16384+3514 COU 985
16h 38m 24.13s +35° 13' 34.5" P.A. 81.00 sep 0.3 mag 9.40,9.70 Sp K2 dist. 87.95 pc (286.89 l.y.)
Coord 2000 |
16384+3514 |
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Discov num |
COU 985 |
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Comp |
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Coord arcsec 2000 |
16 38 24.13 +35 13 34.5 |
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Date first |
1973 |
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Date last |
2016 |
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Obs |
36 |
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Pa first |
48 |
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Pa last |
81.3 |
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P.A. Now (θ) |
271.5° |
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Sep first |
0.2 |
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Sep last |
0.334 |
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Sep. Now (ρ) |
0.334" |
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Mag pri |
9.40 |
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Mag sec |
9.70 |
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delta mag (ΔM) |
0.3 |
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Spectral class |
K2 (yellow-orange) |
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Pri motion ra |
+052 |
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Sec motion ra |
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Pri motion dec |
-089 |
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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 |
Hercules |
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HIP |
81470 |
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Tycho2 |
2588-00318-1 |
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Gaia DR2 |
1327584596036545536 |
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BD |
BD+35 2844 |
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Distance |
87.95 |
|
Distance ly |
286.89 |
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ORBITAL ELEMENTS
Period (P) | 81.97y | |
Periastron (T) | 1986.18y | |
Semi-major axis (a) | 0.282a | |
Eccentricity (e) | 0.27 | |
Inclination (i) | 59.1° | |
Longitude of periastron (ω) | 34.5° | |
Node (Ω) | 78.9° | |
Notes | n | |
Reference | Doc2019h | |
Equinox | 2000 | |
Last observation | 2012 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
223.5 |
0.189 |
2001 |
228.0 |
0.204 |
2002 |
231.9 |
0.219 |
2003 |
235.2 |
0.233 |
2004 |
238.2 |
0.247 |
2005 |
240.9 |
0.260 |
2006 |
243.4 |
0.272 |
2007 |
245.6 |
0.283 |
2008 |
247.7 |
0.293 |
2009 |
249.6 |
0.303 |
2010 |
251.5 |
0.311 |
2011 |
253.2 |
0.318 |
2012 |
254.9 |
0.324 |
2013 |
256.5 |
0.330 |
2014 |
258.1 |
0.334 |
2015 |
259.6 |
0.338 |
2016 |
261.1 |
0.340 |
2017 |
262.6 |
0.342 |
2018 |
264.0 |
0.343 |
2019 |
265.5 |
0.343 |
2020 |
267.0 |
0.342 |
2021 |
268.5 |
0.340 |
2022 |
270.0 |
0.337 |
2023 |
271.5 |
0.334 |
2024 |
273.1 |
0.330 |
2025 |
274.7 |
0.325 |
2026 |
276.3 |
0.320 |
2027 |
278.1 |
0.314 |
2028 |
279.8 |
0.307 |
2029 |
281.7 |
0.300 |
2030 |
283.7 |
0.292 |
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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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