17247+3802 HSL 1 Aa,Ab

Coord 2000	17247+3802		Discov num	HSL   1		Comp	Aa,Ab		Coord arcsec 2000	17 24 42.41 +38 02 10.5
Date first	2001		Date last	2018		Obs	33
Pa first	231		Pa last	225.5		P.A. Now (θ)	225.5°
Sep first	0.0		Sep last	0.021		Sep. Now (ρ)	0.021"
Mag pri	8.28		Mag sec	8.58		delta mag (ΔM)	0.3		Spectral class	G5V+G8V (yellow/yellow)
Pri motion ra	-081		Sec motion ra
Pri motion dec	-194		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		66024	17 24 42 +38 02 10	HSL 1 Aa,Ab	2018	33	226	0.0	8.28	8.58	0.30	Y	<===
Show		66024	17 24 42 +38 02 10	HSL 1 Aa,Ac	2018	46	57	0.3	8.28	10.78	2.50	Y
Show	HD 157948	66024	17 24 42 +38 02 10	COU 1142 AB	2018	21	222	1.8	8.18	12.21	4.03

Quadruple system
2 estimated visually detectable stars in this system

Constellation	Hercules		SAO	66024		HIP	85209		Tycho2	3086-01992-1
Gaia DR2	1337526655053519616		HD	157948		BD	BD+38 2932		Distance	50.61
Distance ly	165.09

Period (P)	1.2283y		Periastron (T)	1986.3731y		Semi-major axis (a)	31.6m	± 0.6
Eccentricity (e)	0.1634		Inclination (i)	81.9°	± 1.8	Longitude of periastron (ω)	356.6°
Node (Ω)	56.7°	± 1.5	Notes	n		Reference	Hor2015
Equinox	2000		Last observation	2014		Grade	2	(1=Definitive, 9=Indet.)

label theta rho 2000 64.2 0.020 2001 47.6 0.018 2002 250.0 0.018 2003 237.6 0.036 2004 229.0 0.026 2005 82.3 0.009 2006 54.7 0.026 2007 287.1 0.006 2008 240.5 0.033 2009 233.1 0.033 2010 198.1 0.007 2011 59.9 0.025 2012 37.0 0.011 2013 244.8 0.024 2014 235.9 0.037 2015 224.5 0.019 2016 68.0 0.017 2017 50.8 0.022 2018 255.7 0.013 2019 238.6 0.036 2020 230.8 0.029 2021 109.2 0.005 2022 56.6 0.026 2023 348.6 0.005 2024 241.8 0.030 2025 234.2 0.035 2026 214.3 0.011 2027 62.2 0.023 2028 44.4 0.016 2029 247.4 0.021 2030 236.9 0.037		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic