19520-1021 BU 148 AB (HD 187774)
19h 52m 01.89s -10° 21' 13.5" P.A. 219.00 sep 0.6 mag 7.74,8.41 Sp F2 dist. 86.96 pc (283.66 l.y.)
| Coord 2000 |
19520-1021 |
|
Discov num |
BU 148 |
|
Comp |
AB |
|
Coord arcsec 2000 |
19 52 01.89 -10 21 13.5 |
|
| Date first |
1873 |
|
Date last |
2021 |
|
Obs |
74 |
|
| Pa first |
310 |
|
Pa last |
219.4 |
|
P.A. Now (θ) |
219.4° |
|
| Sep first |
1.0 |
|
Sep last |
0.646 |
|
Sep. Now (ρ) |
0.646" |
|
| Mag pri |
7.74 |
|
Mag sec |
8.41 |
|
delta mag (ΔM) |
0.67 |
|
Spectral class |
F2 (yellow-white) |
|
| Pri motion ra |
-014 |
|
Sec motion ra |
-014 |
|
| Pri motion dec |
-049 |
|
Sec motion dec |
-049 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
19520-1021 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 187774 |
163059 |
19 52 02 -10 21 14 |
BU 148 AB |
2021 |
74 |
219 |
0.6 |
7.74 |
8.41 |
0.67 |
Y |
<=== |
| Show |
|
163059 |
19 52 02 -10 21 14 |
BU 148 AC |
2014 |
10 |
55 |
31.1 |
7.74 |
13.30 |
5.56 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 187774 |
|
Constellation |
Aquila |
|
SAO |
163059 |
|
HIP |
97766 |
|
| Tycho2 |
5729-01628-1 |
|
Gaia DR2 |
4190490812075716224 |
|
HD |
187774 |
|
ADS |
13028 |
|
| BD |
BD-10 5203 |
|
Distance |
86.96 |
|
Distance ly |
283.66 |
|
ORBITAL ELEMENTS
| Period (P) | 783.31y | |
Periastron (T) | 2032.84y | |
Semi-major axis (a) | 1.365a | |
| Eccentricity (e) | 0.62 | |
Inclination (i) | 120.5° | |
Longitude of periastron (ω) | 217.5° | |
| Node (Ω) | 38.1° | |
Notes | | |
Reference | Lin2004b | |
| Equinox | 2000 | |
Last observation | 2002 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
234.5 |
0.613 |
| 2001 |
233.6 |
0.612 |
| 2002 |
232.7 |
0.611 |
| 2003 |
231.8 |
0.609 |
| 2004 |
230.9 |
0.607 |
| 2005 |
229.9 |
0.605 |
| 2006 |
229.0 |
0.603 |
| 2007 |
228.1 |
0.601 |
| 2008 |
227.1 |
0.598 |
| 2009 |
226.1 |
0.596 |
| 2010 |
225.2 |
0.593 |
| 2011 |
224.2 |
0.589 |
| 2012 |
223.2 |
0.586 |
| 2013 |
222.2 |
0.582 |
| 2014 |
221.2 |
0.577 |
| 2015 |
220.2 |
0.573 |
| 2016 |
219.1 |
0.568 |
| 2017 |
218.1 |
0.563 |
| 2018 |
217.0 |
0.558 |
| 2019 |
215.9 |
0.552 |
| 2020 |
214.7 |
0.546 |
| 2021 |
213.6 |
0.539 |
| 2022 |
212.4 |
0.533 |
| 2023 |
211.2 |
0.526 |
| 2024 |
209.9 |
0.518 |
| 2025 |
208.6 |
0.511 |
| 2026 |
207.3 |
0.503 |
| 2027 |
205.9 |
0.494 |
| 2028 |
204.5 |
0.486 |
| 2029 |
203.0 |
0.477 |
| 2030 |
201.5 |
0.468 |
| 2031 |
199.9 |
0.459 |
| 2032 |
198.3 |
0.450 |
| 2033 |
196.5 |
0.440 |
| 2034 |
194.7 |
0.431 |
| 2035 |
192.9 |
0.421 |
| 2036 |
190.9 |
0.411 |
| 2037 |
188.8 |
0.402 |
| 2038 |
186.7 |
0.392 |
| 2039 |
184.4 |
0.383 |
| 2040 |
182.0 |
0.373 |
| 2041 |
179.5 |
0.365 |
| 2042 |
176.9 |
0.356 |
| 2043 |
174.1 |
0.348 |
| 2044 |
171.2 |
0.340 |
| 2045 |
168.2 |
0.333 |
| 2046 |
165.1 |
0.326 |
| 2047 |
161.8 |
0.320 |
| 2048 |
158.4 |
0.315 |
| 2049 |
155.0 |
0.311 |
| 2050 |
151.4 |
0.308 |
|
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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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