19420+4015 KUI 94 (HD 186307)
19h 41m 57.63s +40° 15' 14.6" P.A. 158.00 sep 0.5 mag 6.50,7.80 Sp A6V dist. 81.57 pc (266.08 l.y.)
Coord 2000 |
19420+4015 |
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Discov num |
KUI 94 |
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Comp |
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Coord arcsec 2000 |
19 41 57.63 +40 15 14.6 |
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Date first |
1937 |
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Date last |
2014 |
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Obs |
67 |
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Pa first |
160 |
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Pa last |
157.9 |
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P.A. Now (θ) |
153° |
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Sep first |
0.5 |
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Sep last |
0.467 |
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Sep. Now (ρ) |
0.448" |
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Mag pri |
6.50 |
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Mag sec |
7.80 |
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delta mag (ΔM) |
1.3 |
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Spectral class |
A6V (white) |
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Pri motion ra |
-010 |
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Sec motion ra |
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Pri motion dec |
+030 |
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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 |
HD 186307 |
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Constellation |
Cygnus |
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SAO |
48737 |
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HIP |
96907 |
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Tycho2 |
3140-02348-1 |
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Gaia DR2 |
2076394762376371200 |
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HD |
186307 |
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HR |
7499 |
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GC |
27275 |
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BD |
BD+39 3878 |
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Distance |
81.57 |
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Distance ly |
266.08 |
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ORBITAL ELEMENTS
Period (P) | 79y | |
Periastron (T) | 1981y | |
Semi-major axis (a) | 0.34a | |
Eccentricity (e) | 0.38 | |
Inclination (i) | 106° | |
Longitude of periastron (ω) | 12° | |
Node (Ω) | 338° | |
Notes | n | |
Reference | Sod1999 | |
Equinox | 2000 | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
171.2 |
0.296 |
2001 |
169.8 |
0.315 |
2002 |
168.5 |
0.334 |
2003 |
167.4 |
0.351 |
2004 |
166.3 |
0.366 |
2005 |
165.4 |
0.381 |
2006 |
164.5 |
0.395 |
2007 |
163.6 |
0.407 |
2008 |
162.8 |
0.418 |
2009 |
162.1 |
0.428 |
2010 |
161.4 |
0.436 |
2011 |
160.7 |
0.444 |
2012 |
160.0 |
0.450 |
2013 |
159.4 |
0.456 |
2014 |
158.7 |
0.460 |
2015 |
158.1 |
0.463 |
2016 |
157.5 |
0.465 |
2017 |
156.8 |
0.465 |
2018 |
156.2 |
0.465 |
2019 |
155.6 |
0.464 |
2020 |
155.0 |
0.461 |
2021 |
154.3 |
0.458 |
2022 |
153.7 |
0.453 |
2023 |
153.0 |
0.448 |
2024 |
152.3 |
0.441 |
2025 |
151.6 |
0.434 |
2026 |
150.9 |
0.425 |
2027 |
150.1 |
0.415 |
2028 |
149.4 |
0.405 |
2029 |
148.5 |
0.393 |
2030 |
147.6 |
0.381 |
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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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