19418+5032 TRN 4 Aa,Ab

19^h 41^m 49.09^s +50° 31' 31.6" P.A. 207.00 sep 3.3 mag 5.99,13.00 Sp G1.5V+M5V dist. 21.08 pc (68.76 l.y.)

Coord 2000	19418+5032		Discov num	TRN 4		Comp	Aa,Ab		Coord arcsec 2000	19 41 49.09 +50 31 31.6
Date first	1998		Date last	2016		Obs	14
Pa first	204		Pa last	206.6		P.A. Now (θ)	206.6°
Sep first	3.5		Sep last	3.26		Sep. Now (ρ)	3.26"
Mag pri	5.99		Mag sec	13.00		delta mag (ΔM)	7.01		Spectral class	G1.5V+M5V (yellow/red)
Pri motion ra	-146		Sec motion ra
Pri motion dec	-155		Sec motion dec
Notes	N V (See Notes, Proper motion indicates physical)

This double is physical.

19418+5032 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		31898	19 41 49 +50 31 32	TRN 4 Aa,Ab	2016	14	207	3.3	5.99	13.00	7.01	Y	<===
Show	16 Cyg	31898	19 41 49 +50 31 32	STFA 46 AB	2020	591	133	39.7	6.00	6.23	0.23
Show			19 41 52 +50 31 03	PAT 48 BC	2015	5	70	18.2	4.65	11.91	7.26

Quadruple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Cygnus		SAO	31898		HIP	96895		Tycho2	3565-01524-1
HD	186408		HR	7503		GC	27284		ADS	12815
GL	Gl 765.1A		BD	BD+50 2847		Flamsteed	16 Cygni		Flamsteed name	16 Cyg
Distance	21.08		Distance ly	68.76

SUSPECTED ORBITAL ELEMENTS

Identifier	19418+5032
coord_arcsec_2000	194149.09+503131.6

Period (P)	135.127c		Periastron (T)	153.25y		Semi-major axis (a)	35.242a
Eccentricity (e)	0.863		Inclination (i)	135.44°		Longitude of periastron (ω)	26.6°
Node (Ω)	313.44°		Notes	n		Reference	Mrc1999
Equinox	2000		Last observation	1998		Grade	4	(1=Definitive, 9=Indet.)

label	theta	rho
2000	133.3	39.552
2001	133.3	39.565
2002	133.3	39.577
2003	133.3	39.590
2004	133.3	39.602
2005	133.3	39.615
2006	133.3	39.627
2007	133.3	39.639
2008	133.3	39.652
2009	133.3	39.664
2010	133.3	39.677
2011	133.3	39.689
2012	133.3	39.701
2013	133.2	39.714
2014	133.2	39.726
2015	133.2	39.739
2016	133.2	39.751
2017	133.2	39.763
2018	133.2	39.776
2019	133.2	39.788
2020	133.2	39.801
2021	133.2	39.813
2022	133.2	39.825
2023	133.2	39.838
2024	133.2	39.850
2025	133.2	39.862
2026	133.1	39.875
2027	133.1	39.887
2028	133.1	39.899
2029	133.1	39.912
2030	133.1	39.924

grafico orbita

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

wds19418%2B5032c.png orbit plot

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