20433+5521 LLO   1

 
 
20h 43m 19.41s +55 20' 52.0" P.A. 1.40 sep 0.0 mag 9.00,13.70
 
 
Coord 2000
20433+5521
Discov num
LLO   1
Comp
Coord arcsec 2000
20 43 19.41 +55 20 52.0
Date first
2004
Date last
2007
Obs
10
Pa first
16
Pa last
20
P.A. Now (θ)
1.4°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.04"
Mag pri
9.00
Mag sec
13.70
delta mag (ΔM)
4.7
Spectral class
Pri motion ra
Sec motion ra
Pri motion dec
Sec motion dec
Notes
N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
20.2
Precise sep
0.086
Constellation
Cepheus
SAO
32834
Gaia DR2
50735384960
last precise pa
20.2
last precise sep
0.086
 
 
ORBITAL ELEMENTS
 
 
Period (P)1104d (3.02y)± 9 Periastron (T)53031d (2004.07y)± 13 Semi-major axis (a)92.9m± 2.1
Eccentricity (e)0.35± 0.05 Inclination (i)82.7°± 3 Longitude of periastron (ω)89.6°± 4.8
Node (Ω)22°± 1.3 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2007
label rho theta
2000-01-01 0.059 9.3
2001-01-01 0.015 51.1
2002-01-01 0.069 211.6
2003-01-01 0.056 8.4
2004-01-01 0.021 42.6
2005-01-01 0.071 211.0
2006-01-01 0.054 7.5
2007-01-01 0.027 37.6
2008-01-01 0.073 210.5
2009-01-01 0.052 6.5
2010-01-01 0.032 34.3
2011-01-01 0.075 210.0
2012-01-01 0.049 5.4
2013-01-01 0.038 32.0
2014-01-01 0.077 209.5
2015-01-01 0.047 4.2
2016-01-01 0.043 30.3
2017-01-01 0.078 209.0
2018-01-01 0.044 2.9
2019-01-01 0.048 29.0
2020-01-01 0.080 208.6
2021-01-01 0.042 1.4
2022-01-01 0.052 27.8
2023-01-01 0.081 208.1
2024-01-01 0.039 359.7
2025-01-01 0.057 26.9
2026-01-01 0.082 207.7
2027-01-01 0.037 357.7
2028-01-01 0.061 26.1
2029-01-01 0.083 207.3
2030-01-01 0.034 355.5

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






wds20433%2B5521a.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
20433+5521 LLO 1 2007 10 20 0.1 9.00 13.70 NO K 204319.41+552052.0

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