22268+4033 COU 1642 (HD 212900)
22h 26m 47.41s +40° 33' 29.6" P.A. 99.00 sep 0.2 mag 8.50,8.50 Sp A0
| Coord 2000 |
22268+4033 |
|
Discov num |
COU1642 |
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Comp |
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Coord arcsec 2000 |
22 26 47.41 +40 33 29.6 |
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| Date first |
1977 |
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Date last |
2014 |
|
Obs |
21 |
|
| Pa first |
81 |
|
Pa last |
99.2 |
|
P.A. Now (θ) |
99.2° |
|
| Sep first |
0.2 |
|
Sep last |
0.158 |
|
Sep. Now (ρ) |
0.158" |
|
| Mag pri |
8.50 |
|
Mag sec |
8.50 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
A0 (white) |
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| Pri motion ra |
+001 |
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Sec motion ra |
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|
| Pri motion dec |
-012 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 212900 |
|
Constellation |
Lacerta |
|
SAO |
52005 |
|
Tycho2 |
3204-01320-1 |
|
| Gaia DR2 |
1909370184372777216 |
|
HD |
212900 |
|
ORBITAL ELEMENTS
| Period (P) | 433.8y | ± 52.8 |
Periastron (T) | 2026y | ± 5.8 |
Semi-major axis (a) | 0.247a | ± 0.02 |
| Eccentricity (e) | 0.277 | ± 0.055 |
Inclination (i) | 59.3° | ± 1 |
Longitude of periastron (ω) | 11.9° | ± 6.9 |
| Node (Ω) | 101.3° | ± 1 |
Notes | | |
Reference | Ksr2021 | |
| Equinox | | |
Last observation | 2011 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
87.0 |
0.173 |
| 2001 |
87.9 |
0.174 |
| 2002 |
88.7 |
0.175 |
| 2003 |
89.5 |
0.175 |
| 2004 |
90.3 |
0.176 |
| 2005 |
91.1 |
0.177 |
| 2006 |
91.9 |
0.177 |
| 2007 |
92.7 |
0.178 |
| 2008 |
93.4 |
0.178 |
| 2009 |
94.2 |
0.179 |
| 2010 |
95.0 |
0.179 |
| 2011 |
95.8 |
0.179 |
| 2012 |
96.5 |
0.179 |
| 2013 |
97.3 |
0.180 |
| 2014 |
98.1 |
0.180 |
| 2015 |
98.9 |
0.180 |
| 2016 |
99.6 |
0.180 |
| 2017 |
100.4 |
0.180 |
| 2018 |
101.2 |
0.179 |
| 2019 |
101.9 |
0.179 |
| 2020 |
102.7 |
0.179 |
| 2021 |
103.5 |
0.179 |
| 2022 |
104.3 |
0.178 |
| 2023 |
105.1 |
0.178 |
| 2024 |
105.8 |
0.177 |
| 2025 |
106.6 |
0.176 |
| 2026 |
107.4 |
0.176 |
| 2027 |
108.2 |
0.175 |
| 2028 |
109.1 |
0.174 |
| 2029 |
109.9 |
0.173 |
| 2030 |
110.7 |
0.172 |
|
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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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