20347-6319 HU 1615

Coord 2000	20347-6319		Discov num	HU 1615		Comp			Coord arcsec 2000	20 34 44.16 -63 18 42.0
Date first	1914		Date last	2018		Obs	17
Pa first	359		Pa last	287		P.A. Now (θ)	284.8°
Sep first	0.4		Sep last	0.2		Sep. Now (ρ)	0.23"
Mag pri	8.07		Mag sec	8.21		delta mag (ΔM)	0.14		Spectral class	A3V (white)
Pri motion ra	+031		Sec motion ra
Pri motion dec	-006		Sec motion dec
Notes	O (Orbital solution)

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

Precise pa	287.4		Precise sep	0.199		Constellation	Pavo		SAO	254818
HIP	101543		Tycho2	9104-01084-1		Gaia DR2	82772505472		HD	195429
CP	CP-63 4590		Distance	183.82		Distance ly	599.62		last precise pa	287.4
last precise sep	0.199

Period (P)	357.17y		Periastron (T)	1999.08y		Semi-major axis (a)	0.387a
Eccentricity (e)	0.851		Inclination (i)	46°		Longitude of periastron (ω)	263°
Node (Ω)	257.5°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2014

label rho theta 2000 0.043 187.9 2001 0.053 212.7 2002 0.066 228.6 2003 0.080 239.0 2004 0.093 246.5 2005 0.105 252.1 2006 0.117 256.6 2007 0.127 260.3 2008 0.137 263.4 2009 0.147 266.2 2010 0.156 268.6 2011 0.165 270.7 2012 0.173 272.7 2013 0.181 274.4 2014 0.188 276.0 2015 0.195 277.5 2016 0.202 278.9 2017 0.209 280.2 2018 0.215 281.5 2019 0.221 282.6 2020 0.227 283.7 2021 0.233 284.8 2022 0.239 285.7 2023 0.244 286.7 2024 0.250 287.6 2025 0.255 288.5 2026 0.260 289.3 2027 0.265 290.1 2028 0.270 290.9 2029 0.275 291.6 2030 0.279 292.3 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
20347-6319	HU 1615		1991	13	66	0.1	8.07	8.21	A3V	O	203444.16-631842.0
20347-6319	HU 1615		2008	14	86	0.1	8.07	8.21	A3V	O	203444.16-631842.0
20347-6319	HU 1615		2010	15	86	0.2	8.07	8.21	A3V	O	203444.16-631842.0
20347-6319	HU 1615		2014	16	101	0.2	8.07	8.21	A3V	O	203444.16-631842.0
20347-6319	HU 1615		2018	17	287	0.2	8.07	8.21	A3V	O	203444.16-631842.0

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