04218+1929 SIG 1

04^h 21^m 49.56^s +19° 29' 08.6" P.A. 75.00 sep 0.2 mag 13.10,13.90 Sp M7+M9.5

Coord 2000	04218+1929	Discov num	SIG 1	Comp		Coord arcsec 2000	04 21 49.56 +19 29 08.6
Date first	2002	Date last	2012	Obs	20
Pa first	91	Pa last	75.3	P.A. Now (θ)	57.3°
Sep first	0.1	Sep last	0.159	Sep. Now (ρ)	0.093"
Mag pri	13.10	Mag sec	13.90	delta mag (ΔM)	0.8	Spectral class	M7+M9.5 (red/red)
Pri motion ra	+116	Sec motion ra
Pri motion dec	-038	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Taurus

Gaia DR2

48190739948429184

ORBITAL ELEMENTS

Period (P)	14.82y	± 0.24	Periastron (T)	58880m (2020.085y)	± 140	Semi-major axis (a)	0.0965a	± 0.0014
Eccentricity (e)	0.706	± 0.012	Inclination (i)	62.4°	± 1.6	Longitude of periastron (ω)	168°	± 4
Node (Ω)	82.1°	± 1.1	Notes	n		Reference	Dup2017
Equinox			Last observation			Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	82.7	0.155
2001	86.0	0.142
2002	90.3	0.122
2003	96.8	0.093
2004	111.8	0.052
2005	223.7	0.021
2006	334.8	0.024
2007	40.0	0.054
2008	55.6	0.087
2009	63.0	0.114
2010	67.8	0.135
2011	71.4	0.150
2012	74.5	0.159
2013	77.4	0.162
2014	80.2	0.161
2015	83.2	0.153
2016	86.7	0.139
2017	91.2	0.117
2018	98.4	0.086
2019	117.8	0.043
2020	247.9	0.026
2021	355.5	0.027
2022	44.1	0.060
2023	57.3	0.093
2024	64.0	0.118
2025	68.5	0.138
2026	72.0	0.152
2027	75.1	0.160
2028	77.9	0.163
2029	80.7	0.160
2030	83.8	0.151

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS 04218+1929 SIG 1 : NOTES

discov_num	notes	refcode
SIG 1	LP 415-20 = Bryja 262. Spectral types M7.0, M9.5. Probable Hyades
	member. Estimated orbital period 23 +7/-6 yrs.	Sig2003
	Konopacky et al. (2010) derive a distance of 21. +/- 5. pc and a
	system mass of 0.09 +/- 0.06 Msun.	Kon2010

REFERENCES

refcode	metd	author	reference
Dup2017	A j	Dupuy, T.J. & Liu, M.C.	2017ApJS..231...15D
Dup2017	+orb	ApJS 231, 15, 2017
Kon2010	Ag j	Konopacky, Q.M., Ghez, A.M., Barman, T.S., Rice, E.L., Bailey, III, J.I.,	2010ApJ...711.1087K
Kon2010		White, R.J., McLean, I.S., & Duchene, G.
Kon2010		ApJ 711, 1087, 2010
Sig2003	A j	Siegler, N., Close, L.M., Mamajek, E.E., & Freed, M.	2003ApJ...598.1265S
Sig2003		ApJ 598, 1265, 2003

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
04218+1929	SIG 1		2002	1	91	0.1	13.10	13.90		N	042149.56+192908.6
04218+1929	SIG 1		2008	5	63	0.1	13.10	13.90	M7+M9.5	NOD	042149.56+192908.6
04218+1929	SIG 1		2010	9	68	0.1	13.10	13.90	M7 M9.5	NOD	042149.56+192908.6
04218+1929	SIG 1		2012	20	75	0.2	13.10	13.90	M7+M9.5	NO	042149.56+192908.6

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WDS 04218+1929 SIG 1 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 04218+1929 SIG 1 : MEASURES

No records found.

