New Online Database of Symbiotic Variables: Hen 3-860

Constellation
Centaurus

Equatorial coordinates
α = 13 06 12.916
δ = -53 22 52.502

Galactic coordinates
l = 305.1647°
b = 9.4264°

Suspected	2018^Ref
Confirmed	2021^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	Yes^Ref - Z And^Ref

Identifiers

Hen 3-860	IRAS -	GSC2.4.2 S7O1008760	AAVSO 000-BMW-137
SIMBAD WRAY 15-1062	Pan-STARRS -	SAO -	VSX 625154
GAIA DR3 6080005908098156032	SkyMapper 130612.93-532252.5	WRAY 15-1062	GCVS -
2MASS J13061292-5322524	HIP -	Hen 3-860	BD -
WISE J130612.92-532252.4	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 (°)	196.5538^Ref	Parallax (mas)	0.104±0.027^Ref	Reddening E(B-V) (mag)	0.45±0.01^Ref ^{, Note}
Declination (°)	-53.3813^Ref	Distance (kpc)	5^Ref 6.39^Ref ^{, Note}, 6.81^Ref ^{, Note}
Galactic longitude (°)	305.1647^Ref	Proper motion in α (mas/yr)	-8.65±0.03^Ref
Galactic latitude (°)	9.4264^Ref	Proper motion in δ (mas/yr)	-0.13±0.02^Ref

Observations

X-Ray	-	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	9.79^Ref	Flickering	No^Ref
GALEX FUV (mag)	-	H (mag)	8.73^Ref	Outbursts	Yes^Ref
GALEX NUV (mag)	-	K (mag)	8.38^Ref	Outburst type	Z And^Ref
IUE	No^Ref	WISE W1 (mag)	8.24^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	8.30^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.93^Ref	IPmax (eV)	99^Ref
B (mag)	16.83^Ref	WISE W4 (mag)	7.47^Ref	[O III] lines	Yes^Ref
V (mag)	14.78^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	14.91^Ref	IRAS 100μm (Jy)	-
G (mag)	13.19^Ref	AKARI S09 (Jy)	-
RP (mag)	11.94^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	602.1±4.8^Ref	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	Yes^Ref			Mass ratio	-
Orbital ephemeris	Min (V) = 2458594.8±3.2 + 602.1±4.8 x E^Ref

Cool component

Spectral type	M2-3III^Ref	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	3550^Ref	Radius (R_⊙)	60-75^Ref	Type	-
IR type	S^Ref	Luminosity (L_⊙)	540-760^Ref	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_⊙)	1170^Ref
Lower limit (K)	54000^Ref, 99000^Ref
Upper limit (K)	180000^Ref

Links

SIMBAD CDS Portal ARAS Database

Notes

Detected in outburst, initially suggested as a possible symbiotic system by amateur astronomer Gabriel Murawski, and later confirmed to be an eclipsing symbiotic star by Merc et al. (2021). Detailed analysis of this object was published by Merc et al. (2022).

References

Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M
Merc, J., Gális, R., Wolf, M. et al., 2021, MNRAS, 506, 3, 4151, 2021MNRAS.506.4151M
Merc, J., Gális, R., Wolf, M. et al., 2022, MNRAS, 510, 1, 1404, 2022MNRAS.510.1404M

Hen 3-860