19394+2215 STF 2556 (HD 185661)
19h 39m 26.31s +22° 15' 23.4" P.A. 334.00 sep 0.4 mag 7.71,8.92 Sp F4IV dist. 147.28 pc (480.43 l.y.)
Coord 2000 |
19394+2215 |
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Discov num |
STF2556 |
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Comp |
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Coord arcsec 2000 |
19 39 26.31 +22 15 23.4 |
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Date first |
1829 |
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Date last |
2018 |
|
Obs |
203 |
|
Pa first |
188 |
|
Pa last |
334.4 |
|
P.A. Now (θ) |
334.4° |
|
Sep first |
0.6 |
|
Sep last |
0.421 |
|
Sep. Now (ρ) |
0.421" |
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Mag pri |
7.71 |
|
Mag sec |
8.92 |
|
delta mag (ΔM) |
1.21 |
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Spectral class |
F4IV (yellow-white) |
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Pri motion ra |
+003 |
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Sec motion ra |
+003 |
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Pri motion dec |
+013 |
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Sec motion dec |
+013 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 185661 |
|
Constellation |
Vulpecula |
|
SAO |
87508 |
|
HIP |
96691 |
|
Tycho2 |
1614-00138-1 |
|
HD |
185661 |
|
GC |
27199 |
|
ADS |
12752 |
|
BD |
BD+21 3862 |
|
Distance |
147.28 |
|
Distance ly |
480.43 |
|
ORBITAL ELEMENTS
Period (P) | 622.4y | |
Periastron (T) | 1970.31y | |
Semi-major axis (a) | 0.678a | |
Eccentricity (e) | 0.476 | |
Inclination (i) | 140.9° | |
Longitude of periastron (ω) | 356° | |
Node (Ω) | 44.5° | |
Notes | | |
Reference | Ari1999 | |
Equinox | 2000 | |
Last observation | 1997 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
5.3 |
0.358 |
2001 |
3.8 |
0.358 |
2002 |
2.4 |
0.359 |
2003 |
1.0 |
0.359 |
2004 |
359.6 |
0.359 |
2005 |
358.2 |
0.360 |
2006 |
356.8 |
0.360 |
2007 |
355.4 |
0.361 |
2008 |
354.0 |
0.362 |
2009 |
352.6 |
0.363 |
2010 |
351.3 |
0.363 |
2011 |
349.9 |
0.364 |
2012 |
348.5 |
0.365 |
2013 |
347.2 |
0.366 |
2014 |
345.8 |
0.367 |
2015 |
344.5 |
0.368 |
2016 |
343.2 |
0.370 |
2017 |
341.8 |
0.371 |
2018 |
340.5 |
0.372 |
2019 |
339.2 |
0.374 |
2020 |
337.9 |
0.375 |
2021 |
336.6 |
0.377 |
2022 |
335.4 |
0.379 |
2023 |
334.1 |
0.380 |
2024 |
332.9 |
0.382 |
2025 |
331.6 |
0.384 |
2026 |
330.4 |
0.386 |
2027 |
329.2 |
0.388 |
2028 |
328.0 |
0.390 |
2029 |
326.8 |
0.392 |
2030 |
325.6 |
0.395 |
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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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