10281+4847 KUI  50

Coord 2000	10281+4847		Discov num	KUI  50		Comp			Coord arcsec 2000	10 28 03.88 +48 47 05.6
Date first	1939		Date last	2012		Obs	12
Pa first	15		Pa last	22		P.A. Now (θ)	22.8°
Sep first	4.5		Sep last	4.0		Sep. Now (ρ)	3.79"
Mag pri	6.40		Mag sec	12.60		delta mag (ΔM)	6.2		Spectral class	F9V (yellow-white)
Pri motion ra	+083		Sec motion ra	+083
Pri motion dec	-882		Sec motion dec	-882
Notes	O (Orbital solution)

This double is physical.

Precise pa	22		Precise sep	3.981		Cdsa2 id	KUI 50		Constellation	Ursa Major
SAO	43351		HIP	51248		Tycho2	3438-00194-1		HD	90508
HR	4098		GL	Gl 392A		BD	BD+49 1961		Ra deg	10.467744444444445
De deg	48.78488888888889		Distance	22.91		Distance ly	74.73		last precise pa	22
last precise sep	3.981

Period (P)	590y	± 208	Periastron (T)	1958.6y	± 16.8	Semi-major axis (a)	4.67a	± 0.12
Eccentricity (e)	0		Inclination (i)	81.4°	± 3.5	Longitude of periastron (ω)	0°
Node (Ω)	16.5°	± 1.9	Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox			Last observation	2012

label rho theta 2000 4.234 20.5 2001 4.213 20.6 2002 4.192 20.8 2003 4.170 20.9 2004 4.147 21.0 2005 4.125 21.1 2006 4.101 21.2 2007 4.078 21.3 2008 4.054 21.5 2009 4.029 21.6 2010 4.004 21.7 2011 3.979 21.8 2012 3.953 22.0 2013 3.927 22.1 2014 3.900 22.2 2015 3.873 22.3 2016 3.845 22.5 2017 3.817 22.6 2018 3.789 22.8 2019 3.760 22.9 2020 3.731 23.0 2021 3.701 23.2 2022 3.671 23.3 2023 3.641 23.5 2024 3.610 23.6 2025 3.579 23.8 2026 3.548 23.9 2027 3.516 24.1 2028 3.483 24.3 2029 3.451 24.4 2030 3.418 24.6 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
10281+4847	KUI 50		2006	11	21	3.6	6.44	7.38	F9V	O V	102803.88+484705.6
10281+4847	KUI 50		2012	12	22	4.0	6.44	7.38	F9V	O	102803.88+484705.6

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