20329+1357 L 35 CD

Coord 2000	20329+1357		Discov num	L    35		Comp	CD		Coord arcsec 2000	20 32 53.06 +13 58 09.1
Date first	1900		Date last	2021		Obs	65
Pa first	143		Pa last	129.9		P.A. Now (θ)	129.6°
Sep first	0.3		Sep last	0.521		Sep. Now (ρ)	0.501"
Mag pri	10.60		Mag sec	10.92		delta mag (ΔM)	0.32		Spectral class	K3.6V+G9V (yellow-orange/yellow)
Pri motion ra	-077		Sec motion ra
Pri motion dec	+141		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 32 55 +13 56 40	BU 670 AB	2016	92	5	0.8	9.44	9.87	0.43
Show			20 32 55 +13 56 40	A 3108 AB,CD	2016	20	340	98.4	9.12	10.02	0.90
Show			20 32 53 +13 58 09	L 35 CD	2021	65	130	0.5	10.60	10.92	0.32	Y	<===

Quadruple system
6 estimated visually detectable stars in this system

Constellation	Delphinus		HIP	101390		Tycho2	1099-01004-1		Gaia DR2	1804320884949038976
ADS	13987		BD	BD+13 4434		Distance	72.78		Distance ly	237.41

Period (P)	117.92y		Periastron (T)	1974.32y		Semi-major axis (a)	0.426a
Eccentricity (e)	0.198		Inclination (i)	166°		Longitude of periastron (ω)	6.6°
Node (Ω)	294.9°		Notes	n		Reference	Hrt2014b
Equinox	2000		Last observation	2009		Grade	2	(1=Definitive, 9=Indet.)

label theta rho 2000 186.6 0.414 2001 183.6 0.419 2002 180.6 0.424 2003 177.7 0.428 2004 174.9 0.433 2005 172.1 0.438 2006 169.4 0.442 2007 166.7 0.447 2008 164.1 0.451 2009 161.5 0.456 2010 159.0 0.460 2011 156.6 0.464 2012 154.1 0.468 2013 151.7 0.472 2014 149.4 0.475 2015 147.1 0.479 2016 144.8 0.482 2017 142.5 0.485 2018 140.3 0.488 2019 138.1 0.491 2020 135.9 0.494 2021 133.8 0.496 2022 131.7 0.499 2023 129.6 0.501 2024 127.5 0.502 2025 125.4 0.504 2026 123.3 0.506 2027 121.3 0.507 2028 119.2 0.508 2029 117.2 0.509 2030 115.1 0.509		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic