02087-1005 HU   16

Coord 2000	02087-1005		Discov num	HU   16		Comp			Coord arcsec 2000	02 08 42.29 -10 05 18.9
Date first	1899		Date last	2017		Obs	21
Pa first	329		Pa last	35		P.A. Now (θ)	36.8°
Sep first	1.1		Sep last	0.9		Sep. Now (ρ)	0.89"
Mag pri	9.30		Mag sec	10.53		delta mag (ΔM)	1.23		Spectral class	G5 (yellow)
Pri motion ra	+152		Sec motion ra	+152
Pri motion dec	-016		Sec motion dec	-016
Notes	N O (See Notes, Orbital solution)

This double is physical.

Precise pa	35.4		Precise sep	0.892		Constellation	Cetus		Tycho2	5281-02156-1
Gaia DR2	67939946112		HD	13191		ADS	1674		last precise pa	35.4
last precise sep	0.892

Period (P)	485y		Periastron (T)	1929.62y		Semi-major axis (a)	1.173a
Eccentricity (e)	0		Inclination (i)	45.4°		Longitude of periastron (ω)	0°
Node (Ω)	338.8°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2013

label rho theta 2000 0.969 21.0 2001 0.965 21.8 2002 0.960 22.5 2003 0.956 23.3 2004 0.952 24.1 2005 0.947 24.9 2006 0.943 25.7 2007 0.938 26.5 2008 0.934 27.3 2009 0.930 28.2 2010 0.925 29.0 2011 0.921 29.8 2012 0.917 30.7 2013 0.913 31.5 2014 0.909 32.4 2015 0.905 33.3 2016 0.901 34.2 2017 0.897 35.0 2018 0.893 35.9 2019 0.889 36.8 2020 0.885 37.8 2021 0.882 38.7 2022 0.878 39.6 2023 0.875 40.5 2024 0.872 41.5 2025 0.868 42.4 2026 0.865 43.4 2027 0.862 44.3 2028 0.859 45.3 2029 0.856 46.3 2030 0.853 47.3 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
02087-1005	HU 16		1997	18	29	1.1	9.30	10.53	G5	O	020842.29-100518.9
02087-1005	HU 16		2008	19	28	0.9	9.30	10.53	G5	O	020842.29-100518.9
02087-1005	HU 16		2013	20	32	0.9	9.30	10.53	G5	O	020842.29-100518.9
02087-1005	HU 16		2017	21	35	0.9	9.30	10.53	G5	O	020842.29-100518.9

If you need more information about this double, apply for a data request form to the WDS.