Wil 1 SySt-1

SUSPECTED WILLMAN 1

Constellation
Ursa Major

Equatorial coordinates
α = 10 49 27.858
δ = +51 03 46.160

Galactic coordinates
l = 158.5391°
b = 56.7877°

Suspected	2020^Ref
Confirmed	-
Symbiotic IR type	-
Hot component type	-
Outbursts	-

Identifiers

Wil 1 SySt-1	IRAS -	GSC2.4.2 N93N007813	AAVSO -
SIMBAD [SSI2008] 386	Pan-STARRS 169271623661036075	SAO -	VSX -
GAIA DR3 835977725893619712	SkyMapper -	WRAY -	GCVS -
2MASS -	HIP -	Hen -	BD -
WISE J104928.23+510345.8	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 (°)	162.3661^Ref	Parallax (mas)	0.373±0.607^Ref	Reddening E(B-V) (mag)	0.01±0.0^Ref ^{, Note}
Declination (°)	51.0628^Ref	Distance (kpc)	1.64^Ref ^{, Note}, 1.57^Ref ^{, Note}
Galactic longitude (°)	158.5391^Ref	Proper motion in α (mas/yr)	0.03±0.45^Ref
Galactic latitude (°)	56.7877^Ref	Proper motion in δ (mas/yr)	-1.04±0.66^Ref

Observations

X-Ray	Yes^Ref	IR type	-	Radio	-
X-Ray type	β^Ref	J (mag)	-	Flickering	-
GALEX FUV (mag)	-	H (mag)	-	Outbursts	-
GALEX NUV (mag)	-	K (mag)	-	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	16.92^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	16.06^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	12.82^Ref	IPmax (eV)	-
B (mag)	-	WISE W4 (mag)	8.73^Ref	[O III] lines	-
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	-
R (mag)	19.92^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	-
BP (mag)	20.63^Ref	IRAS 100μm (Jy)	-
G (mag)	20.37^Ref	AKARI S09 (Jy)	-
RP (mag)	20.07^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	-11.70±2.80^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	-

Cool component

Spectral type	-	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	-
IR type	-	Luminosity (L_⊙)	-	Pulsation period (days)	-
Metallicity [Fe/H]	-1.6^Ref			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

This X-ray source was identified as a symbiotic binary by Saeedi & Sasaki (2020).

References

Martin, N. F., Ibata, R. A., Chapman, S. C. et al., 2007, MNRAS, 380, 1, 281, 2007MNRAS.380..281M
Saeedi, S., Sasaki, M., 2020, MNRAS, 499, 3, 3111, 2020MNRAS.499.3111S

Last updated: November 12, 2020