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	2018		Obs	1790
Pa first	35		Pa last	154		P.A. Now (θ)	152.6°
Sep first	19.6		Sep last	31.8		Sep. Now (ρ)	31.78"
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	2018	1790	153	31.8	5.20	6.05	0.85	Y	<===
Show			21069+3845	STF2758	AC	1907	2016	6	219	839.8	5.35	10.23	4.88
Show			21069+3845	STF2758	AD	1918	2016	4	250	748.0	5.35	10.45	5.10
Show			21069+3845	STF2758	AE	1918	2016	12	267	340.8	5.35	9.63	4.28
Show			21069+3845	STF2758	AF	1918	2016	10	240	371.2	5.35	11.30	5.95
Show			21069+3845	STF2758	AG	1921	2016	13	236	260.4	5.35	11.30	5.95
Show			21069+3845	STF2758	AH	1921	2017	31	268	117.5	5.35	9.97	4.62
Show			21069+3845	SMR 1	AI	1921	2017	13	239	28.3	5.35	10.74	5.39
Show			21069+3845	HZE 4	AJ	2006	2015	3	241	17.5	2.25	12.43	10.18
Show			21069+3845	HZE 4	AK	2006	2006	1	83	7.8	2.25	13.05	10.80
Show			21069+3845	SMR 40	AO	1998	2017	7	281	163.4	5.35	12.65	7.30
Show			21069+3845	SMR 40	AP	1998	2017	7	285	159.6	5.35	12.84	7.49
Show			21069+3845	SMR 40	AQ	1998	2016	4	316	68.1	5.35	13.19	7.84
Show			21069+3845	STF2758	BC	1879	2016	6	221	827.6	6.05	10.03	3.98
Show			21069+3845	HZE 4	BL	2006	2006	1	145	9.9	2.74	14.04	11.30
Show			21069+3845	FYM 106	BM	1998	2016	3	238	100.7	6.05	14.30	8.25
Show			21069+3845	FYM 106	BN	1998	2016	3	152	48.3	6.05	14.40	8.35
Show			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	153.5		Precise sep	31.779		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	153.5
last precise sep	31.779

Period (P)	678y	± 34	Periastron (T)	1709y	± 16	Semi-major axis (a)	24.272a	± 0.592
Eccentricity (e)	0.49	± 0.03	Inclination (i)	51°	± 2	Longitude of periastron (ω)	149°	± 6
Node (Ω)	178°	± 2	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation

label rho theta 2000 30.632 149.2 2001 30.697 149.4 2002 30.762 149.6 2003 30.826 149.8 2004 30.890 150.0 2005 30.953 150.1 2006 31.015 150.3 2007 31.078 150.5 2008 31.139 150.7 2009 31.200 150.8 2010 31.261 151.0 2011 31.321 151.2 2012 31.380 151.4 2013 31.439 151.5 2014 31.497 151.7 2015 31.555 151.9 2016 31.613 152.1 2017 31.669 152.2 2018 31.725 152.4 2019 31.781 152.6 2020 31.836 152.7 2021 31.890 152.9 2022 31.944 153.1 2023 31.998 153.2 2024 32.050 153.4 2025 32.103 153.6 2026 32.154 153.7 2027 32.205 153.9 2028 32.256 154.1 2029 32.306 154.2 2030 32.355 154.4 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

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