20155+4743 S 743 (Omi2 Cyg)

 
 
20h 15m 28.32s +47 42' 51.2" P.A. 175.00 sep 208.5 mag 4.16,8.36 Sp K7Ib+B6V dist. 324.68 pc (1059.11 l.y.)
 
 
Coord 2000 20155+4743 Discov num S   743 Comp Coord arcsec 2000 20 15 28.32 +47 42 51.2
Date first 1824 Date last 2015 Obs 13
Pa first 175 Pa last 174.7 P.A. Now (θ) 174.7°
Sep first 208.9 Sep last 208.496 Sep. Now (ρ) 208.496"
Mag pri 4.16 Mag sec 8.36 delta mag (ΔM) 4.2 Spectral class K7Ib+B6V (yellow-orange/blue-white)
Pri motion ra +000 Sec motion ra +004
Pri motion dec -002 Sec motion dec +005
Notes N S (See Notes, Parallax indidates non-physical)
rPM=1.259
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Omi2 Cyg Var name V1488 Cyg Constellation Cygnus SAO 49385
HIP 99848 Tycho2 3576-02157-1 Gaia DR2 2084154943645178368 HD 192909
HR 7751 GC 28160 BD BD+47 3059 Bayer Omicron 2 Cygni
Bayer name Omi2 Cyg Flamsteed 32 Cygni Flamsteed name 32 Cyg Distance 324.68
Distance ly 1059.11 Bayer greek ο2 Cyg
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
Identifier20155+4743
coord_arcsec_2000201528.32+474251.1
Period (P)1147.51d (3.14y) Periastron (T)52646.9d (2003.018y) Semi-major axis (a)3.4m± 0.2
Eccentricity (e)0.304 Inclination (i)57.1°± 4.2 Longitude of periastron (ω)221.4°
Node (Ω)48°± 2.3 Notesn ReferenceRen2013
Equinox2000 Last observation Grade9(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 282.5 0.002
2001-01-01 54.4 0.004
2002-01-01 118.4 0.002
2003-01-01 250.5 0.002
2004-01-01 48.5 0.004
2005-01-01 102.2 0.003
2006-01-01 231.5 0.002
2007-01-01 42.1 0.004
2008-01-01 90.0 0.003
2009-01-01 216.5 0.003
2010-01-01 34.4 0.003
2011-01-01 80.6 0.003
2012-01-01 201.3 0.002
2013-01-01 23.7 0.003
2014-01-01 72.9 0.004
2015-01-01 183.7 0.002
2016-01-01 6.4 0.002
2017-01-01 66.3 0.004
2018-01-01 162.7 0.002
2019-01-01 333.1 0.001
2020-01-01 60.4 0.004
2021-01-01 140.0 0.002
2022-01-01 284.8 0.001
2023-01-01 54.7 0.004
2024-01-01 119.3 0.002
2025-01-01 251.8 0.002
2026-01-01 48.9 0.004
2027-01-01 103.0 0.003
2028-01-01 232.4 0.002
2029-01-01 42.5 0.004
2030-01-01 90.6 0.003


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



 
 


wds20155%2B4743f.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic