19070+1104 HEI 568 (18 Aql)
19h 06m 58.60s +11° 04' 16.7" P.A. 243.00 sep 0.3 mag 5.44,6.39 Sp B8III dist. 214.13 pc (698.49 l.y.)
Coord 2000 |
19070+1104 |
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Discov num |
HEI 568 |
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Comp |
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Coord arcsec 2000 |
19 06 58.60 +11 04 16.7 |
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Date first |
1987 |
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Date last |
2021 |
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Obs |
46 |
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Pa first |
320 |
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Pa last |
243.1 |
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P.A. Now (θ) |
243.1° |
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Sep first |
0.3 |
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Sep last |
0.256 |
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Sep. Now (ρ) |
0.256" |
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Mag pri |
5.44 |
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Mag sec |
6.39 |
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delta mag (ΔM) |
0.95 |
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Spectral class |
B8III (blue-white) |
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Pri motion ra |
+005 |
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Sec motion ra |
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Pri motion dec |
-026 |
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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
Name |
18 Aql |
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Var name |
Y Aql |
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Constellation |
Aquila |
|
SAO |
104488 |
|
HIP |
93867 |
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Tycho2 |
1044-01453-1 |
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Gaia DR2 |
4312637517357693696 |
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HD |
178125 |
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HR |
7248 |
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GC |
26315 |
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BD |
BD+10 3787 |
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Flamsteed |
18 Aquilae |
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Flamsteed name |
18 Aql |
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FK5 |
3525 |
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Distance |
214.13 |
|
Distance ly |
698.49 |
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ORBITAL ELEMENTS
Period (P) | 205.16y | |
Periastron (T) | 2014.6y | |
Semi-major axis (a) | 0.399a | |
Eccentricity (e) | 0.23 | |
Inclination (i) | 134.3° | |
Longitude of periastron (ω) | 201.4° | |
Node (Ω) | 94.5° | |
Notes | n | |
Reference | Zir2010 | |
Equinox | 2000 | |
Last observation | 2008 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
288.3 |
0.313 |
2001 |
286.3 |
0.313 |
2002 |
284.4 |
0.313 |
2003 |
282.5 |
0.313 |
2004 |
280.5 |
0.313 |
2005 |
278.6 |
0.313 |
2006 |
276.7 |
0.312 |
2007 |
274.7 |
0.311 |
2008 |
272.7 |
0.310 |
2009 |
270.8 |
0.309 |
2010 |
268.8 |
0.307 |
2011 |
266.7 |
0.305 |
2012 |
264.7 |
0.303 |
2013 |
262.6 |
0.301 |
2014 |
260.5 |
0.298 |
2015 |
258.3 |
0.295 |
2016 |
256.1 |
0.292 |
2017 |
253.9 |
0.289 |
2018 |
251.6 |
0.286 |
2019 |
249.2 |
0.283 |
2020 |
246.8 |
0.279 |
2021 |
244.4 |
0.276 |
2022 |
241.9 |
0.272 |
2023 |
239.3 |
0.269 |
2024 |
236.6 |
0.265 |
2025 |
233.9 |
0.262 |
2026 |
231.1 |
0.259 |
2027 |
228.2 |
0.255 |
2028 |
225.2 |
0.252 |
2029 |
222.2 |
0.250 |
2030 |
219.1 |
0.247 |
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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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