WDS 04218+1929 : VIRTUAL EYEPIECE

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WDS 04218+1929 : ALADIN DSS IMAGE @ 04^h 21^m 49.56^s +19° 29' 08.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 04218+1929 SIG 1 : NEIGHBORHOODS

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Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		04218+1929	SIG 1		75	0.2
Show		04217+1928	BU 9004		46	55.8	2
Show		04220+1932	GHE 6	AB	191	0.7	4
Show		04220+1932	GHE 6	A,Ba	195	0.7	4
Show		04220+1932	GHE 6	A,Bb	195	0.6	4
Show		04220+1932	NSE 1	AC	358	0.3	4
Show		04220+1932	KRS 2	Ba,Bb	20	0.1	4
Show		04220+1932	CSE 1	AD	199	0.1	4
Show		04221+1934	KOH 9	AB	317	12.0	7
Show		04221+1934	DAE 25	AC	187	7.7	7
Show		04218+1949	KNT 2		25	3.3	20
Show		04203+1937	TDS2828		264	3.1	23
Show		04201+1953	LDS1164		139	30.2	34
Show		04221+2007	LDS3581		179	14.4	38
Show		04242+1959	LDS3583		296	29.0	45
Show		04222+1844	SLE 270		98	11.0	46
Show		04249+1903	OCC 921		-1	0.1	52
Show		04255+1942	COU 565		136	0.7	54
Show		04255+1946	STJ 27		344	1.5	56
Show		04252+1858	RAO 546		140	0.8	58
Show		04255+1901	HEI 456		221	2.9	59
Show		04203+1833	LDS5540	AB	266	264.2	60
Show		04203+1833	LDS5540	AC	266	306.8	60
Show		04216+2029	LDS5543	AB	89	113.6	61
Show		04216+2029	SKF1934	Aa,Ab	224	1.2	61
Show		04175+1911	A 2350		127	0.6	64
Show		04174+1945	LDS5536		357	12.1	65
Show		04259+1852	BU 1185		203	0.3	69
Show		04170+1941	HO 328		358	0.4	69
Show		04223+1820	LDS2229		234	3.5	70
Show		04266+1912	GWP 585		183	37.5	70
Show		04258+2012	LDS2235		112	27.6	72
Show		04167+1909	LDS5530		199	34.7	75
Show		04256+1838	COU2681	AB	253	1.1	75
Show		04256+1838	GII 129	Aa,Ab	171	0.2	75
Show		04200+1820	LDS2225		229	5.8	76
Show		04270+1907	STF 546		182	7.0	77
Show		04224+2049	BU 87		168	1.9	81
Show		04276+1927	RED 5		162	0.1	82
Show		04210+2050	LDS3578		351	44.4	83
Show		04162+1853	GWP 573		236	163.2	88
Show		04207+2056	LDS2226		5	21.1	89
Show		04174+2033	KPP3562		156	6.2	89
Show		04173+2035	LDS5535	AB	299	180.7	92
Show		04173+2035	LDS5535	AC	157	6.0	92
Show		04157+1858	OCC 432		-1	0.0	93
Show		04154+1948	UC 1142		105	55.6	93
Show		04235+2059	CHR 16	AB	1	0.2	93
Show		04215+2102	OCC 684		-1	0.1	94
Show		04270+2030	LDS2237	AB	339	42.8	95
Show		04270+2030	LDS2237	BC	55	14.0	95

WDS 04218+1929 : COMPONENTS

	A
B	pa=74.4° sep=0.15"

04218+1929 A

Componente originario normalizzato	AB		Coord arcsec 2000	042149.56+192908.6		Mag	13.1		Spectral class	M7 (red)
PmRA	116.00		PmDE	-38.0

04218+1929 B

Componente originario normalizzato	AB		Coord arcsec 2000	042149.57+192908.6		Mag	13.9		Spectral class	M9.5 (red)
Calc delta mag	0.8		Calc coord	yes