V3811 Sgr

CONFIRMED MILKY WAY

Constellation
Sagittarius

Equatorial coordinates
α = 18 23 28.998
δ = -21 53 09.595

Galactic coordinates
l = 10.3401°
b = -3.9847°

Suspected	1978^Ref
Confirmed	1978^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

V3811 Sgr	IRAS 18206-2157	GSC2.4.2 SA6F968544	AAVSO 000-BFJ-148
SIMBAD V* V3811 Sgr	Pan-STARRS 81732758708367148	SAO -	VSX 31511
GAIA DR3 4090214522694556800	SkyMapper -	WRAY -	GCVS V3811 Sgr
2MASS J18232900-2153095	HIP -	Hen 2-396	BD -
WISE J182328.99-215309.4	TYC -	ESO 590-19	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	V3811 Sgr (Conf.)	Belzcyński et al. (2001)	V3811 Sgr (Conf.)
Gaposchkin (1957)	-	Kenyon (1986)	V3811 Sgr (Conf.)	Akras et al. (2019)	V3811 Sgr (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	V3811 Sgr (Conf.)

Position

Right ascension (°)	275.8708^Ref	Parallax (mas)	-0.045±0.051^Ref	Reddening E(B-V) (mag)	0.83±0.04^Ref ^{, Note}
Declination (°)	-21.8860^Ref	Distance (kpc)	9.20^Ref ^{, Note}, 6.55^Ref ^{, Note}
Galactic longitude (°)	10.3401^Ref	Proper motion in α (mas/yr)	-3.85±0.05^Ref
Galactic latitude (°)	-3.9847^Ref	Proper motion in δ (mas/yr)	-6.01±0.04^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	No^Ref
X-Ray type	-	J (mag)	10.48^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	9.36^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.88^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	8.22^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	8.07^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	7.23^Ref	IPmax (eV)	54.4^Ref
B (mag)	-	WISE W4 (mag)	6.45^Ref	[O III] lines	Yes^Ref
V (mag)	15.45^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	12.86^Ref	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	14.60^Ref	IRAS 100μm (Jy)	-
G (mag)	13.51^Ref	AKARI S09 (Jy)	-
RP (mag)	12.56^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	600^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	-

Cool component

Spectral type	K5-M0 III^Ref, M3.5 III^Ref	Mass (M_⊙)	-	Pulsation	Yes^Ref
Eff. temperature (K)	3921^Ref	Radius (R_⊙)	-	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	139±15^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

Notes

Allen (1978) reported a reddened star with Balmer, [O III], He I, and He II emission lines.

References

Allen, D. A., 1978, MNRAS, 184, 601, 1978MNRAS.184..601A
Gromadzki, M., Mikołajewska, J., Soszyński, I., 2013, AcA, 63, 4, 405, 2013AcA....63..405G
Medina Tanco, G. A., Steiner, J. E., 1995, AJ, 109, 1770, 1995AJ....109.1770M
Mürset, U., Schmid, H. M., 1999, A&AS, 137, 473, 1999A&AS..137..473M
Sanduleak, N., Stephenson, C. B., 1973, ApJ, 185, 899, 1973ApJ...185..899S
Wright, A. E., Allen, D. A., 1978, MNRAS, 184, 893, 1978MNRAS.184..893W

Last updated: April 18, 2022