M 1-77

Constellation
Cygnus

Equatorial coordinates
α = 21 19 07.366
δ = +46 18 47.120

Galactic coordinates
l = 89.3840°
b = -2.2664°

Suspected	2005^Ref
Re-classified	2016^Ref
Type	compact low-excitation young PN^Ref

Identifiers

M 1-77	IRAS 21173+4606	GSC2.4.2 N31W000725	AAVSO -
SIMBAD PN M 1-77	Pan-STARRS 163573197806696370	SAO -	VSX 63986
GAIA DR3 1971995510535755648	SkyMapper -	WRAY -	GCVS -
2MASS J21190736+4618471	HIP -	Hen -	BD -
WISE J211907.36+461847.2	TYC 3589-1304-1	ESO -	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 (°)	319.7807^Ref	Parallax (mas)	0.344±0.010^Ref	Reddening E(B-V) (mag)	1.54±0.03^Ref ^{, Note}
Declination (°)	46.3131^Ref	Distance (kpc)	2.64^Ref ^{, Note}, 2.66^Ref ^{, Note}
Galactic longitude (°)	89.3840^Ref	Proper motion in α (mas/yr)	-1.59±0.01^Ref
Galactic latitude (°)	-2.2664^Ref	Proper motion in δ (mas/yr)	-2.53±0.01^Ref

Links

SIMBAD CDS Portal

Notes

Mentioned as a possible planetary nebula around a symbiotic star in Kondratyeva (2005) based on the detection of TiO bands in the spectrum. Previous observations in Sabbadin et al. (1983) showed a blue continuum and a low-excitation emission spectrum ([O II], [N II], [S II], Balmer lines of hydrogen). The object is also classified as a compact young planetary nebula in the HASH Database of PNe (Parker et al., 2016).

References

Kondratyeva, L. N., 2005, A&AT, 24, 4, 291, 2005A&AT...24..291K
Parker, Q. A., Bojičić, I. S., Frew, D. J., 2016, JPhCS, 728, 3, 032008, 2016JPhCS.728c2008P
Sabbadin, F., Ortolani, S., Bianchini, A. et al., 1983, A&A, 123, 147, 1983A&A...123..147S