19594+3206 A 378 (HD 189549)
19h 59m 22.02s +32° 06' 28.0" P.A. 294.00 sep 1.0 mag 8.48,8.98 Sp G5
| Coord 2000 |
19594+3206 |
|
Discov num |
A 378 |
|
Comp |
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Coord arcsec 2000 |
19 59 22.02 +32 06 28.0 |
|
| Date first |
1902 |
|
Date last |
2016 |
|
Obs |
44 |
|
| Pa first |
319 |
|
Pa last |
293.6 |
|
P.A. Now (θ) |
293.6° |
|
| Sep first |
0.4 |
|
Sep last |
0.974 |
|
Sep. Now (ρ) |
0.974" |
|
| Mag pri |
8.48 |
|
Mag sec |
8.98 |
|
delta mag (ΔM) |
0.5 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+002 |
|
Sec motion ra |
+002 |
|
| Pri motion dec |
-013 |
|
Sec motion dec |
-013 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 189549 |
|
Constellation |
Cygnus |
|
SAO |
69212 |
|
Tycho2 |
2674-01000-1 |
|
| Gaia DR2 |
2033994123703611136 |
|
HD |
189549 |
|
ADS |
13212 |
|
ORBITAL ELEMENTS
| Period (P) | 591.302y | ± 325.9371 |
Periastron (T) | 2060.8237y | ± 166.8133 |
Semi-major axis (a) | 1.57387a | ± 0.84266 |
| Eccentricity (e) | 0.70961 | ± 0.26477 |
Inclination (i) | 95.414° | ± 9.554 |
Longitude of periastron (ω) | 256.252° | ± 32.532 |
| Node (Ω) | 108.095° | ± 7.724 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2013 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
294.2 |
0.874 |
| 2001 |
294.1 |
0.875 |
| 2002 |
293.9 |
0.876 |
| 2003 |
293.8 |
0.877 |
| 2004 |
293.7 |
0.878 |
| 2005 |
293.6 |
0.878 |
| 2006 |
293.4 |
0.878 |
| 2007 |
293.3 |
0.878 |
| 2008 |
293.2 |
0.878 |
| 2009 |
293.0 |
0.878 |
| 2010 |
292.9 |
0.877 |
| 2011 |
292.8 |
0.876 |
| 2012 |
292.6 |
0.875 |
| 2013 |
292.5 |
0.874 |
| 2014 |
292.4 |
0.872 |
| 2015 |
292.2 |
0.870 |
| 2016 |
292.1 |
0.868 |
| 2017 |
292.0 |
0.866 |
| 2018 |
291.8 |
0.863 |
| 2019 |
291.7 |
0.860 |
| 2020 |
291.6 |
0.856 |
| 2021 |
291.4 |
0.853 |
| 2022 |
291.3 |
0.848 |
| 2023 |
291.2 |
0.844 |
| 2024 |
291.0 |
0.839 |
| 2025 |
290.9 |
0.834 |
| 2026 |
290.7 |
0.828 |
| 2027 |
290.6 |
0.821 |
| 2028 |
290.4 |
0.815 |
| 2029 |
290.3 |
0.807 |
| 2030 |
290.1 |
0.800 |
|
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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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