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20290+0710
A 610

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

20290+0710 A 610

20^h 29^m 02.58^s +07° 09' 29.3" P.A. 98.00 sep 0.5 mag 9.52,9.91 Sp G0 dist. 78.12 pc (254.83 l.y.)

Coord 2000	20290+0710		Discov num	A 610		Comp			Coord arcsec 2000	20 29 02.58 +07 09 29.3
Date first	1901		Date last	2018		Obs	84
Pa first	189		Pa last	93		P.A. Now (θ)	98°
Sep first	0.5		Sep last	0.5		Sep. Now (ρ)	0.46"
Mag pri	9.52		Mag sec	9.91		delta mag (ΔM)	0.39		Spectral class	G0 (yellow)
Pri motion ra	-050		Sec motion ra
Pri motion dec	-002		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	92.6		Precise sep	0.506		Constellation	Delphinus		HIP	101046
Tycho2	0509-01364-1		HD	195090		ADS	13894		BD	BD+06 4543
Distance	78.12		Distance ly	254.83		last precise pa	92.6		last precise sep	0.506

ORBITAL ELEMENTS

Period (P)	170.62y		Periastron (T)	1984.25y		Semi-major axis (a)	0.472a
Eccentricity (e)	0.232		Inclination (i)	30.3°		Longitude of periastron (ω)	285.2°
Node (Ω)	72°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox			Last observation	2000

label	rho	theta
2000	0.383	52.1
2001	0.388	54.7
2002	0.393	57.3
2003	0.398	59.8
2004	0.403	62.3
2005	0.407	64.7
2006	0.412	67.1
2007	0.416	69.4
2008	0.420	71.6
2009	0.424	73.8
2010	0.428	76.0
2011	0.432	78.1
2012	0.435	80.2
2013	0.438	82.3
2014	0.441	84.4
2015	0.444	86.4
2016	0.447	88.4
2017	0.450	90.3
2018	0.452	92.3
2019	0.455	94.2
2020	0.457	96.1
2021	0.459	98.0
2022	0.461	99.8
2023	0.463	101.7
2024	0.464	103.5
2025	0.466	105.3
2026	0.467	107.2
2027	0.469	109.0
2028	0.470	110.8
2029	0.471	112.5
2030	0.473	114.3

grafico orbita

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

wds20290%2B0710a.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
20290+0710	A 610		2002	77	58	0.3	9.52	9.91	G0	NOD	202902.58+070929.3
20290+0710	A 610		2006	78	69	0.4	9.52	9.91	G0	NOD	202902.58+070929.3
20290+0710	A 610		2007	79	70	0.4	9.52	9.91	G0	NOD	202902.58+070929.3
20290+0710	A 610		2015	80	87	0.5	9.52	9.91	G0	NO	202902.58+070929.3
20290+0710	A 610		2017	81	91	0.5	9.52	9.91	G0	NO	202902.58+070929.3
20290+0710	A 610		2018	82	93	0.5	9.52	9.91	G0	NO	202902.58+070929.3

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