00210+6740 HJ 1018

Coord 2000	00210+6740		Discov num	HJ 1018		Comp			Coord arcsec 2000	00 20 57.23 +67 40 03.0
Date first	1828		Date last	2015		Obs	89
Pa first	84		Pa last	88		P.A. Now (θ)	87.8°
Sep first	1.5		Sep last	1.7		Sep. Now (ρ)	1.76"
Mag pri	8.57		Mag sec	8.89		delta mag (ΔM)	0.32		Spectral class	G5 (yellow)
Pri motion ra	+027		Sec motion ra	+027
Pri motion dec	+078		Sec motion dec	+078
Notes	N O (See Notes, Orbital solution)

This double is physical.

Precise pa	87.7		Precise sep	1.691		Constellation	Cepheus		SAO	11124
HIP	1674		Tycho2	4294-00406-1		Gaia DR2	8745379200		HD	1624
ADS	283		BD	BD+66 19		Distance	31.74		Distance ly	103.54
last precise pa	87.7		last precise sep	1.691

Period (P)	161y		Periastron (T)	1941y		Semi-major axis (a)	1a
Eccentricity (e)	0.89		Inclination (i)	88°		Longitude of periastron (ω)	202°
Node (Ω)	87°		Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label rho theta 2000 1.734 87.6 2001 1.739 87.6 2002 1.744 87.6 2003 1.748 87.6 2004 1.752 87.6 2005 1.756 87.6 2006 1.759 87.6 2007 1.761 87.6 2008 1.764 87.7 2009 1.765 87.7 2010 1.767 87.7 2011 1.768 87.7 2012 1.768 87.7 2013 1.768 87.7 2014 1.768 87.7 2015 1.767 87.7 2016 1.766 87.7 2017 1.764 87.8 2018 1.762 87.8 2019 1.760 87.8 2020 1.757 87.8 2021 1.754 87.8 2022 1.751 87.8 2023 1.747 87.8 2024 1.743 87.8 2025 1.738 87.8 2026 1.733 87.9 2027 1.727 87.9 2028 1.721 87.9 2029 1.715 87.9 2030 1.708 87.9 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
00210+6740	HJ 1018		2006	87	88	1.6	8.57	8.89	G5	NOD	002057.23+674003.0
00210+6740	HJ 1018		2009	88	89	1.8	8.57	8.89	G5	NOD	002057.23+674003.0
00210+6740	HJ 1018		2014	88	86	1.7	8.57	8.89	G5	NO	002057.23+674003.0
00210+6740	HJ 1018		2015	89	88	1.7	8.57	8.89	G5	NO	002057.23+674003.0

If you need more information about this double, apply for a data request form to the WDS.