20113-0049 MKT  10Aa,Ab

Coord 2000	20113-0049		Discov num	MKT  10		Comp	Aa,Ab		Coord arcsec 2000	20 11 18.26 -00 49 17.3
Date first	1990		Date last	1992		Obs	21
Pa first	57		Pa last	179		P.A. Now (θ)	179°
Sep first	0.0		Sep last	0.0		Sep. Now (ρ)	0"
Mag pri	3.23		Mag sec			delta mag (ΔM)			Spectral class	B9.5III (blue-white)
Pri motion ra	+038		Sec motion ra
Pri motion dec	+004		Sec motion dec
Notes	N O (See Notes, Orbital solution)

Visually invisible, K-band or other infrared star This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		144150	20113-0049	MKT 10	Aa,Ab	1990	1992	21	179	0.0	3.23			Y	<===
Show		144150	20113-0049	ISO 12	Aa,Ac	1987	1987	1	44	1.0	3.23
Show	65 Aql	144150	20113-0049	BU 1540	AB	1901	2008	4	259	115.8	3.23	13.00	9.77

Quadruple system
2 visible stars in this system

Precise pa	179		Precise sep	0.001		Constellation	Aquila		SAO	144150
HIP	99473		HD	191692		HR	7710		GC	28010
Bayer	Theta Aquilae		Bayer name	The Aql		Flamsteed	65 Aquilae		Flamsteed name	65 Aql
Distance	87.8		Distance ly	286.4		last precise pa	179		last precise sep	0.001

Period (P)	17.122d	± 0.001	Periastron (T)	47801.7d (1989.752y)	± 0.1	Semi-major axis (a)	3.2m	± 0.1
Eccentricity (e)	0.6	± 0.02	Inclination (i)	143.5°	± 3	Longitude of periastron (ω)	215°	± 10
Node (Ω)	99°	± 5	Note			Grade	1	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	1992

label rho theta 2000-01-01 0.004 57.8 2001-01-01 0.002 319.6 2002-01-01 0.004 94.0 2003-01-01 0.004 58.4 2004-01-01 0.002 323.4 2005-01-01 0.004 94.6 2006-01-01 0.004 59.0 2007-01-01 0.002 327.1 2008-01-01 0.004 95.3 2009-01-01 0.005 59.5 2010-01-01 0.002 330.5 2011-01-01 0.004 95.9 2012-01-01 0.005 60.1 2013-01-01 0.002 333.9 2014-01-01 0.004 96.5 2015-01-01 0.005 60.6 2016-01-01 0.002 337.1 2017-01-01 0.004 97.2 2018-01-01 0.005 61.2 2019-01-01 0.002 340.1 2020-01-01 0.004 97.9 2021-01-01 0.005 61.7 2022-01-01 0.002 343.0 2023-01-01 0.004 98.5 2024-01-01 0.005 62.2 2025-01-01 0.002 345.8 2026-01-01 0.004 99.2 2027-01-01 0.005 62.7 2028-01-01 0.002 348.5 2029-01-01 0.004 99.9 2030-01-01 0.005 63.3 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
20113-0049	MKT 10	Aa,Ab	1992	21	179	0.0	3.23		B9.5III	NO	201118.26-004917.3

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