18534+2553 A 2989 (HD 337117)
18h 53m 24.53s +25° 53' 05.3" P.A. 199.00 sep 0.3 mag 8.90,9.90 Sp F5
Coord 2000 |
18534+2553 |
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Discov num |
A 2989 |
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Comp |
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Coord arcsec 2000 |
18 53 24.53 +25 53 05.3 |
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Date first |
1916 |
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Date last |
2016 |
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Obs |
16 |
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Pa first |
227 |
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Pa last |
199.4 |
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P.A. Now (θ) |
199.4° |
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Sep first |
0.4 |
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Sep last |
0.309 |
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Sep. Now (ρ) |
0.309" |
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Mag pri |
8.90 |
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Mag sec |
9.90 |
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delta mag (ΔM) |
1 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
-052 |
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Sec motion ra |
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Pri motion dec |
-022 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 337117 |
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Constellation |
Hercules |
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SAO |
86545 |
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Tycho2 |
2113-01304-1 |
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Gaia DR2 |
4534878057425399296 |
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HD |
337117 |
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ADS |
11802 |
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ORBITAL ELEMENTS
Period (P) | 175y | |
Periastron (T) | 1968.3y | |
Semi-major axis (a) | 0.74a | |
Eccentricity (e) | 0.978 | |
Inclination (i) | 78.7° | |
Longitude of periastron (ω) | 281.3° | |
Node (Ω) | 80.9° | |
Notes | | |
Reference | USN2002 | |
Equinox | 2000 | |
Last observation | 1995 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
189.2 |
0.217 |
2001 |
190.2 |
0.222 |
2002 |
191.1 |
0.226 |
2003 |
192.0 |
0.231 |
2004 |
192.8 |
0.235 |
2005 |
193.7 |
0.239 |
2006 |
194.5 |
0.244 |
2007 |
195.2 |
0.248 |
2008 |
195.9 |
0.252 |
2009 |
196.7 |
0.257 |
2010 |
197.3 |
0.261 |
2011 |
198.0 |
0.265 |
2012 |
198.7 |
0.269 |
2013 |
199.3 |
0.273 |
2014 |
199.9 |
0.277 |
2015 |
200.5 |
0.281 |
2016 |
201.1 |
0.285 |
2017 |
201.6 |
0.289 |
2018 |
202.2 |
0.293 |
2019 |
202.7 |
0.297 |
2020 |
203.2 |
0.300 |
2021 |
203.7 |
0.304 |
2022 |
204.2 |
0.308 |
2023 |
204.7 |
0.311 |
2024 |
205.2 |
0.315 |
2025 |
205.6 |
0.318 |
2026 |
206.1 |
0.322 |
2027 |
206.5 |
0.325 |
2028 |
206.9 |
0.329 |
2029 |
207.4 |
0.332 |
2030 |
207.8 |
0.335 |
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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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