17403+6341 STF 2218 (HD 161285)
17h 40m 18.07s +63° 40' 31.4" P.A. 310.00 sep 1.5 mag 7.08,8.37 Sp F8V dist. 68.49 pc (223.41 l.y.)
Coord 2000 |
17403+6341 |
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Discov num |
STF2218 |
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Comp |
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Coord arcsec 2000 |
17 40 18.07 +63 40 31.4 |
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Date first |
1831 |
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Date last |
2016 |
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Obs |
169 |
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Pa first |
0 |
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Pa last |
309.5 |
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P.A. Now (θ) |
309.5° |
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Sep first |
2.8 |
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Sep last |
1.473 |
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Sep. Now (ρ) |
1.473" |
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Mag pri |
7.08 |
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Mag sec |
8.37 |
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delta mag (ΔM) |
1.29 |
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Spectral class |
F8V (yellow-white) |
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Pri motion ra |
+006 |
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Sec motion ra |
+006 |
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Pri motion dec |
+140 |
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Sec motion dec |
+140 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 161285 |
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Constellation |
Draco |
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SAO |
17599 |
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HIP |
86482 |
|
Tycho2 |
4203-01438-1 |
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Gaia DR2 |
1440606660430810240 |
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HD |
161285 |
|
GC |
24017 |
|
ADS |
10728 |
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BD |
BD+63 1371 |
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Distance |
68.49 |
|
Distance ly |
223.41 |
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ORBITAL ELEMENTS
Period (P) | 1051.1579y | ± 490.04 |
Periastron (T) | 2080.8913y | ± 23.2432 |
Semi-major axis (a) | 3.04833a | ± 1.33201 |
Eccentricity (e) | 0.82722 | ± 0.14405 |
Inclination (i) | 120.982° | ± 13.732 |
Longitude of periastron (ω) | 254.754° | ± 10.937 |
Node (Ω) | 93.827° | ± 22.742 |
Notes | | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
315.7 |
1.546 |
2001 |
315.3 |
1.540 |
2002 |
314.9 |
1.534 |
2003 |
314.5 |
1.527 |
2004 |
314.1 |
1.521 |
2005 |
313.7 |
1.514 |
2006 |
313.3 |
1.508 |
2007 |
312.9 |
1.501 |
2008 |
312.5 |
1.494 |
2009 |
312.1 |
1.487 |
2010 |
311.7 |
1.480 |
2011 |
311.3 |
1.473 |
2012 |
310.8 |
1.466 |
2013 |
310.4 |
1.459 |
2014 |
310.0 |
1.452 |
2015 |
309.5 |
1.444 |
2016 |
309.1 |
1.437 |
2017 |
308.6 |
1.429 |
2018 |
308.2 |
1.422 |
2019 |
307.7 |
1.414 |
2020 |
307.3 |
1.406 |
2021 |
306.8 |
1.398 |
2022 |
306.3 |
1.390 |
2023 |
305.9 |
1.382 |
2024 |
305.4 |
1.374 |
2025 |
304.9 |
1.365 |
2026 |
304.4 |
1.357 |
2027 |
303.9 |
1.348 |
2028 |
303.4 |
1.339 |
2029 |
302.9 |
1.330 |
2030 |
302.3 |
1.321 |
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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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