New Online Database of Symbiotic Variables: K 6-6

Constellation
Ophiucus

Equatorial coordinates
α = 17 39 18.266
δ = -28 15 08.483

Galactic coordinates
l = 359.8511°
b = 1.5386°

Suspected	1997^Ref
Confirmed	1997^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

K 6-6	IRAS -	GSC2.4.2 S8DV010108	AAVSO -
SIMBAD WR 99	Pan-STARRS 74092648261117469	SAO -	VSX 61611
GAIA DR3 4060265200345451776	SkyMapper 173918.31-281508.4	WRAY -	GCVS -
2MASS J17391827-2815084	HIP -	Hen -	BD -
WISE J173918.27-281508.3	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	K 6-6 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	K 6-6 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	264.8261^Ref	Parallax (mas)	0.071±0.042^Ref	Reddening E(B-V) (mag)	1.13±0.04^Ref ^{, Note}
Declination (°)	-28.2524^Ref	Distance (kpc)	7.50^Ref ^{, Note}, 7.38^Ref ^{, Note}
Galactic longitude (°)	359.8511^Ref	Proper motion in α (mas/yr)	-3.92±0.05^Ref
Galactic latitude (°)	1.5386^Ref	Proper motion in δ (mas/yr)	-2.82±0.03^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	9.42^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.20^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	7.52^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	6.69^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	6.36^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	5.23^Ref	IPmax (eV)	114^Ref
B (mag)	16.00^Ref	WISE W4 (mag)	4.50^Ref	[O III] lines	Yes^Ref
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	15.92^Ref	IRAS 100μm (Jy)	-
G (mag)	14.42^Ref	AKARI S09 (Jy)	-
RP (mag)	13.06^Ref	AKARI S18 (Jy)	0.22^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	-
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	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	3000^Ref
Lower limit (K)	114000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Initially considered a WR candidate, the classification symbiotic classification was later confirmed based on the detection of the O VI lines, as reported in Mikołajewska et al. (1997).

References

Mikołajewska, J., Acker, A., Stenholm, B., 1997, A&A, 327, 191, 1997A&A...327..191M

K 6-6