00576+5424 HLD   4

Coord 2000	00576+5424		Discov num	HLD   4		Comp			Coord arcsec 2000	00 57 35.79 +54 23 44.8
Date first	1881		Date last	2007		Obs	35
Pa first	125		Pa last	38		P.A. Now (θ)	53.5°
Sep first	1.0		Sep last	0.3		Sep. Now (ρ)	0.46"
Mag pri	9.00		Mag sec	9.50		delta mag (ΔM)	0.5		Spectral class	G0 (yellow)
Pri motion ra	+054		Sec motion ra
Pri motion dec	-014		Sec motion dec
Notes	O (Orbital solution)

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

Precise pa	38.3		Precise sep	0.307		Constellation	Cassiopeia		SAO	21874
Tycho2	3672-00063-1		Gaia DR2	8342363136		HD	5502		ADS	795
last precise pa	38.3		last precise sep	0.307

Period (P)	788.16y		Periastron (T)	1990.92y		Semi-major axis (a)	0.948a
Eccentricity (e)	0.892		Inclination (i)	13.3°		Longitude of periastron (ω)	191.7°
Node (Ω)	90.1°		Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation	1996

label rho theta 2000 0.201 16.0 2001 0.216 20.2 2002 0.230 23.8 2003 0.245 27.0 2004 0.259 29.9 2005 0.273 32.5 2006 0.287 34.8 2007 0.301 36.8 2008 0.314 38.8 2009 0.328 40.5 2010 0.341 42.1 2011 0.354 43.6 2012 0.366 45.0 2013 0.379 46.3 2014 0.391 47.5 2015 0.404 48.7 2016 0.416 49.8 2017 0.427 50.8 2018 0.439 51.7 2019 0.451 52.7 2020 0.462 53.5 2021 0.473 54.3 2022 0.484 55.1 2023 0.495 55.9 2024 0.506 56.6 2025 0.517 57.3 2026 0.528 58.0 2027 0.538 58.6 2028 0.548 59.2 2029 0.559 59.8 2030 0.569 60.4 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
00576+5424	HLD 4		1996	33	357	0.2	9.00	9.50	G0	O	005735.79+542344.8
00576+5424	HLD 4		2007	34	38	0.3	9.00	9.50	G0	O	005735.79+542344.8

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