17466-0354 A 33 (HD 161588)
17h 46m 35.43s -03° 54' 25.8" P.A. 221.00 sep 0.8 mag 9.34,10.22 Sp F8
| Coord 2000 |
17466-0354 |
|
Discov num |
A 33 |
|
Comp |
|
|
Coord arcsec 2000 |
17 46 35.43 -03 54 25.8 |
|
| Date first |
1899 |
|
Date last |
2016 |
|
Obs |
25 |
|
| Pa first |
235 |
|
Pa last |
220.6 |
|
P.A. Now (θ) |
220.6° |
|
| Sep first |
0.7 |
|
Sep last |
0.767 |
|
Sep. Now (ρ) |
0.767" |
|
| Mag pri |
9.34 |
|
Mag sec |
10.22 |
|
delta mag (ΔM) |
0.88 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
+019 |
|
Sec motion ra |
+019 |
|
| Pri motion dec |
+002 |
|
Sec motion dec |
+002 |
|
| Notes |
|
|
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 161588 |
|
Constellation |
Ophiuchus |
|
SAO |
141863 |
|
Tycho2 |
5090-00560-1 |
|
| Gaia DR2 |
4176818105808236544 |
|
HD |
161588 |
|
ADS |
10780 |
|
ORBITAL ELEMENTS
| Period (P) | 56.28y | ± 0.02 |
Periastron (T) | 1891.73y | ± 0.05 |
Semi-major axis (a) | 0.37a | ± 0.03 |
| Eccentricity (e) | 0.23 | ± 0.01 |
Inclination (i) | 67.58° | ± 0.72 |
Longitude of periastron (ω) | 167.82° | ± 0.4 |
| Node (Ω) | 62.56° | ± 1.71 |
Notes | | |
Reference | EEA2021 | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
213.4 |
0.194 |
| 2001 |
221.0 |
0.220 |
| 2002 |
227.1 |
0.243 |
| 2003 |
232.2 |
0.262 |
| 2004 |
236.6 |
0.276 |
| 2005 |
240.8 |
0.285 |
| 2006 |
244.7 |
0.286 |
| 2007 |
248.7 |
0.282 |
| 2008 |
253.0 |
0.272 |
| 2009 |
257.6 |
0.257 |
| 2010 |
262.9 |
0.238 |
| 2011 |
269.3 |
0.216 |
| 2012 |
277.0 |
0.193 |
| 2013 |
286.8 |
0.172 |
| 2014 |
299.2 |
0.154 |
| 2015 |
314.1 |
0.143 |
| 2016 |
330.6 |
0.140 |
| 2017 |
346.5 |
0.147 |
| 2018 |
0.1 |
0.163 |
| 2019 |
11.0 |
0.184 |
| 2020 |
19.5 |
0.208 |
| 2021 |
26.2 |
0.234 |
| 2022 |
31.5 |
0.261 |
| 2023 |
35.8 |
0.287 |
| 2024 |
39.5 |
0.312 |
| 2025 |
42.6 |
0.336 |
| 2026 |
45.3 |
0.358 |
| 2027 |
47.7 |
0.378 |
| 2028 |
49.9 |
0.396 |
| 2029 |
51.8 |
0.411 |
| 2030 |
53.7 |
0.424 |
| 2031 |
55.5 |
0.435 |
| 2032 |
57.1 |
0.444 |
| 2033 |
58.8 |
0.449 |
| 2034 |
60.4 |
0.452 |
| 2035 |
62.0 |
0.453 |
| 2036 |
63.6 |
0.450 |
| 2037 |
65.2 |
0.445 |
| 2038 |
66.8 |
0.437 |
| 2039 |
68.6 |
0.427 |
| 2040 |
70.4 |
0.413 |
| 2041 |
72.4 |
0.397 |
| 2042 |
74.6 |
0.378 |
| 2043 |
77.0 |
0.357 |
| 2044 |
79.7 |
0.333 |
| 2045 |
82.9 |
0.307 |
| 2046 |
86.7 |
0.280 |
| 2047 |
91.3 |
0.250 |
| 2048 |
97.2 |
0.221 |
| 2049 |
104.9 |
0.191 |
| 2050 |
115.3 |
0.164 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
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