03566+5042 CIA 16 Aa,Ab

Coord 2000	03566+5042		Discov num	CIA  16		Comp	Aa,Ab		Coord arcsec 2000	03 56 36.52 +50 41 43.4
Date first	2017		Date last	2019		Obs	9
Pa first	200		Pa last	146.1		P.A. Now (θ)	146.1°
Sep first	0.0		Sep last	0.009		Sep. Now (ρ)	0.009"
Mag pri	5.00		Mag sec	5.10		delta mag (ΔM)	0.1		Spectral class	F5V (yellow-white)
Pri motion ra	+092		Sec motion ra
Pri motion dec	-130		Sec motion dec
Notes	N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)

Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		24314	03 56 37 +50 41 43	CIA 16 Aa,Ab	2019	9	146	0.0	5.00	5.10	0.10	Y	<===
Show	43 Per	24314	03 56 37 +50 41 43	S 440 AB	2016	23	31	75.3	5.32	10.66	5.34
Show		24314	03 56 37 +50 41 43	S 440 AC	2012	7	132	85.6	5.32	12.18	6.86
Show		24314	03 56 37 +50 41 43	S 440 AD	2014	8	291	67.7	5.32	13.43	8.11

Quintuple system
4 estimated visually detectable stars in this system

Constellation	Perseus		SAO	24314		HIP	18453		Tycho2	3339-01703-1
HD	24546		HR	1210		GC	4728		BD	BD+50 860
Flamsteed	43 Persei		Flamsteed name	43 Per		Distance	37.44		Distance ly	122.13

Period (P)	30.43885d	± 0.00002	Periastron (T)	57340.551d (2015.869y)	± 0.003	Semi-major axis (a)	6.99m	± 0.06
Eccentricity (e)	0.6421	± 0.0006	Inclination (i)	56.76°	± 0.45	Longitude of periastron (ω)	27.71°	± 0.11
Node (Ω)	150.2°	± 0.3	Notes	n		Reference	CIA2020a
Equinox			Last observation			Grade	2	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 352.3 0.010 2001-01-01 352.2 0.010 2002-01-01 352.1 0.010 2003-01-01 352.1 0.010 2004-01-01 352.0 0.010 2005-01-01 352.0 0.010 2006-01-01 351.9 0.010 2007-01-01 351.8 0.010 2008-01-01 351.8 0.010 2009-01-01 351.7 0.010 2010-01-01 351.7 0.010 2011-01-01 351.6 0.010 2012-01-01 351.5 0.010 2013-01-01 351.5 0.010 2014-01-01 351.4 0.010 2015-01-01 351.4 0.010 2016-01-01 351.3 0.010 2017-01-01 351.2 0.010 2018-01-01 351.2 0.010 2019-01-01 351.1 0.010 2020-01-01 351.1 0.010 2021-01-01 351.0 0.010 2022-01-01 350.9 0.010 2023-01-01 350.9 0.010 2024-01-01 350.8 0.010 2025-01-01 350.8 0.010 2026-01-01 350.7 0.010 2027-01-01 350.7 0.010 2028-01-01 350.6 0.010 2029-01-01 350.5 0.010 2030-01-01 350.5 0.010		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic