20248-1943 HDS2919

Coord 2000	20248-1943		Discov num	HDS2919		Comp			Coord arcsec 2000	20 24 46.66 -19 42 35.9
Date first	1991		Date last	2019		Obs	11
Pa first	66		Pa last	215		P.A. Now (θ)	224.6°
Sep first	0.4		Sep last	0.1		Sep. Now (ρ)	0.11"
Mag pri	9.93		Mag sec	10.72		delta mag (ΔM)	0.79		Spectral class	K3V (yellow-orange)
Pri motion ra	+043		Sec motion ra
Pri motion dec	-011		Sec motion dec
Notes	O (Orbital solution)

Visually invisible, K-band or other infrared star This double is physical.

Precise pa	214.9		Precise sep	0.092		Constellation	Capricornus		SAO	163540
HIP	100685		Tycho2	6337-01640-1		Gaia DR2	29861972096		HD	194169
BD	BD-20 5925		Distance	54.53		Distance ly	177.88		last precise pa	214.9
last precise sep	0.092

Period (P)	65y		Periastron (T)	2020.9y	± 0.75	Semi-major axis (a)	0.3243a	± 0.0086
Eccentricity (e)	0.474	± 0.062	Inclination (i)	60.9°	± 2.5	Longitude of periastron (ω)	311.6°	± 3.6
Node (Ω)	269.7°	± 2.9	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label rho theta 2000 0.412 79.3 2001 0.409 80.8 2002 0.405 82.3 2003 0.399 83.9 2004 0.392 85.5 2005 0.383 87.1 2006 0.372 88.9 2007 0.360 90.7 2008 0.345 92.7 2009 0.328 94.9 2010 0.309 97.4 2011 0.287 100.2 2012 0.263 103.5 2013 0.236 107.5 2014 0.207 112.6 2015 0.176 119.4 2016 0.144 129.2 2017 0.115 144.3 2018 0.094 167.9 2019 0.091 198.2 2020 0.107 224.6 2021 0.132 242.5 2022 0.157 254.5 2023 0.178 263.3 2024 0.193 270.6 2025 0.202 277.0 2026 0.206 282.9 2027 0.206 288.8 2028 0.204 294.7 2029 0.200 300.8 2030 0.195 307.2 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
20248-1943	HDS2919		1997	3	79	0.4	9.93	10.72	K3V	D	202446.66-194235.9
20248-1943	HDS2919		2007	4	92	0.3	9.93	10.72	K3V	D	202446.66-194235.9
20248-1943	HDS2919		2013	6	111	0.2	9.93	10.72	K3V		202446.66-194235.9
20248-1943	HDS2919		2014	7	119	0.2	9.93	10.72	K3V		202446.66-194235.9
20248-1943	HDS2919		2015	8	125	0.2	9.93	10.72	K3V		202446.66-194235.9
20248-1943	HDS2919		2017	9	155	0.1	9.93	10.72	K3V	O	202446.66-194235.9
20248-1943	HDS2919		2018	10	179	0.1	9.93	10.72	K3V	O	202446.66-194235.9
20248-1943	HDS2919		2019	11	215	0.1	9.93	10.72	K3V	O	202446.66-194235.9

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