Coord 2000	20014+1045	Discov num	STF2613	Comp	AB	Coord arcsec 2000	20 01 26.66 +10 44 54.8
Date first	1828	Date last	2017	Obs	157
Pa first	348	Pa last	356	P.A. Now (θ)	352.1°
Sep first	5.4	Sep last	3.5	Sep. Now (ρ)	4.14"
Mag pri	7.48	Mag sec	8.02	delta mag (ΔM)	0.54	Spectral class	F5V+F5V (yellow-white/yellow-white)
Pri motion ra	+084	Sec motion ra	+084
Pri motion dec	+025	Sec motion dec	+025
Notes	N O (See Notes, Orbital solution)

This double is physical.

20014+1045 SYSTEM COMPONENTS

Show

name

SAO

coord_2000

discov#

comp

first

last

obs

sep

mag1

mag2

d_mag

orb

current

Show

20014+1045

TOK 34

Aa,Ab

2005

2017

341

0.3

7.20

10.60

3.40

Show

20014+1045

STF2613

1828

2017

157

352

4.1

7.48

8.02

0.54

<===

Triple system
2 visible stars in this system

OTHER CATALOGS AND DESIGNATIONS

Precise pa	355.7	Precise sep	3.522	Cdsa2 id	STF 2613 AB	Constellation	Aquila
HIP	98578	HD	189783	ADS	13256	Ra deg	20.02407222222222
De deg	10.748555555555555	Distance	80.58	Distance ly	262.85	last precise pa	355.7
last precise sep	3.522

ORBITAL ELEMENTS

Period (P)	2356y	Periastron (T)	888y	Semi-major axis (a)	3.822a
Eccentricity (e)	0.67	Inclination (i)	81.5°	Longitude of periastron (ω)	52.2°
Node (Ω)	162°	Note		Grade	5	(1=Definitive, 9=Indet.)
Equinox		Last observation

label	rho	theta
2000	4.197	351.8
2001	4.194	351.8
2002	4.190	351.9
2003	4.187	351.9
2004	4.184	351.9
2005	4.181	351.9
2006	4.178	351.9
2007	4.175	351.9
2008	4.172	351.9
2009	4.169	351.9
2010	4.166	352.0
2011	4.163	352.0
2012	4.160	352.0
2013	4.156	352.0
2014	4.153	352.0
2015	4.150	352.0
2016	4.147	352.0
2017	4.144	352.1
2018	4.141	352.1
2019	4.138	352.1
2020	4.134	352.1
2021	4.131	352.1
2022	4.128	352.1
2023	4.125	352.1
2024	4.122	352.2
2025	4.119	352.2
2026	4.115	352.2
2027	4.112	352.2
2028	4.109	352.2
2029	4.106	352.2
2030	4.102	352.2

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

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

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20014+1045	STF2613	AB	2007	138	354	3.6	7.48	8.02	F5V+F5V	NOD	200126.66+104454.8
20014+1045	STF2613	AB	2009	140	354	3.5	7.48	8.02	F5V+F5V	NOD	200126.66+104454.8
20014+1045	STF2613	AB	2010	146	354	3.5	7.48	8.02	F5V+F5V	NOD	200126.66+104454.8
20014+1045	STF2613	AB	2011	147	355	3.5	7.48	8.02	F5V F5V	NOD	200126.66+104454.8
20014+1045	STF2613	AB	2012	147	354	3.6	7.48	8.02	F5V+F5V	NOD	200126.66+104454.8
20014+1045	STF2613	AB	2013	148	354	3.5	7.48	8.02	F5V+F5V	NOD	200126.66+104454.8
20014+1045	STF2613	AB	2015	150	355	3.6	7.48	8.02	F5V+F5V	NO	200126.66+104454.8
20014+1045	STF2613	AB	2016	152	355	3.6	7.48	8.02	F5V+F5V	NO	200126.66+104454.8
20014+1045	STF2613	AB	2017	157	356	3.5	7.48	8.02	F5V+F5V	NO	200126.66+104454.8

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