr)	-
Galactic latitude (°)	2.6028^Ref	Proper motion in δ (mas/yr)	-

Links

SIMBAD CDS Portal

Notes

Allen & Glass (1974) suggested, based on infrared photometry, that this southern PN exhibits a continuum similar to symbiotic and VV Cephei stars. It is mentioned as a true PN in Acker et al. (1992).

References

Acker, A., Marcout, J., Ochsenbein, F. et al., 1992, The Strasbourg-ESO Catalogue of Galactic Planetary Nebulae. Parts I, 1, 1992secg.book.....A
Allen, D. A., Glass, I. S., 1974, MNRAS, 167, 337, 1974MNRAS.167..337A