19471-1953 BU 146 (HD 186752)
19h 47m 06.75s -19° 52' 50.4" P.A. 78.00 sep 0.5 mag 8.61,9.52 Sp G1/2V dist. 96.53 pc (314.88 l.y.)
Coord 2000 |
19471-1953 |
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Discov num |
BU 146 |
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Comp |
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Coord arcsec 2000 |
19 47 06.75 -19 52 50.4 |
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Date first |
1873 |
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Date last |
2021 |
|
Obs |
35 |
|
Pa first |
290 |
|
Pa last |
78.3 |
|
P.A. Now (θ) |
78.3° |
|
Sep first |
1.0 |
|
Sep last |
0.513 |
|
Sep. Now (ρ) |
0.513" |
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Mag pri |
8.61 |
|
Mag sec |
9.52 |
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delta mag (ΔM) |
0.91 |
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Spectral class |
G1/2V (yellow) |
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Pri motion ra |
-044 |
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Sec motion ra |
-044 |
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Pri motion dec |
-033 |
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Sec motion dec |
-033 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 186752 |
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Constellation |
Sagittarius |
|
SAO |
188563 |
|
HIP |
97348 |
|
Tycho2 |
6320-00835-1 |
|
Gaia DR2 |
6868665223370895232 |
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HD |
186752 |
|
ADS |
12909 |
|
BD |
BD-20 5705 |
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Distance |
96.53 |
|
Distance ly |
314.88 |
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ORBITAL ELEMENTS SOLUTION #1
Period (P) | 198.12y | |
Periastron (T) | 2198.94y | |
Semi-major axis (a) | 1.166a | |
Eccentricity (e) | 0.852 | |
Inclination (i) | 65.3° | |
Longitude of periastron (ω) | 271° | |
Node (Ω) | 220.6° | |
Notes | | |
Reference | Msn2019 | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
73.6 |
0.121 |
2001 |
150.9 |
0.076 |
2002 |
199.4 |
0.158 |
2003 |
213.3 |
0.243 |
2004 |
220.3 |
0.312 |
2005 |
225.0 |
0.367 |
2006 |
228.6 |
0.412 |
2007 |
231.5 |
0.450 |
2008 |
234.0 |
0.483 |
2009 |
236.2 |
0.511 |
2010 |
238.1 |
0.537 |
2011 |
239.9 |
0.559 |
2012 |
241.6 |
0.580 |
2013 |
243.2 |
0.599 |
2014 |
244.6 |
0.616 |
2015 |
246.0 |
0.631 |
2016 |
247.3 |
0.646 |
2017 |
248.6 |
0.659 |
2018 |
249.8 |
0.671 |
2019 |
251.0 |
0.683 |
2020 |
252.1 |
0.694 |
2021 |
253.3 |
0.704 |
2022 |
254.3 |
0.713 |
2023 |
255.4 |
0.722 |
2024 |
256.4 |
0.731 |
2025 |
257.4 |
0.739 |
2026 |
258.4 |
0.746 |
2027 |
259.3 |
0.753 |
2028 |
260.3 |
0.760 |
2029 |
261.2 |
0.766 |
2030 |
262.1 |
0.772 |
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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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ORBITAL ELEMENTS SOLUTION #2
Period (P) | 115.2y | ± 1.6 |
Periastron (T) | 1998.28y | ± 0.12 |
Semi-major axis (a) | 1.106a | ± 0.018 |
Eccentricity (e) | 0.8144 | ± 0.0058 |
Inclination (i) | 75.81° | ± 0.32 |
Longitude of periastron (ω) | 278.92° | ± 0.3 |
Node (Ω) | 34.32° | ± 0.25 |
Notes | | |
Reference | Mdz2021 | |
Equinox | | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
31.6 |
0.287 |
2001 |
36.7 |
0.371 |
2002 |
40.1 |
0.427 |
2003 |
42.8 |
0.466 |
2004 |
45.1 |
0.494 |
2005 |
47.3 |
0.515 |
2006 |
49.3 |
0.529 |
2007 |
51.2 |
0.539 |
2008 |
53.0 |
0.546 |
2009 |
54.8 |
0.550 |
2010 |
56.6 |
0.552 |
2011 |
58.4 |
0.552 |
2012 |
60.2 |
0.551 |
2013 |
62.0 |
0.549 |
2014 |
63.8 |
0.545 |
2015 |
65.6 |
0.541 |
2016 |
67.5 |
0.537 |
2017 |
69.4 |
0.532 |
2018 |
71.4 |
0.526 |
2019 |
73.3 |
0.521 |
2020 |
75.4 |
0.515 |
2021 |
77.4 |
0.509 |
2022 |
79.6 |
0.504 |
2023 |
81.7 |
0.498 |
2024 |
83.9 |
0.493 |
2025 |
86.2 |
0.487 |
2026 |
88.5 |
0.483 |
2027 |
90.9 |
0.478 |
2028 |
93.3 |
0.474 |
2029 |
95.7 |
0.470 |
2030 |
98.2 |
0.467 |
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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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