17457+1743 STF 2205 (HD 161585)
17h 45m 41.03s +17° 43' 00.7" P.A. 21.00 sep 0.8 mag 9.37,9.59 Sp K0.2V+K2V
| Coord 2000 |
17457+1743 |
|
Discov num |
STF2205 |
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Comp |
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Coord arcsec 2000 |
17 45 41.03 +17 43 00.7 |
|
| Date first |
1830 |
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Date last |
2021 |
|
Obs |
199 |
|
| Pa first |
291 |
|
Pa last |
20.7 |
|
P.A. Now (θ) |
20.7° |
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| Sep first |
2.5 |
|
Sep last |
0.793 |
|
Sep. Now (ρ) |
0.793" |
|
| Mag pri |
9.37 |
|
Mag sec |
9.59 |
|
delta mag (ΔM) |
0.22 |
|
Spectral class |
K0.2V+K2V (yellow-orange/yellow-orange) |
|
| Pri motion ra |
-025 |
|
Sec motion ra |
-025 |
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| Pri motion dec |
+074 |
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Sec motion dec |
+074 |
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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 161585 |
|
Constellation |
Hercules |
|
SAO |
103085 |
|
Tycho2 |
1556-00743-1 |
|
| Gaia DR2 |
4551173541294403328 |
|
HD |
161585 |
|
GC |
24106 |
|
ADS |
10769 |
|
ORBITAL ELEMENTS
| Period (P) | 600.4431y | ± 248.9038 |
Periastron (T) | 2030.0111y | ± 2.6119 |
Semi-major axis (a) | 2.58966a | ± 0.53544 |
| Eccentricity (e) | 0.81961 | ± 0.06253 |
Inclination (i) | 54.896° | ± 5.241 |
Longitude of periastron (ω) | 78.875° | ± 5.199 |
| Node (Ω) | 19.079° | ± 15.989 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
352.0 |
1.221 |
| 2001 |
352.9 |
1.204 |
| 2002 |
353.9 |
1.186 |
| 2003 |
354.8 |
1.168 |
| 2004 |
355.8 |
1.149 |
| 2005 |
356.8 |
1.129 |
| 2006 |
357.9 |
1.109 |
| 2007 |
359.0 |
1.088 |
| 2008 |
0.1 |
1.067 |
| 2009 |
1.3 |
1.044 |
| 2010 |
2.5 |
1.021 |
| 2011 |
3.9 |
0.997 |
| 2012 |
5.2 |
0.971 |
| 2013 |
6.7 |
0.945 |
| 2014 |
8.2 |
0.917 |
| 2015 |
9.8 |
0.888 |
| 2016 |
11.6 |
0.858 |
| 2017 |
13.4 |
0.826 |
| 2018 |
15.4 |
0.792 |
| 2019 |
17.7 |
0.756 |
| 2020 |
20.1 |
0.718 |
| 2021 |
22.8 |
0.678 |
| 2022 |
25.9 |
0.636 |
| 2023 |
29.4 |
0.591 |
| 2024 |
33.5 |
0.544 |
| 2025 |
38.4 |
0.495 |
| 2026 |
44.5 |
0.444 |
| 2027 |
52.0 |
0.394 |
| 2028 |
61.8 |
0.346 |
| 2029 |
74.3 |
0.306 |
| 2030 |
90.0 |
0.279 |
|
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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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