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00428+1249
HDS 93

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

00428+1249 HDS 93

00^h 42^m 47.92^s +12° 48' 41.8" P.A. 13.30 sep 0.3 mag 10.78,12.02 dist. 75.64 pc (246.74 l.y.)

Coord 2000	00428+1249		Discov num	HDS 93		Comp			Coord arcsec 2000	00 42 47.92 +12 48 41.8
Date first	1991		Date last	2019		Obs	14
Pa first	160		Pa last	18		P.A. Now (θ)	13.3°
Sep first	0.2		Sep last	0.3		Sep. Now (ρ)	0.31"
Mag pri	10.78		Mag sec	12.02		delta mag (ΔM)	1.24		Spectral class
Pri motion ra	+193		Sec motion ra
Pri motion dec	-077		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	18.3		Precise sep	0.315		Constellation	Pisces		HIP	3361
Tycho2	0610-00266-1		BD	BD+12 81		Distance	75.64		Distance ly	246.74
last precise pa	18.3		last precise sep	0.315

ORBITAL ELEMENTS

Period (P)	88.72y	± 0.505	Periastron (T)	1995.03y	± 0.566	Semi-major axis (a)	0.3023a	± 0.0021
Eccentricity (e)	0.138	± 0.003	Inclination (i)	143.4°	± 0.5	Longitude of periastron (ω)	263.9°	± 2
Node (Ω)	32.7°	± 0.7	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2015

label	rho	theta
2000	0.219	97.7
2001	0.224	91.7
2002	0.230	85.9
2003	0.236	80.5
2004	0.242	75.3
2005	0.249	70.4
2006	0.256	65.8
2007	0.262	61.4
2008	0.269	57.2
2009	0.275	53.2
2010	0.280	49.4
2011	0.286	45.7
2012	0.290	42.1
2013	0.295	38.7
2014	0.298	35.4
2015	0.302	32.1
2016	0.304	28.9
2017	0.306	25.7
2018	0.308	22.6
2019	0.309	19.5
2020	0.309	16.4
2021	0.309	13.3
2022	0.309	10.2
2023	0.308	7.1
2024	0.307	4.0
2025	0.305	0.8
2026	0.304	357.6
2027	0.302	354.4
2028	0.299	351.2
2029	0.297	347.8
2030	0.295	344.5

grafico orbita

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

wds00428%2B1249b.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
00428+1249	HDS 93		1999	4	99	0.2	10.78	12.02		D	004247.92+124841.8
00428+1249	HDS 93		2004	5	71	0.2	10.78	12.02		D	004247.92+124841.8
00428+1249	HDS 93		2007	6	61	0.3	10.78	12.02		D	004247.92+124841.8
00428+1249	HDS 93		2009	8	51	0.3	10.78	12.02		OD	004247.92+124841.8
00428+1249	HDS 93		2015	9	29	0.3	10.78	12.02		O	004247.92+124841.8
00428+1249	HDS 93		2019	13	18	0.3	10.78	12.02		O	004247.92+124841.8

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