New Online Database of Symbiotic Variables: K 4-38

Constellation
Vulpecula

Equatorial coordinates
α = 19 51 21.057
δ = +19 57 33.152

Galactic coordinates
l = 57.4722°
b = -3.4716°

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

Identifiers

K 4-38	IRAS -	GSC2.4.2 N1U7045715	AAVSO -
SIMBAD PN K 4-38	Pan-STARRS 131952978377601606	SAO -	VSX 2208694
GAIA DR3 1826283561040690816	SkyMapper -	WRAY -	GCVS -
2MASS J19512105+1957332	HIP -	Hen -	BD -
WISE J195121.07+195733.0	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 (°)	297.8377^Ref	Parallax (mas)	0.143±0.059^Ref	Reddening E(B-V) (mag)	0.67±0.01^Ref ^{, Note}
Declination (°)	19.9592^Ref	Distance (kpc)	5.43^Ref ^{, Note}, 8.90^Ref ^{, Note}
Galactic longitude (°)	57.4722^Ref	Proper motion in α (mas/yr)	-2.67±0.06^Ref
Galactic latitude (°)	-3.4716^Ref	Proper motion in δ (mas/yr)	-5.70±0.05^Ref

Observations

X-Ray	-	IR type	S?^Ref	Radio	-
X-Ray type	-	J (mag)	9.84^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.77^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.32^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	8.12^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	8.08^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	6.97^Ref	IPmax (eV)	-
B (mag)	-	WISE W4 (mag)	6.27^Ref	[O III] lines	-
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	-
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	-
BP (mag)	18.44^Ref	IRAS 100μm (Jy)	-
G (mag)	14.84^Ref	AKARI S09 (Jy)	-
RP (mag)	13.26^Ref	AKARI S18 (Jy)	-

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	SR?^Ref
IR type	S?^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	539.3923455^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

Classified as a symbiotic star candidate in the HASH Database of PNe (Parker et al., 2016), likely based on the study of Allen (1974). Additionally, it has been identified as a long-period variable (Mowlavi et al., 2018).

References

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
Parker, Q. A., Bojičić, I. S., Frew, D. J., 2016, JPhCS, 728, 3, 032008, 2016JPhCS.728c2008P

K 4-38