04024-2832 DAW  79

Coord 2000	04024-2832		Discov num	DAW  79		Comp			Coord arcsec 2000	04 02 21.85 -28 31 51.1
Date first	1920		Date last	2013		Obs	37
Pa first	132		Pa last	317		P.A. Now (θ)	130.4°
Sep first	0.6		Sep last	0.4		Sep. Now (ρ)	0.49"
Mag pri	8.28		Mag sec	8.71		delta mag (ΔM)	0.43		Spectral class	F8/G0V (yellow-white)
Pri motion ra	-029		Sec motion ra
Pri motion dec	-036		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Constellation	Eridanus		SAO	169052		HIP	18839		Tycho2	6461-01335-1
HD	25546		ADS	2952		CD	CD-28 1379		CP	CP-28 443
Distance	61.39		Distance ly	200.25		last precise pa	316.6		last precise sep	0.446

Period (P)	97.138y		Periastron (T)	1999.55y		Semi-major axis (a)	0.454a
Eccentricity (e)	0.703		Inclination (i)	130.3°		Longitude of periastron (ω)	249.8°
Node (Ω)	155.1°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2010

label rho theta 2000 0.089 255.6 2001 0.104 215.5 2002 0.141 191.3 2003 0.182 177.6 2004 0.220 168.9 2005 0.254 162.6 2006 0.285 157.7 2007 0.313 153.8 2008 0.338 150.5 2009 0.360 147.6 2010 0.380 145.0 2011 0.399 142.7 2012 0.416 140.6 2013 0.431 138.6 2014 0.445 136.8 2015 0.458 135.1 2016 0.470 133.5 2017 0.481 131.9 2018 0.491 130.4 2019 0.500 129.0 2020 0.508 127.6 2021 0.515 126.2 2022 0.522 124.9 2023 0.528 123.7 2024 0.534 122.4 2025 0.538 121.2 2026 0.543 120.0 2027 0.547 118.8 2028 0.550 117.6 2029 0.553 116.5 2030 0.555 115.3 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
04024-2832	DAW 79		1996	32	315	0.2	8.28	8.71	F8/G0V	NO	040221.85-283151.1
04024-2832	DAW 79		2008	33	329	0.4	8.28	8.71	F8/G0V	NO	040221.85-283151.1
04024-2832	DAW 79		2010	35	323	0.4	8.28	8.71	F8/G0V	NO	040221.85-283151.1
04024-2832	DAW 79		2011	36	323	0.4	8.28	8.71	F8/G0V	NO	040221.85-283151.1
04024-2832	DAW 79		2013	37	317	0.4	8.28	8.71	F8/G0V	NO	040221.85-283151.1

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