New Online Database of Symbiotic Variables: Al 2-B

LIKELY MILKY WAY

Constellation
Ophiucus

Equatorial coordinates
α = 17 27 47.124
δ = -28 11 03.469

Galactic coordinates
l = 358.5298°
b = 3.7068°

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

Identifiers

Al 2-B	IRAS -	GSC2.4.2 S8G8170840	AAVSO -
SIMBAD PN Al 2-B	Pan-STARRS 74172619463669154	SAO -	VSX 305996
GAIA DR3 4059890541762526080	SkyMapper 172747.12-281103.0	WRAY -	GCVS -
2MASS J17274713-2811033	HIP -	Hen -	BD -
WISE J172747.11-281102.9	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	Al 2-B (Susp.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	261.9463^Ref	Parallax (mas)	-0.117±0.274^Ref	Reddening E(B-V) (mag)	1.07±0.02^Ref ^{, Note}
Declination (°)	-28.1843^Ref	Distance (kpc)	7.38^Ref ^{, Note}, 6.39^Ref ^{, Note}
Galactic longitude (°)	358.5298^Ref	Proper motion in α (mas/yr)	-4.84±0.29^Ref
Galactic latitude (°)	3.7068^Ref	Proper motion in δ (mas/yr)	-4.60±0.19^Ref

Observations

X-Ray	-	IR type	D?^Ref	Radio	No^Ref
X-Ray type	-	J (mag)	14.11^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	13.11^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	13.21^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	10.88^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	10.14^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	6.77^Ref	IPmax (eV)	54.4^Ref
B (mag)	-	WISE W4 (mag)	4.58^Ref	[O III] lines	Yes^Ref
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	18.71^Ref	IRAS 100μm (Jy)	-
G (mag)	18.51^Ref	AKARI S09 (Jy)	-
RP (mag)	17.42^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	shell-burning?^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	41000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

The potential D-type classification is primarily derived from the emission-line spectrum (Miszalski et al., 2013). The object appears relatively faint in the 2MASS dataset.

References

Miszalski, B., Mikołajewska, J., Udalski, A., 2013, MNRAS, 432, 4, 3186, 2013MNRAS.432.3186M

Al 2-B