09551-2632 I 843 AB (HD 85994)

Coord 2000	09551-2632		Discov num	I   843		Comp	AB		Coord arcsec 2000	09 55 06.30 -26 32 19.4
Date first	1910		Date last	2019		Obs	23
Pa first	200		Pa last	117.1		P.A. Now (θ)	117.1°
Sep first	1.0		Sep last	0.83		Sep. Now (ρ)	0.83"
Mag pri	8.98		Mag sec	9.68		delta mag (ΔM)	0.7		Spectral class	K1V (yellow-orange)
Pri motion ra	-149		Sec motion ra	-149
Pri motion dec	-042		Sec motion dec	-042
Notes	O (Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 85994		09 55 06 -26 32 19	I 843 AB	2019	23	117	0.8	8.98	9.68	0.70	Y	<===
Show			09 55 06 -26 32 19	I 843 AC	2015	10	221	6.2	8.98	12.70	3.72

Triple system
3 estimated visually detectable stars in this system

Name	HD 85994		Constellation	Hydra		HIP	48645		Tycho2	6612-01122-1
Gaia DR2	5658870380304596096		HD	85994		ADS	7580		CD	CD-25 7596

Period (P)	188.36y		Periastron (T)	1875.3y		Semi-major axis (a)	1.013a
Eccentricity (e)	0.591		Inclination (i)	130.7°		Longitude of periastron (ω)	232.5°
Node (Ω)	204.7°		Notes			Reference	Msn2017a
Equinox	2000		Last observation	2011		Grade	5	(1=Definitive, 9=Indet.)

label theta rho 2000 141.0 1.030 2001 140.1 1.019 2002 139.0 1.009 2003 138.0 0.999 2004 137.0 0.988 2005 135.9 0.978 2006 134.8 0.967 2007 133.7 0.957 2008 132.6 0.946 2009 131.4 0.936 2010 130.2 0.925 2011 129.0 0.914 2012 127.7 0.904 2013 126.5 0.893 2014 125.2 0.883 2015 123.8 0.873 2016 122.4 0.862 2017 121.0 0.852 2018 119.6 0.842 2019 118.1 0.832 2020 116.6 0.822 2021 115.1 0.812 2022 113.5 0.802 2023 111.9 0.792 2024 110.2 0.783 2025 108.5 0.773 2026 106.7 0.764 2027 105.0 0.755 2028 103.1 0.746 2029 101.2 0.737 2030 99.3 0.729		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic