Al 2-O

SUSPECTED MILKY WAY

Constellation
Scorpius

Equatorial coordinates
α = 17 51 45.289
δ = -32 03 04.034

Galactic coordinates
l = 358.0100°
b = -2.7370°

Suspected	2009^Ref
Confirmed	-
Symbiotic IR type	D'?^Ref
Hot component type	-
Outbursts	-

Identifiers

Al 2-O	IRAS 17485-3202	GSC2.4.2 S8DE015804	AAVSO -
SIMBAD PN Al 2-O	Pan-STARRS -	SAO -	VSX -
GAIA DR3 4043622756199128064	SkyMapper 175145.29-320303.3	WRAY -	GCVS -
2MASS J17514529-3203038	HIP -	Hen -	BD -
WISE J175145.29-320304.0	TYC -	ESO -	HD -

Symbiotic Catalogs

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

Position

Right ascension (°)	267.9387^Ref	Parallax (mas)	0.152±0.063^Ref	Reddening E(B-V) (mag)	1.46±0.09^Ref ^{, Note}
Declination (°)	-32.0511^Ref	Distance (kpc)	5.65^Ref ^{, Note}, 4.87^Ref ^{, Note}
Galactic longitude (°)	358.0100^Ref	Proper motion in α (mas/yr)	-1.02±0.07^Ref
Galactic latitude (°)	-2.7370^Ref	Proper motion in δ (mas/yr)	-2.99±0.05^Ref

Observations

X-Ray	-	IR type	D'?^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	12.71^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	11.73^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	10.84^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	8.97^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	8.12^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	5.42^Ref	IPmax (eV)	-
B (mag)	-	WISE W4 (mag)	2.30^Ref	[O III] lines	-
V (mag)	16.40^Ref	IRAS 12μm (Jy)	2.43^Ref	He II lines	-
R (mag)	-	IRAS 25μm (Jy)	1.07^Ref	[Fe VII] lines	-
I (mag)	14.59^Ref	IRAS 60μm (Jy)	12.40^Ref	O VI lines	-
BP (mag)	17.11^Ref	IRAS 100μm (Jy)	98.70^Ref
G (mag)	16.01^Ref	AKARI S09 (Jy)	0.24^Ref
RP (mag)	14.76^Ref	AKARI S18 (Jy)	0.58^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	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

The object is considered a possible symbiotic candidate, as suggested in Miszalski et al. (2009).

References

Miszalski, B., Acker, A., Moffat, A. F. J. et al., 2009, A&A, 496, 3, 813, 2009A&A...496..813M

Last updated: November 5, 2019