00487+1841 BU 495 AB (HD 4655)

Coord 2000	00487+1841		Discov num	BU  495		Comp	AB		Coord arcsec 2000	00 48 44.81 +18 41 07.9
Date first	1878		Date last	2018		Obs	165
Pa first	231		Pa last	237.8		P.A. Now (θ)	232.2°
Sep first	0.6		Sep last	0.429		Sep. Now (ρ)	0.538"
Mag pri	8.34		Mag sec	8.61		delta mag (ΔM)	0.27		Spectral class	G0 (yellow)
Pri motion ra	-015		Sec motion ra
Pri motion dec	-051		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 4655	92095	00 48 45 +18 41 08	BU 495 AB	2018	165	238	0.4	8.34	8.61	0.27	Y	<===
Show		92095	00 48 45 +18 41 08	TOK 224 AC	2015	10	139	152.3	8.34	10.83	2.49
Show			00 48 52 +18 39 13	RAO 5 Ca,Cb	2013	2	321	0.7	10.83	12.00	1.17

Quadruple system
3 estimated visually detectable stars in this system

Name	HD 4655		Constellation	Pisces		SAO	92095		HIP	3795
Tycho2	1191-01284-1		HD	4655		ADS	673		BD	BD+17 105
Distance	64.1		Distance ly	209.09

Period (P)	143.628y	± 4	Periastron (T)	1979.856y	± 0.27	Semi-major axis (a)	0.617a	± 0.026
Eccentricity (e)	0.5	± 0.01	Inclination (i)	107.4°	± 4.6	Longitude of periastron (ω)	338.1°	± 12.4
Node (Ω)	31.3°	± 5.6	Notes	n		Reference	Sca2000b
Equinox	2000		Last observation	1998		Grade	2	(1=Definitive, 9=Indet.)

label theta rho 2000 309.0 0.168 2001 300.4 0.171 2002 292.2 0.177 2003 284.6 0.186 2004 277.9 0.198 2005 272.0 0.212 2006 266.9 0.227 2007 262.4 0.244 2008 258.5 0.261 2009 255.1 0.279 2010 252.1 0.298 2011 249.5 0.317 2012 247.2 0.336 2013 245.1 0.355 2014 243.2 0.374 2015 241.5 0.393 2016 240.0 0.412 2017 238.6 0.430 2018 237.3 0.449 2019 236.2 0.467 2020 235.1 0.485 2021 234.1 0.503 2022 233.1 0.521 2023 232.2 0.538 2024 231.4 0.555 2025 230.6 0.571 2026 229.9 0.587 2027 229.2 0.603 2028 228.5 0.618 2029 227.9 0.633 2030 227.3 0.648		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic