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 |
|
Discov num |
BU 146 |
|
Comp |
|
|
Coord arcsec 2000 |
19 47 06.75 -19 52 50.4 |
|
| Date first |
1873 |
|
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" |
|
| Mag pri |
8.61 |
|
Mag sec |
9.52 |
|
delta mag (ΔM) |
0.91 |
|
Spectral class |
G1/2V (yellow) |
|
| Pri motion ra |
-044 |
|
Sec motion ra |
-044 |
|
| Pri motion dec |
-033 |
|
Sec motion dec |
-033 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 186752 |
|
Constellation |
Sagittarius |
|
SAO |
188563 |
|
HIP |
97348 |
|
| Tycho2 |
6320-00835-1 |
|
Gaia DR2 |
6868665223370895232 |
|
HD |
186752 |
|
ADS |
12909 |
|
| BD |
BD-20 5705 |
|
Distance |
96.53 |
|
Distance ly |
314.88 |
|
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 |
|
|
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 |
|
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 |
|
|
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 |
|
