01108+6747 HDS 155

Coord 2000	01108+6747		Discov num	HDS 155		Comp			Coord arcsec 2000	01 10 50.74 +67 46 48.2
Date first	1991		Date last	2013		Obs	26
Pa first	165		Pa last	174		P.A. Now (θ)	150.4°
Sep first	0.1		Sep last	0.1		Sep. Now (ρ)	0.09"
Mag pri	7.22		Mag sec	7.68		delta mag (ΔM)	0.46		Spectral class	G0IV+G0IV (yellow/yellow)
Pri motion ra	+250		Sec motion ra
Pri motion dec	+024		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Precise pa	174		Precise sep	0.133		Constellation	Cassiopeia		SAO	11614
HIP	5531		Tycho2	4296-01443-1		Gaia DR2	6786294784		HD	6840
BD	BD+67 98		Distance	54.64		Distance ly	178.24		last precise pa	174
last precise sep	0.133

Period (P)	7.453y		Periastron (T)	1995.5y		Semi-major axis (a)	0.083a
Eccentricity (e)	0.744		Inclination (i)	52°		Longitude of periastron (ω)	215°
Node (Ω)	151.8°		Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2013

label rho theta 2000 0.118 182.0 2001 0.091 194.4 2002 0.052 222.5 2003 0.016 16.0 2004 0.086 148.8 2005 0.121 161.3 2006 0.132 169.7 2007 0.126 177.8 2008 0.105 188.0 2009 0.071 205.8 2010 0.031 270.6 2011 0.057 136.5 2012 0.109 156.6 2013 0.129 166.1 2014 0.130 174.0 2015 0.116 182.9 2016 0.088 196.0 2017 0.048 227.7 2018 0.017 68.3 2019 0.091 150.4 2020 0.123 162.2 2021 0.132 170.4 2022 0.124 178.6 2023 0.103 189.2 2024 0.067 208.5 2025 0.029 284.9 2026 0.064 140.0 2027 0.112 157.7 2028 0.130 166.8 2029 0.129 174.8 2030 0.114 183.9 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
01108+6747	HDS 155		2007	11	184	0.1	7.22	7.68	G0	D	011050.36+674648.1
01108+6747	HDS 155		2008	20	199	0.1	7.22	7.68	G0IV G0IV	D	011050.36+674648.1
01108+6747	HDS 155		2009	21	243	0.0	7.22	7.68	G0IV G0IV	D	011050.36+674648.1
01108+6747	HDS 155		2012	22	165	0.1	7.22	7.68	G0IV G0IV	NOD	011050.36+674648.1
01108+6747	HDS 155		2013	26	174	0.1	7.22	7.68	G0IV+G0IV	NO	011050.74+674648.2

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