06003-3102 HU 1399 AB

Coord 2000	06003-3102		Discov num	HU 1399		Comp	AB		Coord arcsec 2000	06 00 19.69 -31 01 54.0
Date first	1911		Date last	2021		Obs	76
Pa first	340		Pa last	76.9		P.A. Now (θ)	76.3°
Sep first	0.8		Sep last	0.348		Sep. Now (ρ)	0.34"
Mag pri	8.94		Mag sec	10.19		delta mag (ΔM)	1.25		Spectral class	K3/4V (yellow-orange)
Pri motion ra	-465		Sec motion ra
Pri motion dec	+405		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			06 00 20 -31 01 54	HU 1399 AB	2021	76	77	0.3	8.94	10.19	1.25	Y	<===
Show	HD 40887		06 00 20 -31 01 54	HJ 3823 AC	2016	75	2	2.9	8.94	8.67	0.27	Y
Show			06 00 20 -31 01 54	B 2595 AD	2015	20	145	39.7	8.94	12.80	3.86
Show			06 00 20 -31 01 54	TOK 9 CE	2021	25	161	0.2	8.67	13.13	4.46	Y

Quintuple system
5 estimated visually detectable stars in this system

Constellation	Columba		HIP	28442		Tycho2	7071-02045-1		HD	40887
GL	Gl 225.2A		CD	CD-31 2902		CP	CP-31 976		Distance	16.39
Distance ly	53.46

Period (P)	67.45y	± 0.14	Periastron (T)	1997.85y	± 0.17	Semi-major axis (a)	0.946a	± 0.01
Eccentricity (e)	0.516	± 0.013	Inclination (i)	101.2°	± 0.4	Longitude of periastron (ω)	278.5°	± 0.5
Node (Ω)	126.7°	± 0.5	Notes	n		Reference	Tok2014a
Equinox	2000		Last observation	2013		Grade	3	(1=Definitive, 9=Indet.)

label theta rho 2000 136.6 0.376 2001 132.2 0.482 2002 129.3 0.568 2003 127.1 0.633 2004 125.3 0.681 2005 123.7 0.714 2006 122.1 0.735 2007 120.7 0.745 2008 119.3 0.746 2009 117.8 0.740 2010 116.4 0.728 2011 114.8 0.711 2012 113.2 0.690 2013 111.5 0.665 2014 109.6 0.636 2015 107.5 0.606 2016 105.3 0.574 2017 102.7 0.540 2018 99.8 0.505 2019 96.4 0.470 2020 92.5 0.435 2021 88.0 0.401 2022 82.6 0.369 2023 76.3 0.340 2024 68.8 0.314 2025 60.2 0.294 2026 50.5 0.281 2027 40.2 0.275 2028 29.8 0.278 2029 19.9 0.289 2030 10.9 0.308		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic