00542+4318 COU1654

Coord 2000	00542+4318		Discov num	COU1654		Comp			Coord arcsec 2000	00 54 11.08 +43 17 54.1
Date first	1978		Date last	2008		Obs	21
Pa first	107		Pa last	90		P.A. Now (θ)	265.8°
Sep first	0.2		Sep last	0.4		Sep. Now (ρ)	0.1"
Mag pri	8.40		Mag sec	8.40		delta mag (ΔM)	0		Spectral class	F0 (yellow-white)
Pri motion ra	+012		Sec motion ra
Pri motion dec	-014		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

Constellation	Andromeda		SAO	36758		Tycho2	2810-00453-1		HD	5178
last precise pa	90.3		last precise sep	0.413

Period (P)	93y		Periastron (T)	1918y		Semi-major axis (a)	0.15a
Eccentricity (e)	0.564		Inclination (i)	109.7°		Longitude of periastron (ω)	110°
Node (Ω)	91.5°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	1995

label rho theta 2000 0.126 91.3 2001 0.119 89.7 2002 0.111 87.9 2003 0.102 85.8 2004 0.092 83.2 2005 0.080 79.9 2006 0.068 75.4 2007 0.054 68.8 2008 0.040 57.4 2009 0.027 34.5 2010 0.023 351.6 2011 0.030 314.3 2012 0.044 295.9 2013 0.057 286.1 2014 0.068 279.8 2015 0.078 275.3 2016 0.085 271.7 2017 0.091 268.6 2018 0.095 265.8 2019 0.098 263.2 2020 0.100 260.7 2021 0.101 258.3 2022 0.101 255.9 2023 0.100 253.6 2024 0.099 251.1 2025 0.098 248.6 2026 0.096 246.1 2027 0.095 243.4 2028 0.092 240.7 2029 0.090 237.8 2030 0.088 234.7 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
00542+4318	COU1654		1995	19	98	0.1	8.40	8.40	F0	O	005411.08+431754.1
00542+4318	COU1654		2007	20	66	0.1	8.40	8.40	F0	O	005411.08+431754.1
00542+4318	COU1654		2008	21	90	0.4	8.40	8.40	F0	O	005411.08+431754.1

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