00487+1841 BU  495AB

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	163
Pa first	231		Pa last	238		P.A. Now (θ)	236.2°
Sep first	0.6		Sep last	0.4		Sep. Now (ρ)	0.47"
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_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			00487+1841	BU 495	AB	1878	2018	163	236	0.5	8.34	8.61	0.27	Y	<===
Show			00487+1841	TOK 224	AC	1895	2015	7	139	152.3	8.34	10.83	2.49
Show			00487+1841	RAO 5	Ca,Cb	2012	2013	2	321	0.7	10.83	12.00	1.17

Quadruple system
3 visible stars in this system

Precise pa	237.8		Precise sep	0.429		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		last precise pa	237.8
last precise sep	0.429

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	Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	1998

label rho theta 2000 0.168 309.0 2001 0.171 300.4 2002 0.177 292.2 2003 0.186 284.6 2004 0.198 277.9 2005 0.212 272.0 2006 0.227 266.9 2007 0.244 262.4 2008 0.261 258.5 2009 0.279 255.1 2010 0.298 252.1 2011 0.317 249.5 2012 0.336 247.2 2013 0.355 245.1 2014 0.374 243.2 2015 0.393 241.5 2016 0.412 240.0 2017 0.430 238.6 2018 0.449 237.3 2019 0.467 236.2 2020 0.485 235.1 2021 0.503 234.1 2022 0.521 233.1 2023 0.538 232.2 2024 0.555 231.4 2025 0.571 230.6 2026 0.587 229.9 2027 0.603 229.2 2028 0.618 228.5 2029 0.633 227.9 2030 0.648 227.3 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
00487+1841	BU 495	AB	2013	162	245	0.3	8.34	8.61	G0	NO	004844.81+184107.9

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