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04180+1815
CIA 63 Aa,Ab

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

04180+1815 CIA 63 Aa,Ab (V1232 Tau)

04^h 18^m 01.84^s +18° 15' 24.5" P.A. 318.00 sep 0.0 mag 4.70,5.20 Sp G4V+G8V dist. 46.45 pc (151.52 l.y.)

Coord 2000	04180+1815		Discov num	CIA 63		Comp	Aa,Ab		Coord arcsec 2000	04 18 01.84 +18 15 24.5
Date first	2020		Date last	2022		Obs	10
Pa first	320		Pa last	318		P.A. Now (θ)	318°
Sep first	0.0		Sep last	0.007		Sep. Now (ρ)	0
Mag pri	4.70		Mag sec	5.20		delta mag (ΔM)	0.5		Spectral class	G4V+G8V (yellow/yellow)
Pri motion ra	+113		Sec motion ra
Pri motion dec	-031		Sec motion dec
Notes	N O W (See Notes, Orbital solution, )

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Var name	V1232 Tau		Constellation	Taurus		HIP	20056		Tycho2	1268-00327-1
HD	27149		BD	BD+17 703		Distance	46.45		Distance ly	151.52

ORBITAL ELEMENTS

Period (P)	75.658178d	± 0.000062	Periastron (T)	50160.429d (1996.21y)	± 0.012	Semi-major axis (a)	9.6594m	± 0.0023
Eccentricity (e)	0.2623	± 0.00012	Inclination (i)	85.869°	± 0.017	Longitude of periastron (ω)	358.317°	± 0.072
Node (Ω)	133.169°	± 0.018	Notes	n		Reference	CIA2024d
Equinox			Last observation			Grade	2	(1=Definitive, 9=Indet.)

label	theta	rho
2000-01-01	308.3	0.007
2001-01-01	144.0	0.003
2002-01-01	130.6	0.006
2003-01-01	323.7	0.004
2004-01-01	314.8	0.011
2005-01-01	312.0	0.012
2006-01-01	306.2	0.005
2007-01-01	138.4	0.005
2008-01-01	127.9	0.005
2009-01-01	319.7	0.006
2010-01-01	314.2	0.012
2011-01-01	311.3	0.011
2012-01-01	301.8	0.003
2013-01-01	135.8	0.006
2014-01-01	122.0	0.003
2015-01-01	317.7	0.007
2016-01-01	313.6	0.012
2017-01-01	310.6	0.010
2018-01-01	285.1	0.001
2019-01-01	133.9	0.007
2020-01-01	89.1	0.001
2021-01-01	316.4	0.009
2022-01-01	313.1	0.012
2023-01-01	309.6	0.009
2024-01-01	167.9	0.001
2025-01-01	132.3	0.007
2026-01-01	336.3	0.002
2027-01-01	315.5	0.010
2028-01-01	312.5	0.012
2029-01-01	308.3	0.007
2030-01-01	143.6	0.003
2031-01-01	130.5	0.006
2032-01-01	323.4	0.004
2033-01-01	314.8	0.011
2034-01-01	311.9	0.012
2035-01-01	306.1	0.005
2036-01-01	138.2	0.005
2037-01-01	127.7	0.005
2038-01-01	319.6	0.006
2039-01-01	314.2	0.012
2040-01-01	311.3	0.011
2041-01-01	301.5	0.003
2042-01-01	135.7	0.006
2043-01-01	121.5	0.003
2044-01-01	317.6	0.007
2045-01-01	313.6	0.012
2046-01-01	310.5	0.010
2047-01-01	283.1	0.001
2048-01-01	133.9	0.007
2049-01-01	84.2	0.001
2050-01-01	316.4	0.009

grafico orbita

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

wds04180%2B1815a.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic