20169+5017 ENG  73AB

Coord 2000	20169+5017		Discov num	ENG  73		Comp	AB		Coord arcsec 2000	20 16 54.53 +50 16 43.4
Date first	1892		Date last	2015		Obs	16
Pa first	96		Pa last	74		P.A. Now (θ)	74°
Sep first	54.5		Sep last	81.4		Sep. Now (ρ)	81.4"
Mag pri	8.24		Mag sec	10.30		delta mag (ΔM)	2.06		Spectral class	G5 (yellow)
Pri motion ra	-222		Sec motion ra	-022
Pri motion dec	-215		Sec motion dec	+004
Notes	N L W U (See Notes, Linear solution, , Proper motion indicates non-physical)

rPM=0.96 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		32429	20 16 55 +50 16 43	ENG 73 AB	2015	16	74	81.4	8.24	10.30	2.06	Y	<===
Show		32429	20 16 55 +50 16 43	ENG 73 AC	2003	10	158	92.7	8.24	11.00	2.76
Show		32429	20 16 55 +50 16 43	ENG 73 AD	2003	11	340	122.5	8.24	10.61	2.37
Show		32429	20 16 55 +50 16 43	ENG 73 AE	2003	11	118	162.5	8.24	12.30	4.06
Show		32429	20 16 55 +50 16 43	GIC 155 AF	2015	6	287	105.9	8.24	12.99	4.75
Show		32429	20 16 55 +50 16 43	MET 89 AH	2003	1	67	4.2	6.40	18.60	12.20
Show		32429	20 16 55 +50 16 43	MET 89 AI	2003	1	44	8.7	6.40	16.94	10.54
Show		32429	20 16 55 +50 16 43	MET 89 AJ	2004	1	326	11.3	6.40	18.49	12.09
Show		32429	20 16 55 +50 16 43	MET 89 AK	2003	1	232	11.7	6.40	18.41	12.01
Show		32429	20 17 02 +50 17 03	BUP 243 BG	2015	10	193	10.5	10.30	11.04	0.74
Show		32429	20 16 50 +50 18 38	BUP 243 DF	2015	15	216	105.9	10.61	12.99	2.38
Show		32429	20 16 44 +50 17 14	RAO 70 FL	2015	4	266	15.1	12.99	16.40	3.41

12-fold system
12 visible stars in this system

Precise pa	73.9		Precise sep	81.427		Constellation	Cygnus		SAO	32429
HIP	99965		Tycho2	3580-00583-1		Gaia DR2	2085008267746614912		HD	193216
BD	BD+49 3245		Distance	30.77		Distance ly	100.37		last precise pa	73.9
last precise sep	81.427

Period (P)	418.77d		Periastron (T)	50218d (1996.368y)		Semi-major axis (a)	3.7m	± 0.8
Eccentricity (e)	0.084		Inclination (i)	124.9°	± 12.1	Longitude of periastron (ω)	243°
Node (Ω)	174.1°	± 8.6	Note			Grade	9	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label rho theta 2000 0.003 206.4 2001 0.002 281.2 2002 0.003 338.6 2003 0.003 8.5 2004 0.003 49.2 2005 0.003 114.1 2006 0.004 154.1 2007 0.004 179.5 2008 0.003 215.1 2009 0.002 296.0 2010 0.003 344.4 2011 0.003 14.1 2012 0.002 59.8 2013 0.003 123.5 2014 0.004 158.9 2015 0.004 184.2 2016 0.002 225.7 2017 0.002 308.5 2018 0.003 349.8 2019 0.003 20.1 2020 0.002 71.4 2021 0.003 131.7 2022 0.004 163.5 2023 0.003 189.3 2024 0.002 238.7 2025 0.003 318.7 2026 0.004 354.9 2027 0.003 26.7 2028 0.002 83.6 2029 0.003 138.8 2030 0.004 167.9		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
20169+5017	ENG 73	AB	2004	13	76	78.2	8.24	10.30	G5	NLD	201654.53+501643.4
20169+5017	ENG 73	AB	2012	15	74	81.0	8.24	10.30	G5	NLD	201654.53+501643.4
20169+5017	ENG 73	AB	2015	16	74	81.4	8.24	10.30	G5	NL U	201654.53+501643.4

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