22504-1744 DON 1038
22h 50m 21.55s -17° 44' 20.3" P.A. 67.00 sep 0.4 mag 10.70,11.00 Sp K4/5+K4/5
| Coord 2000 |
22504-1744 |
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Discov num |
DON1038 |
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Comp |
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Coord arcsec 2000 |
22 50 21.55 -17 44 20.3 |
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| Date first |
1932 |
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Date last |
2018 |
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Obs |
12 |
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| Pa first |
344 |
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Pa last |
66.7 |
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P.A. Now (θ) |
252.8° |
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| Sep first |
0.5 |
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Sep last |
0.374 |
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Sep. Now (ρ) |
0.337" |
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| Mag pri |
10.70 |
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Mag sec |
11.00 |
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delta mag (ΔM) |
0.3 |
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Spectral class |
K4/5+K4/5 (yellow-orange/yellow-orange) |
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| Pri motion ra |
-077 |
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Sec motion ra |
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| Pri motion dec |
-031 |
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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
| Constellation |
Aquarius |
|
Tycho2 |
6390-00152-1 |
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ORBITAL ELEMENTS
| Period (P) | 147.13y | ± 5 |
Periastron (T) | 1972.27y | ± 0.6 |
Semi-major axis (a) | 0.488a | ± 0.02 |
| Eccentricity (e) | 0.556 | ± 0.004 |
Inclination (i) | 64.2° | ± 3.5 |
Longitude of periastron (ω) | 97.6° | ± 2 |
| Node (Ω) | 9.9° | ± 0.5 |
Notes | n | |
Reference | Doc2016i | |
| Equinox | 2000 | |
Last observation | 2015 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
216.3 |
0.391 |
| 2001 |
217.7 |
0.390 |
| 2002 |
219.1 |
0.389 |
| 2003 |
220.5 |
0.387 |
| 2004 |
221.9 |
0.385 |
| 2005 |
223.3 |
0.383 |
| 2006 |
224.8 |
0.381 |
| 2007 |
226.2 |
0.378 |
| 2008 |
227.7 |
0.376 |
| 2009 |
229.2 |
0.373 |
| 2010 |
230.7 |
0.371 |
| 2011 |
232.3 |
0.368 |
| 2012 |
233.9 |
0.365 |
| 2013 |
235.4 |
0.362 |
| 2014 |
237.1 |
0.359 |
| 2015 |
238.7 |
0.356 |
| 2016 |
240.4 |
0.354 |
| 2017 |
242.1 |
0.351 |
| 2018 |
243.8 |
0.348 |
| 2019 |
245.6 |
0.346 |
| 2020 |
247.3 |
0.343 |
| 2021 |
249.1 |
0.341 |
| 2022 |
251.0 |
0.339 |
| 2023 |
252.8 |
0.337 |
| 2024 |
254.7 |
0.335 |
| 2025 |
256.6 |
0.333 |
| 2026 |
258.5 |
0.331 |
| 2027 |
260.4 |
0.330 |
| 2028 |
262.4 |
0.329 |
| 2029 |
264.3 |
0.327 |
| 2030 |
266.3 |
0.327 |
| 2031 |
268.3 |
0.326 |
| 2032 |
270.3 |
0.326 |
| 2033 |
272.3 |
0.325 |
| 2034 |
274.2 |
0.326 |
| 2035 |
276.2 |
0.326 |
| 2036 |
278.2 |
0.326 |
| 2037 |
280.2 |
0.327 |
| 2038 |
282.2 |
0.328 |
| 2039 |
284.1 |
0.329 |
| 2040 |
286.0 |
0.331 |
| 2041 |
288.0 |
0.332 |
| 2042 |
289.9 |
0.334 |
| 2043 |
291.7 |
0.336 |
| 2044 |
293.6 |
0.338 |
| 2045 |
295.4 |
0.340 |
| 2046 |
297.2 |
0.343 |
| 2047 |
299.0 |
0.346 |
| 2048 |
300.8 |
0.349 |
| 2049 |
302.5 |
0.352 |
| 2050 |
304.2 |
0.355 |
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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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