00093+7943 STF   2

Coord 2000	00093+7943		Discov num	STF   2		Comp			Coord arcsec 2000	00 09 20.18 +79 42 52.4
Date first	1828		Date last	2019		Obs	212
Pa first	343		Pa last	15		P.A. Now (θ)	14.3°
Sep first	0.8		Sep last	0.9		Sep. Now (ρ)	0.95"
Mag pri	6.68		Mag sec	6.89		delta mag (ΔM)	0.21		Spectral class	A4IV (white)
Pri motion ra	+106		Sec motion ra	+106
Pri motion dec	-033		Sec motion dec	-033
Notes	N O (See Notes, Orbital solution)

This double is physical.

Precise pa	14.6		Precise sep	0.94		Constellation	Cepheus		SAO	4048
HIP	760		Tycho2	4500-01334-1		Gaia DR2	7238715264		HD	431
HR	20		ADS	102		BD	BD+78 1		Distance	105.49
Distance ly	344.11		last precise pa	14.6		last precise sep	0.94

Period (P)	540y		Periastron (T)	1887.5y		Semi-major axis (a)	0.995a
Eccentricity (e)	0.715		Inclination (i)	110.1°		Longitude of periastron (ω)	333.7°
Node (Ω)	171.2°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label rho theta 2000 0.788 18.7 2001 0.796 18.5 2002 0.804 18.2 2003 0.812 18.0 2004 0.819 17.8 2005 0.827 17.5 2006 0.835 17.3 2007 0.842 17.1 2008 0.850 16.9 2009 0.857 16.6 2010 0.865 16.4 2011 0.872 16.2 2012 0.880 16.0 2013 0.887 15.8 2014 0.895 15.6 2015 0.902 15.4 2016 0.909 15.2 2017 0.916 15.0 2018 0.924 14.8 2019 0.931 14.7 2020 0.938 14.5 2021 0.945 14.3 2022 0.952 14.1 2023 0.959 13.9 2024 0.966 13.8 2025 0.973 13.6 2026 0.980 13.4 2027 0.987 13.3 2028 0.993 13.1 2029 1.000 13.0 2030 1.007 12.8 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
00093+7943	STF 2		2005	214	18	0.8	6.68	6.89	A4IV	NOD	000920.18+794252.4
00093+7943	STF 2		2007	215	18	0.8	6.68	6.89	A4IV	NOD	000920.18+794252.4
00093+7943	STF 2		2010	216	17	0.8	6.68	6.89	A4IV	NOD	000920.18+794252.4
00093+7943	STF 2		2012	208	17	0.9	6.68	6.89	A4IV	NOD	000920.18+794252.4
00093+7943	STF 2		2015	210	17	0.9	6.68	6.89	A4IV	NO	000920.18+794252.4
00093+7943	STF 2		2018	211	17	0.9	6.68	6.89	A4IV	NO	000920.18+794252.4
00093+7943	STF 2		2019	212	15	0.9	6.68	6.89	A4IV	NO	000920.18+794252.4

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