17176+1025 HDS 2445 (V2369 Oph)

17^h 17^m 34.67^s +10° 24' 59.3" P.A. 242.00 sep 0.1 mag 8.86,10.25 Sp G5 dist. 69.49 pc (226.68 l.y.)

Coord 2000	17176+1025		Discov num	HDS2445		Comp			Coord arcsec 2000	17 17 34.67 +10 24 59.3
Date first	1991		Date last	2021		Obs	15
Pa first	86		Pa last	241.6		P.A. Now (θ)	212.8°
Sep first	0.3		Sep last	0.082		Sep. Now (ρ)	0.047"
Mag pri	8.86		Mag sec	10.25		delta mag (ΔM)	1.39		Spectral class	G5 (yellow)
Pri motion ra	+025		Sec motion ra
Pri motion dec	-041		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Var name	V2369 Oph		Constellation	Ophiuchus		SAO	102718		HIP	84595
Tycho2	0982-02178-1		Gaia DR2	4539777137632191744		HD	156498		BD	BD+10 3177
Distance	69.49		Distance ly	226.68

ORBITAL ELEMENTS

Period (P)	45.8y	± 3.44	Periastron (T)	2009.14y	± 2.7	Semi-major axis (a)	0.2781a	± 0.0063
Eccentricity (e)	0.149	± 0.07	Inclination (i)	97.2°	± 0.5	Longitude of periastron (ω)	140.4°	± 23.7
Node (Ω)	84.7°	± 0.9	Notes	n		Reference	Tok2017b
Equinox	2000		Last observation			Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	75.7	0.171
2001	72.5	0.136
2002	66.9	0.099
2003	54.7	0.062
2004	15.8	0.034
2005	310.1	0.043
2006	286.8	0.077
2007	278.2	0.114
2008	273.8	0.149
2009	270.9	0.179
2010	268.9	0.205
2011	267.3	0.225
2012	265.9	0.238
2013	264.6	0.244
2014	263.3	0.244
2015	262.0	0.237
2016	260.6	0.225
2017	259.0	0.208
2018	257.1	0.186
2019	254.5	0.160
2020	251.0	0.132
2021	245.5	0.102
2022	235.3	0.073
2023	212.8	0.047
2024	165.8	0.038
2025	127.7	0.056
2026	111.3	0.084
2027	103.5	0.114
2028	98.9	0.144
2029	95.9	0.173
2030	93.7	0.200

grafico orbita

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

wds17176%2B1025e.png orbit plot

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