20330+4950 MCA  61AB

Coord 2000	20330+4950		Discov num	MCA  61		Comp	AB		Coord arcsec 2000	20 32 59.04 +49 50 28.3
Date first	1980		Date last	2006		Obs	13
Pa first	68		Pa last	233		P.A. Now (θ)	253°
Sep first	0.1		Sep last	0.1		Sep. Now (ρ)	0.13"
Mag pri	6.70		Mag sec			delta mag (ΔM)			Spectral class	A0+G (white/yellow)
Pri motion ra	-002		Sec motion ra
Pri motion dec	+005		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

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name

SAO

coord

wds_name

last

obs

pa

sep

mag1

mag2

d_mag

orb

current

Show

49782

20 32 59 +49 50 28

MCA 61 AB

2006

13

253

0.1

6.70

Y

<===

Show

49782

20 32 59 +49 50 28

RBR 49 AC

2004

2

136

4.3

6.70

15.00

8.30

Triple system
3 visible stars in this system

Precise pa	232.8		Precise sep	0.108		Constellation	Cygnus		SAO	49782
HIP	101398		Tycho2	3581-01342-1		Gaia DR2	2180169006262367104		HD	196088
BD	BD+49 3310		Distance	458.72		Distance ly	1496.34		last precise pa	232.8
last precise sep	0.108

Period (P)	184.75y	± 33.29	Periastron (T)	1986.09y	± 0.66	Semi-major axis (a)	0.133a	± 0.016
Eccentricity (e)	0.612	± 0.045	Inclination (i)	46°	± 3.8	Longitude of periastron (ω)	266.7°	± 4.8
Node (Ω)	219.5°	± 4.5	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation	2006

label rho theta 2000 0.088 220.6 2001 0.091 223.0 2002 0.094 225.2 2003 0.097 227.3 2004 0.100 229.2 2005 0.103 231.1 2006 0.105 232.8 2007 0.108 234.5 2008 0.110 236.1 2009 0.112 237.6 2010 0.114 239.1 2011 0.116 240.6 2012 0.118 241.9 2013 0.119 243.3 2014 0.121 244.6 2015 0.123 245.9 2016 0.124 247.1 2017 0.126 248.3 2018 0.127 249.5 2019 0.128 250.7 2020 0.129 251.8 2021 0.131 253.0 2022 0.132 254.1 2023 0.133 255.1 2024 0.134 256.2 2025 0.135 257.3 2026 0.136 258.3 2027 0.136 259.3 2028 0.137 260.3 2029 0.138 261.3 2030 0.139 262.3		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
20330+4950	MCA 61	AB	2006	13	233	0.1	6.70		A0+G	O	203259.04+495028.3

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