New Online Database of Symbiotic Variables: Bl 3-6

Constellation
Scorpius

Equatorial coordinates
α = 17 52 56.310
δ = -31 19 18.552

Galactic coordinates
l = 358.7669°
b = -2.5836°

Suspected	1984^Ref
Confirmed	1988^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

Bl 3-6	IRAS -	GSC2.4.2 S8DF045020	AAVSO 000-BJT-842
SIMBAD PN Bl 3-6	Pan-STARRS 70412682346574051	SAO -	VSX 241057
GAIA DR3 4055694259981267328	SkyMapper 175256.32-311918.5	WRAY -	GCVS -
2MASS J17525631-3119183	HIP -	Hen -	BD -
WISE J175256.35-311918.6	TYC -	ESO 456-4	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	Bl3-6 (Conf.)	Belzcyński et al. (2001)	Bl 3-6 (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	PN Bl 3-6 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	Bl-3.6 (Conf.)

Position

Right ascension (°)	268.2346^Ref	Parallax (mas)	0.097±0.036^Ref	Reddening E(B-V) (mag)	1.33±0.06^Ref ^{, Note}
Declination (°)	-31.3218^Ref	Distance (kpc)	4^Ref 6.18^Ref ^{, Note}, 5.22^Ref ^{, Note}
Galactic longitude (°)	358.7669^Ref	Proper motion in α (mas/yr)	-1.40±0.04^Ref
Galactic latitude (°)	-2.5836^Ref	Proper motion in δ (mas/yr)	-10.80±0.02^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	No^Ref
X-Ray type	-	J (mag)	10.03^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.87^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.38^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	8.02^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	8.09^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.94^Ref	IPmax (eV)	114^Ref
B (mag)	-	WISE W4 (mag)	8.51^Ref	[O III] lines	No^Ref
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	15.38^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	12.67^Ref	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	16.37^Ref	IRAS 100μm (Jy)	-
G (mag)	14.13^Ref	AKARI S09 (Jy)	-
RP (mag)	12.75^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	301±9^Ref	γ velocity (km/h)	-0.28±3.42^Ref	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	Min (I) = 2451902 + 301±9 x E^Ref

Cool component

Spectral type	M3^Ref	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	WD^Ref	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	600^Ref
Lower limit (K)	114000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Originally reported to show no emission lines by Allen (1979), this source was later confirmed as a symbiotic star, being included in the catalog of confirmed symbiotic stars by Allen (1984). Further studies by Stenholm & Acker (1987) and Acker et al. (1988) confirmed its symbiotic status and detected O VI lines.

References

Acker, A., Lundstrom, I., Stenholm, B., 1988, A&AS, 73, 325, 1988A&AS...73..325A
Allen, D. A., 1979, Obs, 99, 83, 1979Obs....99...83A
Allen, D. A., 1984, PASA, 5, 3, 369, 1984PASA....5..369A
Mikołajewska, J., Acker, A., Stenholm, B., 1997, A&A, 327, 191, 1997A&A...327..191M
Stenholm, B., Acker, A., 1987, A&AS, 68, 51, 1987A&AS...68...51S

Bl 3-6