20329+1142 J     1AB

Coord 2000	20329+1142		Discov num	J     1		Comp	AB		Coord arcsec 2000	20 32 52.76 +11 44 37.2
Date first	1909		Date last	2018		Obs	35
Pa first	38		Pa last	58		P.A. Now (θ)	55.5°
Sep first	0.9		Sep last	1.9		Sep. Now (ρ)	2.12"
Mag pri	10.04		Mag sec	10.57		delta mag (ΔM)	0.53		Spectral class
Pri motion ra	-054		Sec motion ra	-054
Pri motion dec	-021		Sec motion dec	-022
Notes	O (Orbital solution)

rPM=0.017 (< 0.3, Physical double) This double is physical.

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name

SAO

coord_2000

discov#

comp

first

last

obs

pa

sep

mag1

mag2

d_mag

orb

current

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20329+1142

J 1

AB

1909

2018

35

56

2.1

10.04

10.57

0.53

Y

<===

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20329+1142

UC 4212

AC

2000

2015

3

255

28.8

10.04

15.30

5.26

Triple system
3 visible stars in this system

Precise pa	58.2		Precise sep	1.913		Constellation	Delphinus		Tycho2	1095-00816-1
Gaia DR2	20997391744		ADS	13983		last precise pa	58.2		last precise sep	1.913

Period (P)	528.391y	± 34.998	Periastron (T)	2396.217y	± 5.49	Semi-major axis (a)	1.5446a	± 0.1719
Eccentricity (e)	0.745	± 0.1554	Inclination (i)	58.5°	± 3.4	Longitude of periastron (ω)	228.4°	± 10.4
Node (Ω)	38.8°	± 5.3	Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	1991

label rho theta 2000 2.046 53.0 2001 2.051 53.2 2002 2.055 53.3 2003 2.060 53.4 2004 2.064 53.6 2005 2.068 53.7 2006 2.073 53.8 2007 2.077 54.0 2008 2.081 54.1 2009 2.085 54.2 2010 2.088 54.4 2011 2.092 54.5 2012 2.096 54.6 2013 2.099 54.7 2014 2.103 54.9 2015 2.106 55.0 2016 2.110 55.1 2017 2.113 55.3 2018 2.116 55.4 2019 2.119 55.5 2020 2.122 55.6 2021 2.125 55.8 2022 2.128 55.9 2023 2.131 56.0 2024 2.134 56.1 2025 2.137 56.3 2026 2.139 56.4 2027 2.142 56.5 2028 2.144 56.6 2029 2.147 56.8 2030 2.149 56.9 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
20329+1142	J 1	AB	2010	32	57	2.0	10.04	10.57		O	203252.76+114437.2
20329+1142	J 1	AB	2015	33	57	2.1	10.04	10.57		O	203252.76+114437.2
20329+1142	J 1	AB	2018	35	58	1.9	10.04	10.57		O	203252.76+114437.2

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