New Online Database of Symbiotic Variables: Tol 26

Constellation
Hydra

Equatorial coordinates
α = 12 33 12.968
δ = -27 48 53.377

Galactic coordinates
l = 298.0195°
b = 34.8831°

Suspected	2013^Ref
Confirmed	-
Symbiotic IR type	D'?^Ref
Hot component type	-
Outbursts	-

Identifiers

Tol 26	IRAS -	GSC2.4.2 S6NC000107	AAVSO 000-BMJ-038
SIMBAD PN G298.0+34.8	Pan-STARRS 74621883040922535	SAO -	VSX 479136
GAIA DR3 3472245625888705664	SkyMapper 123312.98-274853.3	WRAY -	GCVS -
2MASS J12331298-2748534	HIP -	Hen -	BD -
WISE J123312.97-274853.4	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 (°)	188.3040^Ref	Parallax (mas)	0.087±0.108^Ref	Reddening E(B-V) (mag)	0.06±0.0^Ref ^{, Note}
Declination (°)	-27.8148^Ref	Distance (kpc)	5.55^Ref ^{, Note}, 4.96^Ref ^{, Note}
Galactic longitude (°)	298.0195^Ref	Proper motion in α (mas/yr)	-12.15±0.09^Ref
Galactic latitude (°)	34.8831^Ref	Proper motion in δ (mas/yr)	7.38±0.07^Ref

Observations

X-Ray	-	IR type	D'?^Ref	Radio	No^Ref
X-Ray type	-	J (mag)	13.90^Ref	Flickering	-
GALEX FUV (mag)	15.52^Ref	H (mag)	12.84^Ref	Outbursts	-
GALEX NUV (mag)	16.07^Ref	K (mag)	11.80^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	10.48^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	9.77^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.97^Ref	IPmax (eV)	-
B (mag)	17.00^Ref	WISE W4 (mag)	5.75^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)	16.48^Ref	IRAS 100μm (Jy)	-
G (mag)	16.29^Ref	AKARI S09 (Jy)	-
RP (mag)	15.95^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	-
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	-
IR type	D'?^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	-	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Noted for exhibiting some symbiotic characteristics in the HASH Database of PNe (Parker et al., 2016). The presence of a hot WD was confirmed by Werner et al. (2018). However, the existence of a cool companion remains unclear. Resembling EGB 6 (Bond et al., 2016).

References

Bond, H. E., Ciardullo, R., Esplin, T. L. et al., 2016, ApJ, 826, 2, 139, 2016ApJ...826..139B
Parker, Q. A., Bojičić, I. S., Frew, D. J., 2016, JPhCS, 728, 3, 032008, 2016JPhCS.728c2008P
Werner, K., Rauch, T., Kruk, J. W., 2018, A&A, 616, A73, 2018A&A...616A..73W

Tol 26