New Online Database of Symbiotic Variables: ASASSN-V J163807.84-284207.6

Constellation
Scorpius

Equatorial coordinates
α = 16 38 07.833
δ = -28 42 07.687

Galactic coordinates
l = 351.4862°
b = 12.1166°

Suspected	2020^Ref
Confirmed	2021^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning?^Ref
Outbursts	-

Identifiers

ASASSN-V J163807.84-284207.6	IRAS -	GSC2.4.2 S8FS000036	AAVSO 000-BNN-732
SIMBAD [M81] I-517	Pan-STARRS 73552495326427853	SAO -	VSX 800662
GAIA DR3 6032371624106460544	SkyMapper 163807.83-284207.5	WRAY -	GCVS -
2MASS J16380783-2842076	HIP -	Hen -	BD -
WISE J163807.83-284207.6	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 (°)	249.5326^Ref	Parallax (mas)	0.094±0.021^Ref	Reddening E(B-V) (mag)	0.37±0.01^Ref ^{, Note}
Declination (°)	-28.7021^Ref	Distance (kpc)	8.79^Ref ^{, Note}, 7.96^Ref ^{, Note}
Galactic longitude (°)	351.4862^Ref	Proper motion in α (mas/yr)	-2.89±0.02^Ref
Galactic latitude (°)	12.1166^Ref	Proper motion in δ (mas/yr)	-3.26±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)	8.87^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.51^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	8.32^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	8.29^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.89^Ref	IPmax (eV)	35.1^Ref
B (mag)	14.98^Ref	WISE W4 (mag)	7.26^Ref	[O III] lines	Yes^Ref
V (mag)	13.70^Ref	IRAS 12μm (Jy)	-	He II lines	No^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	13.88^Ref	IRAS 100μm (Jy)	-
G (mag)	12.73^Ref	AKARI S09 (Jy)	-
RP (mag)	11.65^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	516?^Ref	γ velocity (km/h)	-184.91±0.83^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	M0.5 III^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	shell-burning?^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Symbiotic candidate selected for AAVSO observing campaing (Waagen, 2020) by Adrian B. Lucy (Columbia University). Subsequently confirmed as a symbiotic star by Lucy (2021).

References

Lucy, A. B., 2021, PhDT, 1, 2021PhDT........17L
Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M
Waagen, E. O., 2020, AAVSO Alert Notice, 708, 1, 2020AAN...708....1W

ASASSN-V J163807.84-284207.6