02231+7021 MLR 377AB

Coord 2000	02231+7021		Discov num	MLR 377		Comp	AB		Coord arcsec 2000	02 23 04.70 +70 20 35.6
Date first	1972		Date last	2018		Obs	27
Pa first	162		Pa last	137		P.A. Now (θ)	134.3°
Sep first	0.5		Sep last	0.7		Sep. Now (ρ)	0.7"
Mag pri	8.42		Mag sec	8.70		delta mag (ΔM)	0.28		Spectral class	F5 (yellow-white)
Pri motion ra	+023		Sec motion ra	+023
Pri motion dec	-002		Sec motion dec	-002
Notes	N O (See Notes, Orbital solution)

Visually invisible, K-band or other infrared star This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		4635	02231+7021	MLR 377	AB	1972	2018	27	134	0.7	8.42	8.70	0.28	Y	<===
Show		4635	02231+7021	CVE 1	AB,C	1999	2014	6	43	66.3	7.91	13.92	6.01

Triple system
4 visible stars in this system

Precise pa	137		Precise sep	0.69		Constellation	Cassiopeia		SAO	4635
HIP	11120		Tycho2	4315-01749-1		Gaia DR2	8461252096		HD	14382
BD	BD+69 144		Distance	215.52		Distance ly	703.03		last precise pa	137
last precise sep	0.69

Period (P)	283.14y		Periastron (T)	1776.22y		Semi-major axis (a)	3.696a
Eccentricity (e)	0.982		Inclination (i)	94.2°		Longitude of periastron (ω)	89.3°
Node (Ω)	106°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2010

label rho theta 2000 0.662 144.5 2001 0.665 144.0 2002 0.668 143.5 2003 0.670 142.9 2004 0.673 142.4 2005 0.675 141.9 2006 0.678 141.3 2007 0.680 140.8 2008 0.683 140.3 2009 0.685 139.8 2010 0.687 139.3 2011 0.689 138.8 2012 0.691 138.3 2013 0.693 137.8 2014 0.695 137.3 2015 0.697 136.8 2016 0.699 136.3 2017 0.700 135.8 2018 0.702 135.3 2019 0.703 134.8 2020 0.704 134.3 2021 0.706 133.8 2022 0.707 133.4 2023 0.707 132.9 2024 0.708 132.4 2025 0.709 131.9 2026 0.709 131.4 2027 0.709 131.0 2028 0.709 130.5 2029 0.709 130.0 2030 0.709 129.5 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
02231+7021	MLR 377	AB	2005	21	142	0.7	8.42	8.70	F5	NOD	022304.70+702035.6
02231+7021	MLR 377	AB	2007	22	141	0.7	8.42	8.70	F5	NOD	022304.70+702035.6
02231+7021	MLR 377	AB	2010	23	140	0.7	8.42	8.70	F5	NOD	022304.70+702035.6
02231+7021	MLR 377	AB	2015	25	141	0.8	8.42	8.70	F5	NO	022304.70+702035.6
02231+7021	MLR 377	AB	2018	27	137	0.7	8.42	8.70	F5	NO	022304.70+702035.6

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