18471+5523 SIG 5

18^h 47^m 03.42^s +55° 22' 43.3" P.A. 126.00 sep 0.2 mag 12.55,12.81 Sp M7+M7.5

Coord 2000	18471+5523	Discov num	SIG 5	Comp		Coord arcsec 2000	18 47 03.42 +55 22 43.3
Date first	2003	Date last	2013	Obs	17
Pa first	91	Pa last	125.7	P.A. Now (θ)	125.7°
Sep first	0.1	Sep last	0.238	Sep. Now (ρ)	0.238"
Mag pri	12.55	Mag sec	12.81	delta mag (ΔM)	0.26	Spectral class	M7+M7.5 (red/red)
Pri motion ra	+132	Sec motion ra
Pri motion dec	-068	Sec motion dec
Notes	N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)

Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Draco

Gaia DR2

2147054361726599552

ORBITAL ELEMENTS

Period (P)	34y	± 5	Periastron (T)	61700d (2027.805y)	± 2000	Semi-major axis (a)	186m	± 18
Eccentricity (e)	0.31	± 0.09	Inclination (i)	75.9°	± 0.7	Longitude of periastron (ω)	158°	± 31
Node (Ω)	127.9°	± 0.5	Notes	n		Reference	Dup2017
Equinox			Last observation	2013		Grade	4	(1=Definitive, 9=Indet.)

label	theta	rho
2000	0.6	0.054
2001	36.8	0.046
2002	70.6	0.057
2003	89.7	0.079
2004	100.2	0.103
2005	106.6	0.128
2006	111.0	0.151
2007	114.3	0.172
2008	116.9	0.190
2009	119.0	0.206
2010	120.9	0.219
2011	122.6	0.229
2012	124.2	0.235
2013	125.7	0.238
2014	127.2	0.238
2015	128.7	0.233
2016	130.3	0.225
2017	132.1	0.213
2018	134.1	0.197
2019	136.5	0.177
2020	139.7	0.152
2021	144.2	0.124
2022	151.5	0.093
2023	166.4	0.061
2024	205.5	0.038
2025	261.2	0.047
2026	285.9	0.075
2027	296.8	0.103
2028	303.4	0.123
2029	308.6	0.131
2030	313.6	0.128
2031	319.3	0.115
2032	326.9	0.096
2033	338.9	0.074
2034	0.6	0.054
2035	36.8	0.046
2036	70.6	0.057
2037	89.7	0.079
2038	100.2	0.103
2039	106.6	0.128
2040	111.0	0.151
2041	114.3	0.172
2042	116.9	0.190
2043	119.0	0.206
2044	120.9	0.219
2045	122.6	0.229
2046	124.2	0.235
2047	125.7	0.238
2048	127.2	0.238
2049	128.7	0.233
2050	130.3	0.225

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

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

WDS 18471+5523 SIG 5 : NOTES

discov_num	notes	refcode
SIG 5	Konopacky et al. (2010) derive a distance of 29.8 +/- 7.1 pc and a
	system mass of 0.18 +0.35/-0.13 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

DISCOVERER

discov	author
DUP	Dupuy, T.J., Liu, M.C., & Ireland, M.J.
DUP	Dupuy, T.J., Forbrich, J., Rizzuto, A., Mann, A.W., Aller, K., Liu, M.C.,
DUP	Kraus, A.L., & Berger, E.
DUP	Dupuy, T.J., Kratter, K.M., Kraus, A.L., Isaacson, H., Mann, A.W., Ireland, M.J.,
DUP	Howard, A.W., & Huber, D.
DUP	Dupuy, T.J., Liu, M.C., Best, W.M.J., Mann, A.W., Tucker, M.A., Zhang, Z., Baraffe,
KON	Konopacky, Q.M., Ghez, A.M., Duchene, G., McCabe, C., & Macintosh, B.A.
KON	Konopacky, Q.M., Ghez, A.M., Barman, T.S., Rice, E.L., Bailey, III, J.I.,
KON	White, R.J., McLean, I.S., & Duchene, G.
SIG	Siegler, N., Close, L., Burgasser, A.J., Cruz, K.L., Marois, Ch., Macintosh, B.,
SIG	& Barman, T.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	dm_number	notes	coord_arcsec_2000
18471+5523	SIG 5		2003	1	91	0.1	12.55	12.81				184703.42+552243.3
18471+5523	SIG 5		2007	2	112	0.2	12.55	12.81			D	184703.42+552243.3
18471+5523	SIG 5		2009	8	119	0.2	12.55	12.81	M7+M7.5		NOD	184703.42+552243.3
18471+5523	SIG 5		2013	17	126	0.2	12.55	12.81	M7+M7.5		NO K	184703.42+552243.3

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WDS 18471+5523 SIG 5 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18471+5523 SIG 5 : MEASURES

No records found.

