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00093+7943
STF 2

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

00093+7943 STF 2

00^h 09^m 20.18^s +79° 42' 52.4" P.A. 14.30 sep 0.9 mag 6.68,6.89 Sp A4IV dist. 105.49 pc (344.11 l.y.)

Coord 2000	00093+7943		Discov num	STF 2		Comp			Coord arcsec 2000	00 09 20.18 +79 42 52.4
Date first	1828		Date last	2019		Obs	213
Pa first	343		Pa last	15		P.A. Now (θ)	14.3°
Sep first	0.8		Sep last	0.9		Sep. Now (ρ)	0.95"
Mag pri	6.68		Mag sec	6.89		delta mag (ΔM)	0.21		Spectral class	A4IV (white)
Pri motion ra	+106		Sec motion ra	+106
Pri motion dec	-033		Sec motion dec	-033
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	14.6		Precise sep	0.94		Constellation	Cepheus		SAO	4048
HIP	760		Tycho2	4500-01334-1		Gaia DR2	565004017238715264		HD	431
HR	20		ADS	102		BD	BD+78 1		Distance	105.49
Distance ly	344.11		last precise pa	14.6		last precise sep	0.94

ORBITAL ELEMENTS

Period (P)	540y		Periastron (T)	1887.5y		Semi-major axis (a)	0.995a
Eccentricity (e)	0.715		Inclination (i)	110.1°		Longitude of periastron (ω)	333.7°
Node (Ω)	171.2°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label	rho	theta
2000	0.788	18.7
2001	0.796	18.5
2002	0.804	18.2
2003	0.812	18.0
2004	0.819	17.8
2005	0.827	17.5
2006	0.835	17.3
2007	0.842	17.1
2008	0.850	16.9
2009	0.857	16.6
2010	0.865	16.4
2011	0.872	16.2
2012	0.880	16.0
2013	0.887	15.8
2014	0.895	15.6
2015	0.902	15.4
2016	0.909	15.2
2017	0.916	15.0
2018	0.924	14.8
2019	0.931	14.7
2020	0.938	14.5
2021	0.945	14.3
2022	0.952	14.1
2023	0.959	13.9
2024	0.966	13.8
2025	0.973	13.6
2026	0.980	13.4
2027	0.987	13.3
2028	0.993	13.1
2029	1.000	13.0
2030	1.007	12.8

grafico orbita

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

wds00093%2B7943a.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
00093+7943	STF 2		2005	214	18	0.8	6.68	6.89	A4IV	NOD	000920.18+794252.4
00093+7943	STF 2		2007	215	18	0.8	6.68	6.89	A4IV	NOD	000920.18+794252.4
00093+7943	STF 2		2010	216	17	0.8	6.68	6.89	A4IV	NOD	000920.18+794252.4
00093+7943	STF 2		2012	208	17	0.9	6.68	6.89	A4IV	NOD	000920.18+794252.4
00093+7943	STF 2		2015	210	17	0.9	6.68	6.89	A4IV	NO	000920.18+794252.4
00093+7943	STF 2		2018	211	17	0.9	6.68	6.89	A4IV	NO	000920.18+794252.4
00093+7943	STF 2		2019	212	15	0.9	6.68	6.89	A4IV	NO	000920.18+794252.4

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