New Online Database of Symbiotic Variables: PN K4-22

Constellation
Aquila

Equatorial coordinates
α = 19 17 48.244
δ = +02 49 14.403

Galactic coordinates
l = 38.4628°
b = -4.5655°

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

Identifiers

PN K4-22	IRAS -	GSC2.4.2 N1N2350648	AAVSO -
SIMBAD PN K 4-22	Pan-STARRS 111382894509975314	SAO -	VSX 2206941
GAIA DR3 4292003631137786624	SkyMapper -	WRAY -	GCVS -
2MASS J19174824+0249144	HIP -	Hen -	BD -
WISE J191748.23+024914.2	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 (°)	289.4510^Ref	Parallax (mas)	0.083±0.051^Ref	Reddening E(B-V) (mag)	0.67±0.04^Ref ^{, Note}
Declination (°)	2.8207^Ref	Distance (kpc)	7.17^Ref ^{, Note}, 5.63^Ref ^{, Note}
Galactic longitude (°)	38.4628^Ref	Proper motion in α (mas/yr)	-4.74±0.06^Ref
Galactic latitude (°)	-4.5655^Ref	Proper motion in δ (mas/yr)	-9.15±0.05^Ref

Observations

X-Ray	-	IR type	S?^Ref	Radio	-
X-Ray type	-	J (mag)	9.23^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	7.99^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	7.63^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	7.48^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.53^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.30^Ref	IPmax (eV)	-
B (mag)	16.57^Ref	WISE W4 (mag)	7.04^Ref	[O III] lines	-
V (mag)	12.50^Ref	IRAS 12μm (Jy)	-	He II lines	-
R (mag)	14.17^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	-
BP (mag)	15.19^Ref	IRAS 100μm (Jy)	-
G (mag)	12.88^Ref	AKARI S09 (Jy)	0.10^Ref
RP (mag)	11.52^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	148.48±0.97^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	Yes?^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	SR^Ref
IR type	S?^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	62.03^Ref
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

Initially classified as a compact PN resembling a late-type star (class S) in Allen (1974), this class was suggested to be associated with symbiotics or VV Cep-type stars. Acker et al. (1987) identified it as a late-type star. Mowlavi et al. (2018) observed long-period variability.

References

Acker, A., Chopinet, M., Pottasch, S. R. et al., 1987, A&AS, 71, 163, 1987A&AS...71..163A
Allen, D. A., 1974, MNRAS, 168, 1, 1974MNRAS.168....1A
Mowlavi, N., Lecoeur-Taïbi, I., Lebzelter, T. et al., 2018, A&A, 618, A58, 2018A&A...618A..58M

PN K4-22