WDS 18471+5523 : VIRTUAL EYEPIECE

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WDS 18471+5523 : ALADIN DSS IMAGE @ 18^h 47^m 03.42^s +55° 22' 43.3"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18471+5523 SIG 5 : 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		18471+5523	SIG 5		126	0.2	0
Show		18499+5516	MLR 574		55	1.1	26
Show		18471+5455	TOI1746		354	0.9	29
Show		18445+5457	TOI1745		10	1.0	34
Show		18426+5532	ISO 7	Aa,Ab	135	0.2	39
Show		18426+5532	H 6 37	AB	156	146.5	39
Show		18426+5532	H 6 37	AC	340	331.2	39
Show		18440+5558	STI2384		142	3.8	45
Show		18443+5443	UC 3659		178	8.1	47
Show		18421+5501	KPP1134		336	8.9	48
Show		18486+5613	TDT1062		305	0.8	53
Show		18542+5535	STI2395		164	12.1	64
Show		18463+5630	DAL 31		265	49.3	68
Show		18390+5559	A 1380	AB	20	1.0	78
Show		18390+5559	A 1380	AB,C	332	11.8	78
Show		18563+5537	MLB 138	AB	63	4.9	80
Show		18433+5637	STI2383		342	14.5	81
Show		18458+5645	MLB 137		165	2.0	83
Show		18471+5356	A 1382		226	4.6	87
Show		18541+5417	ES 976		278	5.0	90
Show		18563+5432	HDS2682	Aa,Ab	327	0.4	95
Show		18563+5432	GIC 154	AB	170	118.8	95
Show		18438+5654	BU 465		289	2.7	96
Show		18351+5521	STI2379		358	14.4	102
Show		18560+5414	TDT1133		262	0.9	104
Show		18598+5543	ES 1748		54	6.6	110
Show		18593+5450	A 1387	AB	351	0.3	111
Show		18593+5450	MLR 575	AB,C	227	21.8	111
Show		18510+5713	STI2393		205	11.5	116
Show		18569+5645	STF2433	AB	122	7.4	117
Show		18569+5645	STF2433	AC	140	39.5	117
Show		18383+5353	A 1378	AB	119	0.4	118
Show		18383+5353	A 1378	AB,C	273	14.1	118
Show		18481+5721	STI2389		226	13.9	119
Show		18459+5731	STI2386		9	17.3	129
Show		18596+5635	STI2403		92	6.4	129
Show		18426+5727	STI2382		138	12.4	130
Show		18319+5459	TDT 929		152	2.3	132
Show		18525+5319	KPP4125		267	1.7	133
Show		18557+5714	TDT1129		14	0.5	133
Show		18563+5713	STI2400		138	13.1	135
Show		18337+5638	TDS 929		78	1.2	136
Show		18380+5722	STI2380		4	10.3	141
Show		19026+5719	STI2407		43	6.1	144
Show		19000+5658	KPP3333		278	6.9	145
Show		18576+5331	LDS4802	AB	198	2.3	145
Show		18576+5331	LDS4802	AC	163	42.7	145
Show		18576+5331	LDS4802	BC	162	41.7	145
Show		18569+5723	ES 1747		350	1.6	146
Show		18590+5713	STI2402		56	4.4	148
Show		19035+5614	ES 1749	BC	252	17.9	149

WDS 18471+5523 : COMPONENTS

	A
B	pa=125.7° sep=0.24"

18471+5523 A

Coord arcsec 2000	184703.42+552243.3		Mag	12.55		Spectral class	M7 (red)		PmRA	132.00
PmDE	-68.0

18471+5523 B

Coord arcsec 2000	184703.44+552243.2		Mag	12.81		Spectral class	M7.5 (red)		Delta magnitude	0.26
Coordinate calculated	yes