19082-0520 RST 4618 (HD 178286)
19h 08m 14.39s -05° 19' 57.8" P.A. 291.00 sep 0.2 mag 8.60,8.80 Sp A3 dist. 198.81 pc (648.52 l.y.)
Coord 2000 |
19082-0520 |
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Discov num |
RST4618 |
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Comp |
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Coord arcsec 2000 |
19 08 14.39 -05 19 57.8 |
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Date first |
1938 |
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Date last |
2021 |
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Obs |
15 |
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Pa first |
324 |
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Pa last |
290.6 |
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P.A. Now (θ) |
290.6° |
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Sep first |
0.4 |
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Sep last |
0.215 |
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Sep. Now (ρ) |
0.215" |
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Mag pri |
8.60 |
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Mag sec |
8.80 |
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delta mag (ΔM) |
0.2 |
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Spectral class |
A3 (white) |
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Pri motion ra |
+011 |
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Sec motion ra |
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Pri motion dec |
-004 |
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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 178286 |
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Constellation |
Aquila |
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SAO |
143061 |
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HIP |
93991 |
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Tycho2 |
5137-01309-1 |
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Gaia DR2 |
4206281100421616512 |
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HD |
178286 |
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GC |
26341 |
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BD |
BD-05 4884 |
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Distance |
198.81 |
|
Distance ly |
648.52 |
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ORBITAL ELEMENTS
Period (P) | 137y | ± 15 |
Periastron (T) | 1984.44y | ± 0.59 |
Semi-major axis (a) | 0.206a | ± 0.013 |
Eccentricity (e) | 0.593 | ± 0.034 |
Inclination (i) | 58.4° | ± 2 |
Longitude of periastron (ω) | 163° | ± 5.3 |
Node (Ω) | 319.8° | ± 3.2 |
Notes | | |
Reference | Tok2021f | |
Equinox | | |
Last observation | 2021 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
238.9 |
0.091 |
2001 |
244.3 |
0.095 |
2002 |
249.2 |
0.100 |
2003 |
253.7 |
0.106 |
2004 |
257.6 |
0.112 |
2005 |
261.2 |
0.118 |
2006 |
264.4 |
0.124 |
2007 |
267.3 |
0.130 |
2008 |
269.9 |
0.137 |
2009 |
272.3 |
0.143 |
2010 |
274.5 |
0.150 |
2011 |
276.6 |
0.156 |
2012 |
278.4 |
0.162 |
2013 |
280.1 |
0.168 |
2014 |
281.7 |
0.175 |
2015 |
283.2 |
0.181 |
2016 |
284.6 |
0.187 |
2017 |
285.9 |
0.192 |
2018 |
287.2 |
0.198 |
2019 |
288.3 |
0.204 |
2020 |
289.4 |
0.209 |
2021 |
290.5 |
0.215 |
2022 |
291.5 |
0.220 |
2023 |
292.4 |
0.225 |
2024 |
293.3 |
0.230 |
2025 |
294.2 |
0.235 |
2026 |
295.0 |
0.240 |
2027 |
295.8 |
0.245 |
2028 |
296.6 |
0.249 |
2029 |
297.4 |
0.254 |
2030 |
298.1 |
0.258 |
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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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