20080+4204 A   383

 
 
20h 08m 00.45s +42 03' 39.4" P.A. 7.8 sep 0.34 mag 10.37,10.43 Sp F2
 
 
Coord 2000
20080+4204
Discov num
A   383
Comp
Coord arcsec 2000
20 08 00.45 +42 03 39.4
Date first
1902
Date last
2008
Obs
15
Pa first
55
Pa last
7
P.A. Now (θ)
7.8°
Sep first
0.3
Sep last
0.4
Sep. Now (ρ)
0.34"
Mag pri
10.37
Mag sec
10.43
delta mag (ΔM)
0.06
Spectral class
F2 (yellow-white)
Pri motion ra
-006
Sec motion ra
-006
Pri motion dec
-004
Sec motion dec
-004
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
7.3
Precise sep
0.353
Constellation
Cygnus
SAO
49214
Tycho2
3158-01559-1
HD
227855
ADS
13418
last precise pa
7.3
last precise sep
0.353
 
 
ORBITAL ELEMENTS
 
 
Period (P)453y Periastron (T)2318.9y Semi-major axis (a)0.478a
Eccentricity (e)0.678 Inclination (i)115° Longitude of periastron (ω)94°
Node (Ω)251° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.351 16.7
2001 0.350 16.2
2002 0.350 15.8
2003 0.350 15.3
2004 0.349 14.9
2005 0.349 14.4
2006 0.348 13.9
2007 0.348 13.5
2008 0.347 13.0
2009 0.347 12.5
2010 0.347 12.1
2011 0.346 11.6
2012 0.346 11.1
2013 0.345 10.6
2014 0.345 10.2
2015 0.345 9.7
2016 0.344 9.2
2017 0.344 8.7
2018 0.344 8.3
2019 0.343 7.8
2020 0.343 7.3
2021 0.343 6.8
2022 0.342 6.4
2023 0.342 5.9
2024 0.342 5.4
2025 0.341 4.9
2026 0.341 4.4
2027 0.341 3.9
2028 0.340 3.4
2029 0.340 3.0
2030 0.340 2.5

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






wds20080%2B4204a.png orbit plot
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
20080+4204 A 383 1995 14 21 0.2 10.37 10.43 F2 200800.45+420339.4
20080+4204 A 383 2008 15 7 0.4 10.37 10.43 F2 200800.45+420339.4

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