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00521-1314
HU 201

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

00521-1314 HU 201

00^h 52^m 07.81^s -13° 13' 50.0" P.A. 123.10 sep 0.8 mag 10.09,10.47 Sp K1V dist. 60.94 pc (198.79 l.y.)

Coord 2000	00521-1314		Discov num	HU 201		Comp			Coord arcsec 2000	00 52 07.81 -13 13 50.0
Date first	1900		Date last	2018		Obs	48
Pa first	129		Pa last	122		P.A. Now (θ)	123.1°
Sep first	0.6		Sep last	0.8		Sep. Now (ρ)	0.83"
Mag pri	10.09		Mag sec	10.47		delta mag (ΔM)	0.38		Spectral class	K1V (yellow-orange)
Pri motion ra	+077		Sec motion ra	+077
Pri motion dec	-093		Sec motion dec	-093
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	122.1		Precise sep	0.847		Constellation	Cetus		SAO	147487
HIP	4066		Tycho2	5272-01666-1		Gaia DR2	2373200676375375104		HD	5041
ADS	713		BD	BD-14 152		Distance	60.94		Distance ly	198.79
last precise pa	122.1		last precise sep	0.847

ORBITAL ELEMENTS

Period (P)	128.9y		Periastron (T)	1932.97y		Semi-major axis (a)	0.542a
Eccentricity (e)	0.688		Inclination (i)	44.1°		Longitude of periastron (ω)	160°
Node (Ω)	124.6°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2008

label	rho	theta
2000	0.892	111.3
2001	0.893	111.9
2002	0.893	112.4
2003	0.893	113.0
2004	0.893	113.5
2005	0.892	114.0
2006	0.891	114.6
2007	0.889	115.1
2008	0.887	115.6
2009	0.885	116.2
2010	0.882	116.7
2011	0.879	117.3
2012	0.876	117.8
2013	0.872	118.4
2014	0.868	119.0
2015	0.863	119.5
2016	0.858	120.1
2017	0.852	120.7
2018	0.846	121.3
2019	0.840	121.9
2020	0.833	122.5
2021	0.826	123.1
2022	0.818	123.8
2023	0.810	124.4
2024	0.801	125.1
2025	0.792	125.7
2026	0.783	126.4
2027	0.772	127.1
2028	0.762	127.9
2029	0.751	128.6
2030	0.739	129.4

grafico orbita

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

wds00521-1314b.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00521-1314	HU 201		1994	45	108	0.9	10.09	10.47	K1V	NOD	005207.81-131350.0
00521-1314	HU 201		2008	46	116	0.9	10.09	10.47	K1V	NOD	005207.81-131350.0
00521-1314	HU 201		2015	47	120	0.8	10.09	10.47	K1V	O	005207.81-131350.0
00521-1314	HU 201		2018	48	122	0.8	10.09	10.47	K1V	O	005207.81-131350.0

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