19407-0037 CHR 88 Aa,Ab

Coord 2000	19407-0037		Discov num	CHR  88		Comp	Aa,Ab		Coord arcsec 2000	19 40 43.31 -00 37 16.7
Date first	1985		Date last	2021		Obs	23
Pa first	41		Pa last	295.8		P.A. Now (θ)	191.4°
Sep first	0.1		Sep last	0.065		Sep. Now (ρ)	0.034"
Mag pri	5.90		Mag sec	7.60		delta mag (ΔM)	1.7		Spectral class	A3IV (white)
Pri motion ra	+017		Sec motion ra
Pri motion dec	+017		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		143678	19 40 43 -00 37 17	CHR 88 Aa,Ab	2021	23	296	0.1	5.90	7.60	1.70	Y	<===
Show	45 Aql	143678	19 40 43 -00 37 17	HJ 2888 AB	2015	8	352	40.3	5.66	14.06	8.40

Triple system
2 estimated visually detectable stars in this system

Constellation	Aquila		SAO	143678		HIP	96807		Tycho2	5145-02349-1
HD	185762		HR	7480		GC	27222		ADS	12775
BD	BD-00 3813		Flamsteed	45 Aquilae		Flamsteed name	45 Aql		FK5	3573
Distance	107.99		Distance ly	352.26

Period (P)	10.155y	± 0.033	Periastron (T)	2012.847y	± 0.056	Semi-major axis (a)	0.0631a	± 0.0006
Eccentricity (e)	0.463	± 0.01	Inclination (i)	180°		Longitude of periastron (ω)	0°
Node (Ω)	191.2°	± 1.1	Notes	n		Reference	Tok2019c
Equinox			Last observation	2018		Grade	3	(1=Definitive, 9=Indet.)

label theta rho 2000 331.7 0.077 2001 305.6 0.061 2002 256.5 0.042 2003 158.8 0.036 2004 91.3 0.054 2005 59.4 0.072 2006 38.9 0.084 2007 22.6 0.091 2008 7.8 0.092 2009 352.6 0.088 2010 334.9 0.079 2011 310.5 0.064 2012 267.0 0.045 2013 174.7 0.034 2014 98.4 0.051 2015 63.3 0.069 2016 41.7 0.083 2017 25.0 0.090 2018 10.1 0.092 2019 355.1 0.089 2020 337.9 0.081 2021 315.1 0.067 2022 276.1 0.048 2023 191.4 0.034 2024 106.5 0.048 2025 67.5 0.067 2026 44.6 0.081 2027 27.4 0.089 2028 12.4 0.092 2029 357.5 0.090 2030 340.8 0.083		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic