New Online Database of Symbiotic Variables: PN K3-28

Constellation
Aquila

Equatorial coordinates
α = 19 15 21.470
δ = +02 33 01.962

Galactic coordinates
l = 37.9397°
b = -4.1482°

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

Identifiers

PN K3-28	IRAS 19128+0227	GSC2.4.2 N1N2064130	AAVSO -
SIMBAD IRAS 19128+0227	Pan-STARRS 111062888395141060	SAO -	VSX -
GAIA DR3 4267975870439966208	SkyMapper -	WRAY -	GCVS -
2MASS J19152147+0233020	HIP -	Hen -	BD -
WISE J191521.46+023301.9	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 (°)	288.8395^Ref	Parallax (mas)	0.082±0.106^Ref	Reddening E(B-V) (mag)	0.8±0.03^Ref ^{, Note}
Declination (°)	2.5505^Ref	Distance (kpc)	7.15^Ref ^{, Note}, 2.23^Ref ^{, Note}
Galactic longitude (°)	37.9397^Ref	Proper motion in α (mas/yr)	-3.55±0.10^Ref
Galactic latitude (°)	-4.1482^Ref	Proper motion in δ (mas/yr)	-7.68±0.09^Ref

Observations

X-Ray	-	IR type	D?^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	6.29^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	5.24^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	4.55^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	4.25^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	3.36^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	1.47^Ref	IPmax (eV)	-
B (mag)	16.98^Ref	WISE W4 (mag)	0.53^Ref	[O III] lines	-
V (mag)	11.22^Ref	IRAS 12μm (Jy)	6.75^Ref	He II lines	-
R (mag)	15.63^Ref	IRAS 25μm (Jy)	3.99^Ref	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	0.82^Ref	O VI lines	-
BP (mag)	17.52^Ref	IRAS 100μm (Jy)	21.20^Ref
G (mag)	12.49^Ref	AKARI S09 (Jy)	7.96^Ref
RP (mag)	11.22^Ref	AKARI S18 (Jy)	5.53^Ref

Orbit

Orbital period (days)	-	γ velocity (km/h)	-	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	Mira^Ref
IR type	D?^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	331^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 compactPN resembling a late-type star (class S) in Allen (1974), this object was suggested to be associated with symbiotics or VV Cep-type stars. Acker et al. (1987) identified it as a late-type star. Heinze et al. (2018) suggested the presence of a Mira 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
Heinze, A. N., Tonry, J. L., Denneau, L. et al., 2018, AJ, 156, 5, 241, 2018AJ....156..241H

PN K3-28