19411+1349 KUI 93 (QS Aql)

19^h 41^m 05.53^s +13° 48' 56.5" P.A. 317.00 sep 0.1 mag 6.69,6.75 Sp B5V+A8IV dist. 2040.82 pc (6657.15 l.y.)

Coord 2000	19411+1349		Discov num	KUI 93		Comp			Coord arcsec 2000	19 41 05.53 +13 48 56.5
Date first	1934		Date last	2018		Obs	83
Pa first	137		Pa last	316.8		P.A. Now (θ)	319.8°
Sep first	0.2		Sep last	0.13		Sep. Now (ρ)	0.092"
Mag pri	6.69		Mag sec	6.75		delta mag (ΔM)	0.06		Spectral class	B5V+A8IV (blue-white/white)
Pri motion ra	-002		Sec motion ra
Pri motion dec	-010		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Var name	QS Aql		Constellation	Aquila		SAO	105132		HIP	96840
Tycho2	1069-03884-1		Gaia DR2	4317157059905694592		HD	185936		HR	7486
GC	27235		BD	BD+13 4098		FK5	3574		Distance	2040.82
Distance ly	6657.15

ORBITAL ELEMENTS

Period (P)	65.57y	± 1.3	Periastron (T)	1963.4y	± 2.6	Semi-major axis (a)	0.101a	± 0.002
Eccentricity (e)	0.947		Inclination (i)	64.5°	± 2.5	Longitude of periastron (ω)	357.6°	± 33.2
Node (Ω)	132.1°	± 13.8	Notes	n		Reference	Tok2021c
Equinox	2000		Last observation	2018		Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	311.8	0.195
2001	312.0	0.194
2002	312.2	0.193
2003	312.5	0.191
2004	312.7	0.189
2005	312.9	0.187
2006	313.1	0.185
2007	313.3	0.183
2008	313.6	0.180
2009	313.8	0.177
2010	314.1	0.173
2011	314.3	0.169
2012	314.6	0.165
2013	314.9	0.161
2014	315.2	0.156
2015	315.5	0.151
2016	315.9	0.146
2017	316.3	0.140
2018	316.7	0.133
2019	317.1	0.126
2020	317.7	0.119
2021	318.3	0.111
2022	318.9	0.102
2023	319.8	0.092
2024	320.8	0.082
2025	322.1	0.070
2026	324.1	0.057
2027	327.4	0.041
2028	335.8	0.022
2029	139.2	0.005
2030	285.7	0.022

grafico orbita

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

wds19411%2B1349g.png orbit plot

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