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Doubles in this session

Current system

20102+4357
STT 400

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KOI4567

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KOI7051

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KOI5556AB

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KOI4407AB

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OSO 118AB

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ARG 89

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Binocular doubles

Quadruple Systems

Multiple Systems

Neglected List I

Neglected List II

Herschel, J.F.W.

20102+4357 STT 400

20^h 10^m 13.32^s +43° 56' 44.2" P.A. 327 sep 0.65 mag 7.60,9.83 Sp G3V dist. 51.33 pc (167.44 l.y.)

Coord 2000	20102+4357		Discov num	STT 400		Comp			Coord arcsec 2000	20 10 13.32 +43 56 44.2
Date first	1843		Date last	2017		Obs	240
Pa first	327		Pa last	329		P.A. Now (θ)	327°
Sep first	0.5		Sep last	0.7		Sep. Now (ρ)	0.65"
Mag pri	7.60		Mag sec	9.83		delta mag (ΔM)	2.23		Spectral class	G3V (yellow)
Pri motion ra	+009		Sec motion ra	+009
Pri motion dec	+089		Sec motion dec	+089
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	328.7		Precise sep	0.695		Constellation	Cygnus		SAO	49262
HIP	99376		Tycho2	3163-01459-1		Gaia DR2	69591424896		HD	191854
ADS	13461		BD	BD+43 3513		Distance	51.33		Distance ly	167.44
last precise pa	328.7		last precise sep	0.695

ORBITAL ELEMENTS

Period (P)	85.61y		Periastron (T)	1970.27y		Semi-major axis (a)	0.449a
Eccentricity (e)	0.488		Inclination (i)	116.4°		Longitude of periastron (ω)	339.4°
Node (Ω)	142.2°		Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label	rho	theta
2000	0.491	345.0
2001	0.506	343.6
2002	0.522	342.4
2003	0.536	341.2
2004	0.549	340.1
2005	0.562	339.0
2006	0.574	338.0
2007	0.585	337.0
2008	0.595	336.1
2009	0.605	335.2
2010	0.613	334.3
2011	0.621	333.4
2012	0.628	332.6
2013	0.634	331.7
2014	0.639	330.9
2015	0.643	330.1
2016	0.646	329.3
2017	0.648	328.6
2018	0.649	327.8
2019	0.650	327.0
2020	0.649	326.2
2021	0.647	325.4
2022	0.644	324.6
2023	0.641	323.8
2024	0.636	323.0
2025	0.630	322.2
2026	0.623	321.4
2027	0.615	320.5
2028	0.605	319.6
2029	0.595	318.7
2030	0.583	317.8

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

grafico orbita

wds20102%2B4357b.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
20102+4357	STT 400		2007	230	336	0.6	7.60	9.83	G3V	NOD	201013.32+435644.2
20102+4357	STT 400		2008	234	335	0.6	7.60	9.83	G3V	NOD	201013.32+435644.2
20102+4357	STT 400		2010	235	333	0.6	7.60	9.83	G3V	NOD	201013.32+435644.2
20102+4357	STT 400		2012	235	333	0.7	7.60	9.83	G3V	NOD	201013.32+435644.2
20102+4357	STT 400		2013	237	330	0.6	7.60	9.83	G3V	NO	201013.32+435644.2
20102+4357	STT 400		2016	238	329	0.7	7.60	9.83	G3V	NO	201013.32+435644.2
20102+4357	STT 400		2017	240	329	0.7	7.60	9.83	G3V	NO	201013.32+435644.2

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