02460-0457 BU   83

Coord 2000	02460-0457		Discov num	BU   83		Comp			Coord arcsec 2000	02 45 59.63 -04 57 23.2
Date first	1872		Date last	2015		Obs	66
Pa first	125		Pa last	13		P.A. Now (θ)	13°
Sep first	1.0		Sep last	1.0		Sep. Now (ρ)	1"
Mag pri	7.73		Mag sec	9.64		delta mag (ΔM)	1.91		Spectral class	F2 (yellow-white)
Pri motion ra	+050		Sec motion ra	+050
Pri motion dec	+002		Sec motion dec	+002
Notes	N O (See Notes, Orbital solution)

This double is physical.

Constellation	Eridanus		HIP	12912		Tycho2	4702-00556-1		HD	17251
ADS	2111		BD	BD-05 514		Distance	75.87		Distance ly	247.49
last precise pa	12.8		last precise sep	0.984

Period (P)	36y		Periastron (T)	1900.5y		Semi-major axis (a)	0.08a
Eccentricity (e)	0.15		Inclination (i)	50°		Longitude of periastron (ω)	280°
Node (Ω)	110°		Note			Grade	9	(1=Definitive, 9=Indet.)
Equinox	1900		Last observation	1968

label rho theta 2000 0.081 288.6 2001 0.078 295.0 2002 0.074 302.0 2003 0.069 309.9 2004 0.063 319.3 2005 0.056 330.9 2006 0.050 345.7 2007 0.045 4.0 2008 0.044 24.9 2009 0.046 45.2 2010 0.051 62.4 2011 0.058 76.1 2012 0.064 87.0 2013 0.070 96.0 2014 0.074 103.9 2015 0.077 111.1 2016 0.078 117.9 2017 0.077 124.7 2018 0.076 131.6 2019 0.073 138.9 2020 0.070 146.8 2021 0.067 155.4 2022 0.064 164.9 2023 0.061 175.3 2024 0.060 186.4 2025 0.059 198.1 2026 0.060 209.7 2027 0.061 220.8 2028 0.064 231.2 2029 0.068 240.5 2030 0.071 249.0 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

Period (P)	716.26y		Periastron (T)	2418.03y		Semi-major axis (a)	2.38a
Eccentricity (e)	0.51		Inclination (i)	101.4°		Longitude of periastron (ω)	290.2°
Node (Ω)	147.7°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2010

label rho theta 2000 0.869 20.0 2001 0.877 19.4 2002 0.885 18.7 2003 0.893 18.1 2004 0.901 17.5 2005 0.909 16.9 2006 0.917 16.4 2007 0.925 15.8 2008 0.933 15.2 2009 0.941 14.7 2010 0.950 14.1 2011 0.958 13.6 2012 0.967 13.1 2013 0.975 12.6 2014 0.984 12.1 2015 0.992 11.6 2016 1.001 11.1 2017 1.010 10.6 2018 1.019 10.1 2019 1.028 9.7 2020 1.036 9.2 2021 1.045 8.8 2022 1.054 8.3 2023 1.063 7.9 2024 1.072 7.5 2025 1.081 7.1 2026 1.091 6.6 2027 1.100 6.2 2028 1.109 5.8 2029 1.118 5.5 2030 1.127 5.1 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
02460-0457	BU 83		2007	56	16	0.9	7.73	9.64	F2	NOD	024559.63-045723.2
02460-0457	BU 83		2008	58	17	0.9	7.73	9.64	F2	NOD	024559.63-045723.2
02460-0457	BU 83		2010	59	14	1.0	7.73	9.64	F2	NOD	024559.63-045723.2
02460-0457	BU 83		2012	62	14	1.0	7.73	9.64	F2	NO	024559.63-045723.2
02460-0457	BU 83		2015	63	13	1.0	7.73	9.64	F2	NO	024559.63-045723.2

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