21477-1813 CHR 223 (HD 207208)
21h 47m 44.82s -18° 12' 46.9" P.A. 269.00 sep 0.1 mag 7.60,9.30 Sp A5IV dist. 139.86 pc (456.22 l.y.)
| Coord 2000 |
21477-1813 |
|
Discov num |
CHR 223 |
|
Comp |
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Coord arcsec 2000 |
21 47 44.82 -18 12 46.9 |
|
| Date first |
1994 |
|
Date last |
2020 |
|
Obs |
7 |
|
| Pa first |
334 |
|
Pa last |
269.1 |
|
P.A. Now (θ) |
269.1° |
|
| Sep first |
0.1 |
|
Sep last |
0.087 |
|
Sep. Now (ρ) |
0.087" |
|
| Mag pri |
7.60 |
|
Mag sec |
9.30 |
|
delta mag (ΔM) |
1.7 |
|
Spectral class |
A5IV (white) |
|
| Pri motion ra |
+030 |
|
Sec motion ra |
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| Pri motion dec |
+006 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 207208 |
|
Constellation |
Capricornus |
|
SAO |
164657 |
|
HIP |
107610 |
|
| Tycho2 |
6367-01126-1 |
|
Gaia DR2 |
6836687057251744000 |
|
HD |
207208 |
|
BD |
BD-18 6013 |
|
| Distance |
139.86 |
|
Distance ly |
456.22 |
|
ORBITAL ELEMENTS
| Period (P) | 73.829y | |
Periastron (T) | 2025.728y | |
Semi-major axis (a) | 0.1713a | |
| Eccentricity (e) | 0.311 | |
Inclination (i) | 109.9° | |
Longitude of periastron (ω) | 275.3° | |
| Node (Ω) | 110.9° | |
Notes | n | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
315.4 |
0.139 |
| 2001 |
313.1 |
0.144 |
| 2002 |
310.9 |
0.149 |
| 2003 |
308.9 |
0.154 |
| 2004 |
307.0 |
0.158 |
| 2005 |
305.2 |
0.162 |
| 2006 |
303.4 |
0.165 |
| 2007 |
301.7 |
0.167 |
| 2008 |
300.1 |
0.168 |
| 2009 |
298.5 |
0.169 |
| 2010 |
296.8 |
0.169 |
| 2011 |
295.2 |
0.167 |
| 2012 |
293.5 |
0.165 |
| 2013 |
291.8 |
0.162 |
| 2014 |
290.0 |
0.157 |
| 2015 |
288.0 |
0.151 |
| 2016 |
285.9 |
0.143 |
| 2017 |
283.5 |
0.134 |
| 2018 |
280.7 |
0.124 |
| 2019 |
277.4 |
0.113 |
| 2020 |
273.3 |
0.100 |
| 2021 |
267.9 |
0.086 |
| 2022 |
260.4 |
0.072 |
| 2023 |
249.2 |
0.058 |
| 2024 |
231.7 |
0.046 |
| 2025 |
206.2 |
0.040 |
| 2026 |
178.6 |
0.043 |
| 2027 |
157.8 |
0.053 |
| 2028 |
144.4 |
0.066 |
| 2029 |
135.6 |
0.080 |
| 2030 |
129.5 |
0.094 |
|
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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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