New Online Database of Symbiotic Variables: PN K4-54

Constellation
Cygnus

Equatorial coordinates
α = 20 42 53.279
δ = +45 56 31.041

Galactic coordinates
l = 84.9635°
b = 2.2035°

Suspected	1974^Ref
Confirmed	-
Symbiotic IR type	S?^Ref
Hot component type	-
Outbursts	-

Identifiers

PN K4-54	IRAS -	GSC2.4.2 N323024594	AAVSO -
SIMBAD PN K 4-54	Pan-STARRS 163133107220041009	SAO -	VSX -
GAIA DR3 2070455406720136960	SkyMapper -	WRAY -	GCVS -
2MASS J20425328+4556311	HIP -	Hen -	BD -
WISE J204253.29+455631.1	TYC -	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 (°)	310.7220^Ref	Parallax (mas)	0.129±0.036^Ref	Reddening E(B-V) (mag)	2.48±0.07^Ref ^{, Note}
Declination (°)	45.9420^Ref	Distance (kpc)	5.10^Ref ^{, Note}, 4.63^Ref ^{, Note}
Galactic longitude (°)	84.9635^Ref	Proper motion in α (mas/yr)	-3.18±0.04^Ref
Galactic latitude (°)	2.2035^Ref	Proper motion in δ (mas/yr)	-5.02±0.04^Ref

Observations

X-Ray	-	IR type	S?^Ref	Radio	-
X-Ray type	-	J (mag)	9.55^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.09^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	7.50^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	7.13^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.27^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.05^Ref	IPmax (eV)	-
B (mag)	-	WISE W4 (mag)	7.04^Ref	[O III] lines	-
V (mag)	15.24^Ref	IRAS 12μm (Jy)	-	He II lines	-
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	-
BP (mag)	17.90^Ref	IRAS 100μm (Jy)	-
G (mag)	14.39^Ref	AKARI S09 (Jy)	0.11^Ref
RP (mag)	12.87^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	-99.60±0.96^Ref	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	S?^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

Classified as a compact PN resembling a late-type star (class S) by Allen (1974), who also suggested that most objects in this class are symbiotics or VV Cep-type stars. Subsequent observations in Acker & Stenholm (1990) identified the object as an M-type star.

References

Acker, A., Stenholm, B., 1990, A&AS, 86, 219, 1990A&AS...86..219A
Allen, D. A., 1974, MNRAS, 168, 1, 1974MNRAS.168....1A

PN K4-54