20289-1749 SHJ 323AB (Rho Cap)

Coord 2000	20289-1749		Discov num	SHJ 323		Comp	AB		Coord arcsec 2000	20 28 51.62 -17 48 49.2
Date first	1823		Date last	2018		Obs	76
Pa first	177		Pa last	190		P.A. Now (θ)	187.9°
Sep first	4.0		Sep last	1.7		Sep. Now (ρ)	1.86"
Mag pri	4.97		Mag sec	6.88		delta mag (ΔM)	1.91		Spectral class	F3V (yellow-white)
Pri motion ra	-003		Sec motion ra	-003
Pri motion dec	-017		Sec motion dec	-017
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Rho Cap	163614	20289-1749	SHJ 323	AB	1823	2018	76	188	1.9	4.97	6.88	1.91	Y	<===
Show			20289-1749	BU 61	AC	1871	2015	11	149	53.5	4.97	13.30	8.33
Show			20289-1749	SHJ 323	AD	1800	2011	28	150	258.7	4.97	6.68	1.71
Show			20289-1749	BU 61	BC	1898	2015	5	149	53.5	6.88	12.50	5.62
Show			20289-1749	DOB 13	DE	1913	1999	5	96	54.3	6.67	10.60	3.93

Quintuple system
5 visible stars in this system

Precise pa	189.6		Precise sep	1.684		Name	Rho Cap		Constellation	Capricornus
SAO	163614		HIP	101027		Tycho2	6333-02128-1		Gaia DR2	74279114880
HD	194943		HR	7822		GC	28481		ADS	13887
GL	Gl 791.1A		BD	BD-18 5689		Bayer	Rho Capricorni		Bayer name	Rho Cap
Flamsteed	11 Capricorni		Flamsteed name	11 Cap		Distance	30.27		Distance ly	98.74
last precise pa	189.6		last precise sep	1.684

Period (P)	278y		Periastron (T)	1965y		Semi-major axis (a)	1.877a
Eccentricity (e)	0.91		Inclination (i)	113.3°		Longitude of periastron (ω)	144.5°
Node (Ω)	162°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	1985

label rho theta 2000 1.326 193.6 2001 1.357 193.1 2002 1.388 192.7 2003 1.419 192.4 2004 1.449 192.0 2005 1.478 191.7 2006 1.508 191.3 2007 1.536 191.0 2008 1.565 190.7 2009 1.593 190.4 2010 1.621 190.1 2011 1.648 189.8 2012 1.675 189.5 2013 1.702 189.3 2014 1.729 189.0 2015 1.755 188.8 2016 1.780 188.5 2017 1.806 188.3 2018 1.831 188.1 2019 1.855 187.9 2020 1.880 187.6 2021 1.904 187.4 2022 1.928 187.2 2023 1.951 187.0 2024 1.975 186.8 2025 1.998 186.6 2026 2.020 186.5 2027 2.043 186.3 2028 2.065 186.1 2029 2.086 185.9 2030 2.108 185.8 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
20289-1749	SHJ 323	AB	2004	65	194	1.3	4.97	6.88	F3V	NOD	202851.62-174849.2
20289-1749	SHJ 323	AB	2009	66	215	1.4	4.97	6.88	F3V	NOD	202851.62-174849.2
20289-1749	SHJ 323	AB	2013	71	191	1.6	4.97	6.88	F3V	NO	202851.62-174849.2
20289-1749	SHJ 323	AB	2016	71	194	1.5	4.97	6.88	F3V	NO	202851.62-174849.2
20289-1749	SHJ 323	AB	2018	74	190	1.7	4.97	6.88	F3V	NO	202851.62-174849.2

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