V3890 Sgr

Constellation
Sagittarius

Equatorial coordinates
α = 18 30 43.283
δ = -24 01 08.980

Galactic coordinates
l = 9.2035°
b = -6.4434°

Suspected	1990^Ref
Confirmed	1991^Ref
Symbiotic IR type	S^Ref
Hot component type	accreting-only^Ref
Outbursts	Yes^Ref - SyRN^Ref

Identifiers

V3890 Sgr	IRAS -	GSC2.4.2 S9T3043329	AAVSO 000-BCC-531
SIMBAD V* V3890 Sgr	Pan-STARRS 79172776803877323	SAO -	VSX 31590
GAIA DR3 4077352126434336640	SkyMapper 183043.28-240108.7	WRAY -	GCVS V3890 Sgr
2MASS J18304328-2401089	HIP -	Hen -	BD -
WISE J183043.28-240108.9	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	V3890 Sgr (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	V3890 Sgr (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	V3890 Sgr (Conf.)

Position

Right ascension (°)	277.6803^Ref	Parallax (mas)	0.048±0.045^Ref	Reddening E(B-V) (mag)	0.48±0.01^Ref ^{, Note}
Declination (°)	-24.0192^Ref	Distance (kpc)	9^Ref 7.33^Ref ^{, Note}, 7.57^Ref ^{, Note}
Galactic longitude (°)	9.2035^Ref	Proper motion in α (mas/yr)	-3.75±0.05^Ref
Galactic latitude (°)	-6.4434^Ref	Proper motion in δ (mas/yr)	-2.17±0.04^Ref

Observations

X-Ray	Yes^Ref	IR type	S^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	9.83^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	8.77^Ref	Outbursts	Yes^Ref
GALEX NUV (mag)	-	K (mag)	8.26^Ref	Outburst type	SyRN^Ref
IUE	No^Ref	WISE W1 (mag)	7.88^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	7.89^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.36^Ref	IPmax (eV)	361^Ref
B (mag)	13.50^Ref	WISE W4 (mag)	7.02^Ref	[O III] lines	Yes^Ref
V (mag)	15.94^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	14.80^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	12.61^Ref	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	15.82^Ref	IRAS 100μm (Jy)	-
G (mag)	14.09^Ref	AKARI S09 (Jy)	-
RP (mag)	12.75^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	747.6±0.33^Ref	γ velocity (km/h)	-	Size of giant’s orbit (AU)	-
Eccentricity	-	RV of giant (km/h)	-	Separation (AU)	-
Inclination (°)	68±1^Ref	Inferior conj. of giant (JD)	-	Mass function	-
Eclipses	No^Ref			Mass ratio	0.78^Ref
Orbital ephemeris	Min (B) = 2456985.2±5.8 + 747.6±0.33 x E^Ref

Cool component

Spectral type	M5^Ref	Mass (M_⊙)	1.05±0.11^Ref	Pulsation	Yes^Ref
Eff. temperature (K)	3200^Ref	Radius (R_⊙)	166^Ref	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	2600^Ref	Pulsation period (days)	106±3^Ref, 104.5±1^Ref
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

Type/Spectral type	WD^Ref	Mass (M_⊙)	1.35^Ref	Spin period (min)	-
Shell-burning/Accreting-only	accreting-only^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	50-70^Ref
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

The first outburst of V3890 Sgr was detected in 1962 (Dinerstein & Hoffleit, 1973), followed by a second in 1990 (Kilmartin et al., 1990), and a third in 2019 (Strader et al., 2019). In Wagner et al. (1990), similarities between V3890 Sgr and V745 Sco were noted, while González-Riestra et al. (1990) and Sekiguchi (1990) suggested a resemblance to RS Oph. Additionally, Sekiguchi (1990) observed emerging TiO bands indicative of an M4 III star. The symbiotic nature of V3890 Sgr was confirmed by Harrison et al. (1991) and Harrison et al. (1993). A detailed analysis of binary parameters and pre-outburst activity is presented in Mikołajewska et al. (2021), while the evolution during the outburst is discussed by Page et al. (2020) and Ness et al. (2022).

References

Anupama, G. C., Mikołajewska, J., 1999, A&A, 344, 177, 1999A&A...344..177A
Beardmore, A. P., Page, K. L., Markwardt, C. B. et al., 2019, ATel, 13086, 1, 2019ATel13086....1B
Dinerstein, H., Hoffleit, D., 1973, IBVS, 845, 1, 1973IBVS..845....1D
Evans, A., Geballe, T. R., Woodward, C. E. et al., 2022, MNRAS, 517, 4, 6077, 2022MNRAS.517.6077E
González-Riestra, R., Cassatella, A., Monier, R. et al., 1990, IAUC, 5021, 1, 1990IAUC.5021....1G
González-Riestra, R., 1992, A&A, 265, 71, 1992A&A...265...71G
Harrison, T. E., Johnson, J. J., Spyromilio, J., 1991, BAAS, 23, 1324, 1991BAAS...23.1324H
Harrison, T. E., Johnson, J. J., Spyromilio, J., 1993, AJ, 105, 320, 1993AJ....105..320H
Kaminsky, B., Evans, A., Pavlenko, Y. V. et al., 2022, MNRAS, 517, 4, 6064, 2022MNRAS.517.6064K
Kilmartin, P., Gilmore, A., Jones, A. F. et al., 1990, IAUC, 5002, 1, 1990IAUC.5002....1K
Mikołajewska, J., Iłkiewicz, K., Gałan, C. et al., 2021, MNRAS, 504, 2, 2122, 2021MNRAS.504.2122M
Ness, J.-U., Beardmore, A. P., Bezak, P. et al., 2022, A&A, 658, A169, 2022A&A...658A.169N
Orio, M., Drake, J. J., Ness, J.-U. et al., 2020, ApJ, 895, 2, 80, 2020ApJ...895...80O
Page, K. L., Kuin, N. P. M., Beardmore, A. P. et al., 2020, MNRAS, 499, 4, 4814, 2020MNRAS.499.4814P
Sekiguchi, K., 1990, IAUC, 5047, 2, 1990IAUC.5047....2S
Strader, J., Chomiuk, L., Aydi, E. et al., 2019, ATel, 13047, 1, 2019ATel13047....1S
Wagner, R. M., Bertram, R., Starrfield, S. G., 1990, IAUC, 5006, 1, 1990IAUC.5006....1W
Williams, R. E., Hamuy, M., Phillips, M. M. et al., 1991, ApJ, 376, 721, 1991ApJ...376..721W