21069+3845 STF2758AB (61 Cyg)

Coord 2000	21069+3845		Discov num	STF2758		Comp	AB		Coord arcsec 2000	21 06 53.95 +38 44 57.9
Date first	1753		Date last	2019		Obs	1804
Pa first	35		Pa last	153		P.A. Now (θ)	153.5°
Sep first	19.6		Sep last	31.8		Sep. Now (ρ)	31.87"
Mag pri	5.20		Mag sec	6.05		delta mag (ΔM)	0.85		Spectral class	K5V+K7V (yellow-orange/yellow-orange)
Pri motion ra	+417		Sec motion ra	+412
Pri motion dec	+326		Sec motion dec	+313
Notes	N O P (See Notes, Orbital solution, 100-year proper motion)

rPM=0.026 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	61 Cyg	70919	21069+3845	STF2758	AB	1753	2019	1804	154	31.9	5.20	6.05	0.85	Y	<===
Show		70919	21069+3845	STF2758	AC	1907	2016	6	219	839.8	5.35	10.23	4.88
Show		70919	21069+3845	STF2758	AD	1918	2016	4	250	748.0	5.35	10.45	5.10
Show		70919	21069+3845	STF2758	AE	1918	2016	12	267	340.8	5.35	9.63	4.28
Show		70919	21069+3845	STF2758	AF	1918	2016	10	240	371.2	5.35	11.30	5.95
Show		70919	21069+3845	STF2758	AG	1921	2016	13	236	260.4	5.35	11.30	5.95
Show		70919	21069+3845	STF2758	AH	1921	2018	32	267	121.8	5.35	9.97	4.62
Show		70919	21069+3845	SMR 1	AI	1921	2018	14	237	33.7	5.35	10.74	5.39
Show		70919	21069+3845	HZE 4	AJ	2006	2015	3	241	17.5	2.25	12.43	10.18
Show		70919	21069+3845	HZE 4	AK	2006	2006	1	83	7.8	2.25	13.05	10.80
Show		70919	21069+3845	SMR 40	AO	1998	2018	10	280	162.5	5.35	12.65	7.30
Show		70919	21069+3845	SMR 40	AP	1998	2018	9	289	154.7	5.35	12.84	7.49
Show		70919	21069+3845	SMR 40	AQ	1998	2018	5	307	71.0	5.35	13.19	7.84
Show		70919	21069+3845	STF2758	BC	1879	2016	6	221	827.6	6.05	10.03	3.98
Show		70919	21069+3845	HZE 4	BL	2006	2006	1	145	9.9	2.74	14.04	11.30
Show		70919	21069+3845	FYM 106	BM	1998	2016	3	238	100.7	6.05	14.30	8.25
Show		70919	21069+3845	FYM 106	BN	1998	2016	3	152	48.3	6.05	14.40	8.35
Show		70919	21069+3845	TNN 15	BR	2005	2005	1	77	11.5	2.54	14.80	12.26

18-fold system
18 visible stars in this system

Precise pa	153		Precise sep	31.85		Name	61 Cyg		Var name	V1803 Cyg
Constellation	Cygnus		SAO	70919		HIP	104214		Tycho2	3168-02800-1
Gaia DR2	27813442688		HD	201091		HR	8085		GC	29509
ADS	14636		GL	Gl 820A		BD	BD+38 4343		Flamsteed	61 Cygni
Flamsteed name	61 Cyg		Distance	3.49		Distance ly	11.38		last precise pa	153
last precise sep	31.85

Period (P)	618.6911y	± 319.9833	Periastron (T)	1699.2787y	± 54.8686	Semi-major axis (a)	25.24738a	± 4.33528
Eccentricity (e)	0.54169	± 0.28094	Inclination (i)	56.299°	± 4.786	Longitude of periastron (ω)	313.932°	± 35.266
Node (Ω)	1.251°	± 15.773	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation	2015

label rho theta 2000 30.622 149.7 2001 30.687 149.9 2002 30.752 150.1 2003 30.815 150.3 2004 30.879 150.5 2005 30.941 150.7 2006 31.004 150.8 2007 31.065 151.0 2008 31.126 151.2 2009 31.187 151.4 2010 31.247 151.6 2011 31.306 151.7 2012 31.365 151.9 2013 31.423 152.1 2014 31.480 152.3 2015 31.537 152.4 2016 31.594 152.6 2017 31.649 152.8 2018 31.704 153.0 2019 31.759 153.1 2020 31.813 153.3 2021 31.866 153.5 2022 31.919 153.6 2023 31.971 153.8 2024 32.022 154.0 2025 32.073 154.1 2026 32.123 154.3 2027 32.173 154.5 2028 32.222 154.6 2029 32.270 154.8 2030 32.318 155.0 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21069+3845	STF2758	AB	2007	1620	151	31.1	5.20	6.05	K5V K7V	NODP	210653.94+384457.8
21069+3845	STF2758	AB	2008	1621	151	31.0	5.20	6.05	K5V K7V	NODP	210653.94+384457.8
21069+3845	STF2758	AB	2010	1642	154	31.1	5.20	6.05	K5V K7V	NODP	210653.94+384457.8
21069+3845	STF2758	AB	2011	1647	151	31.9	5.20	6.05	K5V K7V	NODP	210653.94+384457.8
21069+3845	STF2758	AB	2012	1652	152	31.4	5.35	6.10	K5V K7V	NODP	210653.94+384457.8
21069+3845	STF2758	AB	2013	1666	152	31.5	5.20	6.05	K5V K7V	NODP	210653.95+384457.9
21069+3845	STF2758	AB	2014	1668	152	31.5	5.20	6.05	K5V K7V	NODP	210653.95+384457.9
21069+3845	STF2758	AB	2015	1672	153	31.4	5.20	6.05	K5V+K7V	NO P	210653.95+384457.9
21069+3845	STF2758	AB	2016	1734	152	31.4	5.20	6.05	K5V+K7V	NO P	210653.95+384457.9
21069+3845	STF2758	AB	2017	1736	153	31.7	5.20	6.05	K5V+K7V	NO P	210653.95+384457.9
21069+3845	STF2758	AB	2018	1741	154	31.8	5.20	6.05	K5V+K7V	NO P	210653.95+384457.9
21069+3845	STF2758	AB	2019	1794	153	31.8	5.20	6.05	K5V+K7V	NO P	210653.95+384457.9

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