K 4-31

SUSPECTED MILKY WAY

Constellation
Aquila

Equatorial coordinates
α = 19 37 04.687
δ = +13 41 12.705

Galactic coordinates
l = 50.3191°
b = -3.6220°

Suspected	2016^Ref
Confirmed	-
Symbiotic IR type	D?^Ref
Hot component type	-
Outbursts	-

Identifiers

K 4-31	IRAS 19347+1334	GSC2.4.2 N277012814	AAVSO 000-BDF-370
SIMBAD V* V998 Aql	Pan-STARRS 124422942695484740	SAO -	VSX 2137
GAIA DR3 4317863427412144896	SkyMapper -	WRAY -	GCVS V0998 Aql
2MASS J19370469+1341127	HIP -	Hen -	BD -
WISE J193704.68+134112.6	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 (°)	294.2695^Ref	Parallax (mas)	0.055±0.080^Ref	Reddening E(B-V) (mag)	0.63±0.02^Ref ^{, Note}
Declination (°)	13.6869^Ref	Distance (kpc)	6.06^Ref ^{, Note}, 4.88^Ref ^{, Note}
Galactic longitude (°)	50.3191^Ref	Proper motion in α (mas/yr)	-2.22±0.07^Ref
Galactic latitude (°)	-3.6220^Ref	Proper motion in δ (mas/yr)	-6.79±0.06^Ref

Observations

X-Ray	-	IR type	D?^Ref	Radio	-
X-Ray type	-	J (mag)	8.88^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	7.90^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	7.25^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	6.27^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	5.72^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	4.72^Ref	IPmax (eV)	-
B (mag)	-	WISE W4 (mag)	3.98^Ref	[O III] lines	-
V (mag)	-	IRAS 12μm (Jy)	0.36^Ref	He II lines	-
R (mag)	-	IRAS 25μm (Jy)	0.25^Ref	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	0.45^Ref	O VI lines	-
BP (mag)	18.41^Ref	IRAS 100μm (Jy)	23.30^Ref
G (mag)	14.11^Ref	AKARI S09 (Jy)	0.45^Ref
RP (mag)	12.36^Ref	AKARI S18 (Jy)	0.28^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	M^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	Mira^Ref
IR type	D?^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	310^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

Listed as a symbiotic star candidate in the HASH Database of PNe (Parker et al., 2016), possibly based on the work of Allen (1974). Additionally, suggested as a Mira variable (Samus´ et al., 2017) and as a long-period variable in 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
Samus´, N. N., Kazarovets, E. V., Durlevich, O. V. et al., 2017, ARep, 61, 1, 80, 2017ARep...61...80S

Last updated: March 25, 2022