19464+3344 STF 2580 AB (Chi Cyg)

19^h 46^m 25.60^s +33° 43' 39.3" P.A. 68.00 sep 25.9 mag 5.06,9.25 Sp F5V dist. 21.23 pc (69.25 l.y.)

Coord 2000	19464+3344		Discov num	STF2580		Comp	AB		Coord arcsec 2000	19 46 25.60 +33 43 39.3
Date first	1822		Date last	2020		Obs	155
Pa first	73		Pa last	68.1		P.A. Now (θ)	68.1°
Sep first	25.5		Sep last	25.89		Sep. Now (ρ)	25.89"
Mag pri	5.06		Mag sec	9.25		delta mag (ΔM)	4.19		Spectral class	F5V (yellow-white)
Pri motion ra	+023		Sec motion ra	+022
Pri motion dec	-448		Sec motion dec	-439
Notes	N O T (See Notes, Orbital solution, Parallax indicates physical)

rPM=0.02 (< 0.3, Physical double)

This double is physical.

19464+3344 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Chi Cyg	68827	19 46 26 +33 43 39	STF 2580 AB	2020	155	68	25.9	5.06	9.25	4.19	Y	<===
Show		68827	19 46 26 +33 43 39	STF 2580 AC	2020	40	122	106.3	5.06	9.44	4.38
Show		68827	19 46 26 +33 43 39	KPR 4 AD	1998	2	47	89.5	5.06	13.30	8.24
Show		68827	19 46 26 +33 43 39	KPR 4 AE	2012	7	63	105.7	5.06	11.98	6.92
Show		68827	19 46 26 +33 43 39	WNO 56 AF	2002	10	235	792.0	5.06	8.48	3.42	Y
Show			19 46 28 +33 43 48	STF 2580 BC	2016	23	139	100.8	9.25	9.44	0.19
Show		68799	19 46 28 +33 43 48	STF 2580 BG	2016	4	235	817.7	9.25	8.58	0.67
Show		68799	19 45 34 +33 36 07	STF 2576 FG	2020	483	155	3.2	8.47	8.58	0.11	Y
Show		68799	19 45 34 +33 36 07	STF 2576 FH	2016	7	348	51.3	8.48	13.80	5.32
Show		68799	19 45 34 +33 36 07	STF 2576 FI	2016	12	333	34.6	8.48	12.40	3.92
Show		68799	19 45 34 +33 36 07	TKA 1 FJ	2016	5	235	23.3	8.48	11.70	3.22
Show		68799	19 45 34 +33 36 07	RAO 69 FK	2015	4	322	17.2	8.48	14.90	6.42
Show		68799	19 45 34 +33 36 04	STF 2576 GI	2016	4	334	37.3	8.58	12.40	3.82
Show		68799	19 45 34 +33 36 04	STF 2576 GJ	2016	7	242	22.5	8.58	11.70	3.12

11-fold system
11 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	Chi Cyg		Var name	NSV12398 Cyg		Constellation	Cygnus		SAO	68827
HIP	97295		Tycho2	2660-04227-1		HD	187013		HR	7534
GC	27369		ADS	12913		GL	Gl 767.1A		BD	BD+33 3587
Bayer	Chi Cygni		Bayer name	Chi Cyg		Flamsteed	17 Cygni		Flamsteed name	17 Cyg
Distance	21.23		Distance ly	69.25		Bayer greek	χ Cyg

ORBITAL ELEMENTS

Period (P)	7904.9885y	± 3402.7299	Periastron (T)	3084.6796y	± 1832.2686	Semi-major axis (a)	40.15567a	± 17.28789
Eccentricity (e)	0.68361	± 0.23569	Inclination (i)	103.92°	± 10.721	Longitude of periastron (ω)	81.415°	± 21.307
Node (Ω)	52.236°	± 27.381	Notes	n		Reference	Izm2019
Equinox			Last observation	2014		Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	68.6	26.078
2001	68.6	26.080
2002	68.5	26.082
2003	68.5	26.084
2004	68.5	26.085
2005	68.5	26.087
2006	68.5	26.089
2007	68.5	26.091
2008	68.4	26.093
2009	68.4	26.095
2010	68.4	26.096
2011	68.4	26.098
2012	68.4	26.100
2013	68.3	26.101
2014	68.3	26.103
2015	68.3	26.105
2016	68.3	26.107
2017	68.3	26.108
2018	68.2	26.110
2019	68.2	26.111
2020	68.2	26.113
2021	68.2	26.115
2022	68.2	26.116
2023	68.1	26.118
2024	68.1	26.119
2025	68.1	26.121
2026	68.1	26.122
2027	68.1	26.124
2028	68.1	26.125
2029	68.0	26.127
2030	68.0	26.128

grafico orbita

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

wds19464%2B3344f.png orbit plot

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