20329+1357 L    35CD

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	2016		Obs	61
Pa first	143		Pa last	143		P.A. Now (θ)	133.8°
Sep first	0.3		Sep last	0.6		Sep. Now (ρ)	0.5"
Mag pri	10.60		Mag sec	10.92		delta mag (ΔM)	0.32		Spectral class	K0 (yellow-orange)
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		106221	20 32 55 +13 56 40	BU 670 AB	2016	92	5	0.8	9.44	9.87	0.43
Show		106221	20 32 55 +13 56 40	A 3108 AB,CD	2016	20	340	98.4	9.12	10.02	0.90
Show		106221	20 32 53 +13 58 09	L 35 CD	2016	61	134	0.5	10.60	10.92	0.32	Y	<===

Quadruple system
6 visible stars in this system

Precise pa	142.5		Precise sep	0.6		Constellation	Delphinus		SAO	106221
HIP	101390		Tycho2	1099-01004-1		Gaia DR2	1804320884949038976		ADS	13987
BD	BD+13 4434		Distance	72.78		Distance ly	237.41		last precise pa	142.5
last precise sep	0.6

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°		Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2009

label rho theta 2000 0.414 186.6 2001 0.419 183.6 2002 0.424 180.6 2003 0.428 177.7 2004 0.433 174.9 2005 0.438 172.1 2006 0.442 169.4 2007 0.447 166.7 2008 0.451 164.1 2009 0.456 161.5 2010 0.460 159.0 2011 0.464 156.6 2012 0.468 154.1 2013 0.472 151.7 2014 0.475 149.4 2015 0.479 147.1 2016 0.482 144.8 2017 0.485 142.5 2018 0.488 140.3 2019 0.491 138.1 2020 0.494 135.9 2021 0.496 133.8 2022 0.499 131.7 2023 0.501 129.6 2024 0.502 127.5 2025 0.504 125.4 2026 0.506 123.3 2027 0.507 121.3 2028 0.508 119.2 2029 0.509 117.2 2030 0.509 115.1		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+1357	L 35	CD	1994	56	208	0.3	10.60	10.92	K0	NOD	203253.06+135809.1
20329+1357	L 35	CD	2007	57	164	0.5	10.60	10.92	K0	NOD	203253.06+135809.1
20329+1357	L 35	CD	2009	58	160	0.5	10.60	10.92	K0	NOD	203253.06+135809.1
20329+1357	L 35	CD	2016	59	143	0.6	10.60	10.92	K0	NO	203253.06+135809.1

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