New Online Database of Symbiotic Variables: Hen 3-1768

Constellation
Octans

Equatorial coordinates
α = 19 59 48.361
δ = -82 52 37.579

Galactic coordinates
l = 310.7206°
b = -29.0059°

Suspected	2018^Ref
Confirmed	2018^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

Hen 3-1768	IRAS -	GSC2.4.2 SAAY000156	AAVSO 000-BMQ-668
SIMBAD Hen 3-1768	Pan-STARRS -	SAO -	VSX 117633
GAIA DR3 6347427816233092224	SkyMapper 195948.36-825237.4	WRAY -	GCVS -
2MASS J19594848-8252374	HIP -	Hen 3-1768	BD -
WISE J195948.40-825237.5	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 (°)	299.9515^Ref	Parallax (mas)	0.119±0.017^Ref	Reddening E(B-V) (mag)	0.21±0.01^Ref ^{, Note}
Declination (°)	-82.8771^Ref	Distance (kpc)	7.38^Ref ^{, Note}, 7.58^Ref ^{, Note}
Galactic longitude (°)	310.7206^Ref	Proper motion in α (mas/yr)	-6.75±0.03^Ref
Galactic latitude (°)	-29.0059^Ref	Proper motion in δ (mas/yr)	-5.59±0.02^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	8.84^Ref	Flickering	No^Ref
GALEX FUV (mag)	14.59^Ref	H (mag)	7.94^Ref	Outbursts	-
GALEX NUV (mag)	14.91^Ref	K (mag)	7.70^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	7.42^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.42^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	6.71^Ref	IPmax (eV)	114^Ref
B (mag)	13.12^Ref	WISE W4 (mag)	5.85^Ref	[O III] lines	Yes^Ref
V (mag)	11.64^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	11.17^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	10.13^Ref	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	11.87^Ref	IRAS 100μm (Jy)	-
G (mag)	11.01^Ref	AKARI S09 (Jy)	0.12^Ref
RP (mag)	10.08^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	8.71±2.36^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	K4-7^Ref, K?^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	SRb^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	52.67^Ref
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)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal ARAS Database

Notes

Selected based on SkyMapper uvgriz photometric observations, this star was confirmed as a symbiotic star by Lucy et al. (2018). Spectral analysis revealed the presence of O VI lines. Independently, Angeloni et al. (2019) affirmed its symbiotic nature through photometric measurements in the filter centered on O VI lines.

References

Angeloni, R., Gonçalves, D. R., Akras, S. et al., 2019, AJ, 157, 4, 156, 2019AJ....157..156A
Lucy, A. B., Sokoloski, J. L., Nuñez, N. E. et al., 2018, RNAAS, 2, 4, 229, 2018RNAAS...2..229L
Lucy, A. B., 2021, PhDT, 1, 2021PhDT........17L
Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M

Hen 3-1768