19407-0037 CHR  88Aa,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	2020		Obs	21
Pa first	41		Pa last	320		P.A. Now (θ)	315.1°
Sep first	0.1		Sep last	0.1		Sep. Now (ρ)	0.07"
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	2020	21	315	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 visible stars in this system

Precise pa	320.1		Precise sep	0.076		Constellation	Aquila		SAO	143678
HIP	96807		Tycho2	0479-00986-1		HD	185762		HR	7480
GC	27222		ADS	12775		Flamsteed	45 Aquilae		Flamsteed name	45 Aql
Distance	107.99		Distance ly	352.26		last precise pa	320.1		last precise sep	0.076

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	Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox			Last observation	2018

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

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19407-0037	CHR 88	Aa,Ab	2006	11	33	0.1	5.66		A3IV	NOD	194043.31-003716.7
19407-0037	CHR 88	Aa,Ab	2009	12	346	0.1	5.90	7.60	A3IV	NOD	194043.31-003716.7
19407-0037	CHR 88	Aa,Ab	2014	16	252	0.1	5.90	7.60	A3IV	NO	194043.31-003716.7
19407-0037	CHR 88	Aa,Ab	2017	17	197	0.1	5.90	7.60	A3IV	NO	194043.31-003716.7
19407-0037	CHR 88	Aa,Ab	2018	19	4	0.1	5.90	7.60	A3IV	NO	194043.31-003716.7
19407-0037	CHR 88	Aa,Ab	2019	20	348	0.1	5.90	7.60	A3IV	NO	194043.31-003716.7

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