17502+4424 SIG 3

17^h 50^m 12.91^s +44° 24' 04.3" P.A. 68.00 sep 0.2 mag 13.20,14.00 Sp M7.5+L0

Coord 2000	17502+4424	Discov num	SIG 3	Comp		Coord arcsec 2000	17 50 12.91 +44 24 04.3
Date first	2002	Date last	2010	Obs	12
Pa first	340	Pa last	67.6	P.A. Now (θ)	67.6°
Sep first	0.2	Sep last	0.222	Sep. Now (ρ)	0.222"
Mag pri	13.20	Mag sec	14.00	delta mag (ΔM)	0.8	Spectral class	M7.5+L0 (red/very deep red)
Pri motion ra	-014	Sec motion ra
Pri motion dec	+138	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

Hercules

Gaia DR2

1349492949336359936

ORBITAL ELEMENTS SOLUTION #1

Period (P)	317y	± 240	Periastron (T)	2004.3y	± 1.8	Semi-major axis (a)	0.728a	± 0.375
Eccentricity (e)	0.71	± 0.18	Inclination (i)	44°	± 10	Longitude of periastron (ω)	267°	± 26
Node (Ω)	99°	± 6	Notes	n		Reference	Kon2010
Equinox	2000		Last observation	2009		Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	318.3	0.198
2001	326.7	0.182
2002	336.7	0.168
2003	348.2	0.158
2004	0.9	0.153
2005	14.1	0.153
2006	26.8	0.158
2007	38.3	0.168
2008	48.3	0.182
2009	56.8	0.198
2010	64.0	0.215
2011	70.1	0.233
2012	75.3	0.252
2013	79.8	0.270
2014	83.7	0.287
2015	87.2	0.305
2016	90.3	0.321
2017	93.1	0.338
2018	95.7	0.353
2019	98.0	0.368
2020	100.2	0.383
2021	102.2	0.397
2022	104.0	0.410
2023	105.8	0.423
2024	107.5	0.436
2025	109.0	0.448
2026	110.5	0.460
2027	111.9	0.471
2028	113.2	0.482
2029	114.5	0.492
2030	115.8	0.503

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

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

ORBITAL ELEMENTS SOLUTION #2

Period (P)	170y	± 60	Periastron (T)	2170.9974y		Semi-major axis (a)	580m	± 150
Eccentricity (e)	0.7	± 0.09	Inclination (i)	53°	± 4	Longitude of periastron (ω)	185°	± 26
Node (Ω)	131°	± 10	Notes	n		Reference	Dup2017
Equinox			Last observation	2010		Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	304.0	0.175
2001	314.0	0.174
2002	324.4	0.169
2003	335.5	0.163
2004	347.6	0.156
2005	0.6	0.152
2006	14.0	0.151
2007	27.1	0.156
2008	39.0	0.166
2009	49.3	0.179
2010	58.1	0.196
2011	65.3	0.215
2012	71.4	0.236
2013	76.4	0.257
2014	80.7	0.279
2015	84.4	0.300
2016	87.5	0.322
2017	90.3	0.344
2018	92.7	0.365
2019	94.9	0.386
2020	96.8	0.407
2021	98.6	0.427
2022	100.2	0.447
2023	101.7	0.466
2024	103.0	0.485
2025	104.3	0.504
2026	105.4	0.522
2027	106.5	0.539
2028	107.6	0.557
2029	108.5	0.573
2030	109.4	0.590

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

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

WDS 17502+4424 SIG 3 : NOTES

discov_num	notes	refcode
SIG 3	2MASSW J1750129+442404.
	Spectral types M7.5, M9.5. Estimated orbital period 36 +10/-9 yrs.	Sig2003
	Konopacky et al. (2010) derive a distance of 37.6 +/- 12.3 pc and a
	system mass of 0.20 +/- 0.12 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
17502+4424	SIG 3		2002	1	340	0.2	13.20	14.00		N	175012.91+442404.3
17502+4424	SIG 3		2009	7	60	0.2	13.20	14.00	M7.5+L0	NOD	175012.91+442404.3
17502+4424	SIG 3		2010	12	68	0.2	13.20	14.00	M7.5+L0	NO K	175012.91+442404.3

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WDS 17502+4424 SIG 3 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 17502+4424 SIG 3 : MEASURES

No records found.

WDS 17502+4424 : VIRTUAL EYEPIECE

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WDS 17502+4424 : ALADIN DSS IMAGE @ 17^h 50^m 12.91^s +44° 24' 04.3"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 17502+4424 SIG 3 : 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		17502+4424	SIG 3		68	0.2
Show		17480+4406	KPP4061		26	4.2	30
Show		17512+4454	STF2242	AB	325	3.4	33
Show		17512+4454	CTT 26	AC	108	79.7	33
Show		17474+4409	CVR 206		303	10.7	34
Show		17469+4442	BRT 344		185	3.1	41
Show		17483+4506	SMA 79		92	15.3	47
Show		17514+4332	LDS4767		253	15.7	54
Show		17497+4325	LDS4764		41	50.5	59
Show		17446+4440	A 1882		57	2.0	63
Show		17533+4329	TDT 556		257	0.8	65
Show		17481+4324	KPP4062		74	1.8	65
Show		17556+4350	TDT 575		209	0.5	68
Show		17559+4351	ES 1415		130	1.7	70
Show		17526+4531	UC 233		94	24.3	72
Show		17536+4313	ES 2663		333	10.1	82
Show		17506+4547	SLW1214		25	22.2	83
Show		17433+4345	STF2214	AB	210	19.9	84
Show		17433+4345	D 16	BC	150	0.9	85
Show		17571+4343	KPP 404		293	3.7	85
Show		17422+4423	COU1596		104	0.2	86
Show		17425+4458	TDT 470		195	2.2	90
Show		17519+4256	COU1598		231	0.4	90
Show		17505+4554	KPP3323		213	1.6	91
Show		17454+4540	COU1597		301	1.0	91
Show		17439+4323	BWL 47	AB	290	2.8	92
Show		17439+4323	BWL 47	AC	314	9.2	92
Show		17516+4555	A 1883		41	0.6	93
Show		17593+4422	UC 3463		305	51.0	97
Show		17486+4606	CBL 518		34	19.8	104
Show		17428+4310	STF2209		127	29.8	110
Show		18001+4452	LDS4769		312	82.7	110
Show		17571+4303	CBL 520		111	35.8	111
Show		17571+4551	HU 235		289	1.8	114
Show		17567+4557	BVD 258		91	15.5	116
Show		17536+4234	COU1600		251	0.7	116
Show		17596+4314	COU1784		97	2.2	124
Show		17444+4615	TDS 879		37	1.4	127
Show		17453+4229	UC 3398		134	17.3	127
Show		17441+4613	A 1881		209	4.9	127
Show		18011+4521	STF3129		168	30.8	130
Show		18015+4517	STF2270		212	6.3	132
Show		17474+4633	WJD 2		108	2.4	132
Show		18025+4414	OLE 4	Aa,Ab	319	0.1	133
Show		18025+4414	BU 1127	AB	39	0.7	133
Show		17383+4500	ES 1257	AB	296	2.7	133
Show		17383+4500	ES 1257	AC	124	52.3	133
Show		17389+4522	ES 1258		317	12.2	134
Show		17471+4215	A 697		128	0.4	134
Show		18022+4506	CBL 73		293	31.7	135
Show		17557+4626	BAR 43	AB	253	2.0	135

WDS 17502+4424 : COMPONENTS

	A
B	pa=60.0° sep=0.17"

17502+4424 A

Componente originario normalizzato	AB		Coord arcsec 2000	175012.91+442404.3		Mag	13.2		Spectral class	M7.5 (red)
PmRA	-14.00		PmDE	138.0

17502+4424 B

Componente originario normalizzato	AB		Coord arcsec 2000	175012.92+442404.4		Mag	14		Spectral class	L0 (very deep red)
Calc delta mag	0.8		Calc coord	yes