18570+3254 BU 648 AB
18h 57m 01.61s +32° 54' 04.6" P.A. 224.00 sep 1.1 mag 5.34,7.96 Sp G0V dist. 14.87 pc (48.51 l.y.)
| Coord 2000 |
18570+3254 |
|
Discov num |
BU 648 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 57 01.61 +32 54 04.6 |
|
| Date first |
1878 |
|
Date last |
2023 |
|
Obs |
435 |
|
| Pa first |
313 |
|
Pa last |
223.7 |
|
P.A. Now (θ) |
212.2° (calc) |
|
| Sep first |
0.6 |
|
Sep last |
1.11 |
|
Sep. Now (ρ) |
0.896" (calc) |
|
| Mag pri |
5.34 |
|
Mag sec |
7.96 |
|
delta mag (ΔM) |
2.62 |
|
Spectral class |
G0V (yellow) |
|
| Pri motion ra |
+203 |
|
Sec motion ra |
|
|
| Pri motion dec |
-144 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
18570+3254 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
67612 |
18 57 02 +32 54 05 |
BU 648 AB |
2023 |
435 |
224 |
1.1 |
5.34 |
7.96 |
2.62 |
Y |
<=== |
| Show |
HD 176051 |
67612 |
18 57 02 +32 54 05 |
BU 648 AB,C |
2015 |
10 |
293 |
76.3 |
5.22 |
11.00 |
5.78 |
|
|
| Show |
|
67612 |
18 57 02 +32 54 05 |
BU 648 AB,D |
2014 |
6 |
201 |
83.9 |
5.22 |
12.20 |
6.98 |
|
|
| Show |
|
67612 |
18 57 02 +32 54 05 |
BU 648 AE |
2015 |
8 |
318 |
124.8 |
5.34 |
12.50 |
7.16 |
|
|
| Show |
|
67612 |
18 57 02 +32 54 05 |
BU 648 AF |
2015 |
9 |
78 |
85.9 |
5.34 |
12.60 |
7.26 |
|
|
| Show |
|
67612 |
18 57 02 +32 54 05 |
BU 648 AG |
2015 |
2 |
117 |
2.1 |
5.34 |
|
|
|
|
| Show |
|
67612 |
18 57 02 +32 54 05 |
BU 648 AH |
2015 |
2 |
104 |
2.2 |
5.34 |
|
|
|
|
| Show |
|
67612 |
18 57 02 +32 54 05 |
BU 648 AI |
2015 |
2 |
89 |
3.3 |
5.34 |
|
|
|
|
| Show |
|
67612 |
18 57 02 +32 54 05 |
BU 648 AJ |
2015 |
2 |
105 |
4.3 |
5.34 |
|
|
|
|
Decuple system
9 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Lyra |
|
SAO |
67612 |
|
HIP |
93017 |
|
Tycho2 |
2643-03345-1 |
|
| Gaia DR2 |
2043885295912608512 |
|
HD |
176051 |
|
HR |
7162 |
|
ADS |
11871 |
|
| BD |
BD+32 3267 |
|
Distance |
14.87 |
|
Distance ly |
48.51 |
|
ORBITAL ELEMENTS
| Period (P) | 61.18y | |
Periastron (T) | 1971.82y | |
Semi-major axis (a) | 1.24a | |
| Eccentricity (e) | 0.249 | |
Inclination (i) | 115.1° | |
Longitude of periastron (ω) | 280.3° | |
| Node (Ω) | 49° | |
Notes | n | |
Reference | Doc2008f | |
| Equinox | 2000 | |
Last observation | 2004 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
315.5 |
0.655 |
| 2001 |
307.0 |
0.668 |
| 2002 |
298.9 |
0.691 |
| 2003 |
291.5 |
0.723 |
| 2004 |
284.7 |
0.762 |
| 2005 |
278.7 |
0.807 |
| 2006 |
273.3 |
0.855 |
| 2007 |
268.5 |
0.905 |
| 2008 |
264.2 |
0.956 |
| 2009 |
260.3 |
1.006 |
| 2010 |
256.8 |
1.054 |
| 2011 |
253.6 |
1.100 |
| 2012 |
250.7 |
1.142 |
| 2013 |
247.9 |
1.179 |
| 2014 |
245.3 |
1.210 |
| 2015 |
242.8 |
1.235 |
| 2016 |
240.4 |
1.254 |
| 2017 |
238.1 |
1.264 |
| 2018 |
235.8 |
1.266 |
| 2019 |
233.4 |
1.258 |
| 2020 |
231.1 |
1.240 |
| 2021 |
228.6 |
1.212 |
| 2022 |
226.0 |
1.172 |
| 2023 |
223.2 |
1.121 |
| 2024 |
220.0 |
1.057 |
| 2025 |
216.5 |
0.982 |
| 2026 |
212.2 |
0.896 |
| 2027 |
207.1 |
0.800 |
| 2028 |
200.4 |
0.698 |
| 2029 |
191.4 |
0.594 |
| 2030 |
178.8 |
0.498 |
| 2031 |
161.0 |
0.425 |
| 2032 |
138.5 |
0.396 |
| 2033 |
115.8 |
0.423 |
| 2034 |
97.8 |
0.494 |
| 2035 |
84.9 |
0.588 |
| 2036 |
75.8 |
0.690 |
| 2037 |
68.9 |
0.788 |
| 2038 |
63.6 |
0.879 |
| 2039 |
59.2 |
0.958 |
| 2040 |
55.4 |
1.024 |
| 2041 |
52.0 |
1.076 |
| 2042 |
48.9 |
1.114 |
| 2043 |
46.0 |
1.140 |
| 2044 |
43.2 |
1.153 |
| 2045 |
40.4 |
1.155 |
| 2046 |
37.6 |
1.146 |
| 2047 |
34.7 |
1.128 |
| 2048 |
31.7 |
1.102 |
| 2049 |
28.6 |
1.070 |
| 2050 |
25.2 |
1.032 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
