20433+5521 LLO 1
20h 43m 19.41s +55° 20' 52.0" P.A. 20.00 sep 0.1 mag 9.00,13.70
| Coord 2000 |
20433+5521 |
|
Discov num |
LLO 1 |
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Comp |
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Coord arcsec 2000 |
20 43 19.41 +55 20 52.0 |
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| Date first |
2004 |
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Date last |
2007 |
|
Obs |
10 |
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| Pa first |
16 |
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Pa last |
20.2 |
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P.A. Now (θ) |
20.2° |
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| Sep first |
0.1 |
|
Sep last |
0.086 |
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Sep. Now (ρ) |
0.086" |
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| Mag pri |
9.00 |
|
Mag sec |
13.70 |
|
delta mag (ΔM) |
4.7 |
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Spectral class |
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| Pri motion ra |
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Sec motion ra |
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| Pri motion dec |
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Sec motion dec |
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| Notes |
N
O
K
(See Notes, Orbital solution, K-band or other infrared magnitudes) |
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Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cepheus |
|
Gaia DR2 |
2183783650735384960 |
|
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 |
Notes | n | |
Reference | Ire2008 | |
| Equinox | 2000 | |
Last observation | 2007 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
9.3 |
0.059 |
| 2001-01-01 |
51.1 |
0.015 |
| 2002-01-01 |
211.6 |
0.069 |
| 2003-01-01 |
8.4 |
0.056 |
| 2004-01-01 |
42.6 |
0.021 |
| 2005-01-01 |
211.0 |
0.071 |
| 2006-01-01 |
7.5 |
0.054 |
| 2007-01-01 |
37.6 |
0.027 |
| 2008-01-01 |
210.5 |
0.073 |
| 2009-01-01 |
6.5 |
0.052 |
| 2010-01-01 |
34.3 |
0.032 |
| 2011-01-01 |
210.0 |
0.075 |
| 2012-01-01 |
5.4 |
0.049 |
| 2013-01-01 |
32.0 |
0.038 |
| 2014-01-01 |
209.5 |
0.077 |
| 2015-01-01 |
4.2 |
0.047 |
| 2016-01-01 |
30.3 |
0.043 |
| 2017-01-01 |
209.0 |
0.078 |
| 2018-01-01 |
2.9 |
0.044 |
| 2019-01-01 |
29.0 |
0.048 |
| 2020-01-01 |
208.6 |
0.080 |
| 2021-01-01 |
1.4 |
0.042 |
| 2022-01-01 |
27.8 |
0.052 |
| 2023-01-01 |
208.1 |
0.081 |
| 2024-01-01 |
359.7 |
0.039 |
| 2025-01-01 |
26.9 |
0.057 |
| 2026-01-01 |
207.7 |
0.082 |
| 2027-01-01 |
357.7 |
0.037 |
| 2028-01-01 |
26.1 |
0.061 |
| 2029-01-01 |
207.3 |
0.083 |
| 2030-01-01 |
355.5 |
0.034 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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