GaSS 1-15

LIKELY MILKY WAY

Constellation
Equuleus

Equatorial coordinates
α = 21 10 01.503
δ = +04 02 35.294

Galactic coordinates
l = 54.3162°
b = -28.2008°

Suspected	2021^Ref
Confirmed	-
Symbiotic IR type	S?^Ref
Hot component type	accreting-only?^Ref
Outbursts	-

Identifiers

GaSS 1-15	IRAS -	GSC2.4.2 N2KM001011	AAVSO -
SIMBAD UCAC4 471-126421	Pan-STARRS 112853175060132139	SAO -	VSX 1536549
GAIA DR3 1732130353080961536	SkyMapper -	WRAY -	GCVS -
2MASS J21100151+0402356	HIP -	Hen -	BD -
WISE J211001.50+040235.3	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 (°)	317.5063^Ref	Parallax (mas)	0.350±0.026^Ref	Reddening E(B-V) (mag)	0.08±0.0^Ref ^{, Note}
Declination (°)	4.0431^Ref	Distance (kpc)	2.9^Ref 2.65^Ref ^{, Note}, 2.53^Ref ^{, Note}
Galactic longitude (°)	54.3162^Ref	Proper motion in α (mas/yr)	-7.37±0.03^Ref
Galactic latitude (°)	-28.2008^Ref	Proper motion in δ (mas/yr)	-11.24±0.02^Ref

Observations

X-Ray	Yes^Ref	IR type	S?^Ref	Radio	-
X-Ray type	-	J (mag)	8.86^Ref	Flickering	Yes^Ref
GALEX FUV (mag)	21.66^Ref	H (mag)	8.05^Ref	Outbursts	-
GALEX NUV (mag)	21.93^Ref	K (mag)	7.84^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	7.67^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.91^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.67^Ref	IPmax (eV)	13.6^Ref
B (mag)	13.76^Ref	WISE W4 (mag)	7.41^Ref	[O III] lines	No^Ref
V (mag)	12.05^Ref	IRAS 12μm (Jy)	-	He II lines	No^Ref
R (mag)	11.74^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	12.41^Ref	IRAS 100μm (Jy)	-
G (mag)	11.35^Ref	AKARI S09 (Jy)	-
RP (mag)	10.34^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	229^Ref	γ velocity (km/h)	42.63±2.35^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 (V) = 2457757 + 229 x E^Ref

Cool component

Spectral type	M2^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	-	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	accreting-only?^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Candidate for the accreting-only symbiotic star selected from the GALAH high-resolution spectroscopic survey (Munari et al., 2021).

References

Munari, U., Traven, G., Masetti, N. et al., 2021, MNRAS, 505, 4, 6121, 2021MNRAS.505.6121M

Last updated: August 21, 2021