18570+3254 BU 648 AB
18h 57m 01.61s +32° 54' 04.6" P.A. 232.00 sep 1.2 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 |
2020 |
|
Obs |
429 |
|
| Pa first |
313 |
|
Pa last |
231.6 |
|
P.A. Now (θ) |
225.4° |
|
| Sep first |
0.6 |
|
Sep last |
1.24 |
|
Sep. Now (ρ) |
1.217" |
|
| 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 |
2020 |
429 |
232 |
1.2 |
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 |
|
|
Sextuple system
7 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 |
|
GC |
26030 |
|
| ADS |
11871 |
|
GL |
Gl 738A |
|
BD |
BD+32 3267 |
|
Distance |
14.87 |
|
| Distance ly |
48.51 |
|
ORBITAL ELEMENTS
| Period (P) | 63.2489y | ± 3.0169 |
Periastron (T) | 1972.7274y | ± 1.0996 |
Semi-major axis (a) | 1.24739a | ± 0.01764 |
| Eccentricity (e) | 0.21805 | ± 0.0524 |
Inclination (i) | 115.743° | ± 1.814 |
Longitude of periastron (ω) | 288.164° | ± 9.91 |
| Node (Ω) | 49.397° | ± 0.773 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
315.4 |
0.654 |
| 2001 |
306.8 |
0.669 |
| 2002 |
298.7 |
0.694 |
| 2003 |
291.2 |
0.728 |
| 2004 |
284.5 |
0.770 |
| 2005 |
278.5 |
0.817 |
| 2006 |
273.2 |
0.867 |
| 2007 |
268.5 |
0.919 |
| 2008 |
264.3 |
0.971 |
| 2009 |
260.5 |
1.023 |
| 2010 |
257.1 |
1.073 |
| 2011 |
254.0 |
1.120 |
| 2012 |
251.1 |
1.164 |
| 2013 |
248.4 |
1.203 |
| 2014 |
245.9 |
1.237 |
| 2015 |
243.5 |
1.266 |
| 2016 |
241.2 |
1.288 |
| 2017 |
239.0 |
1.303 |
| 2018 |
236.8 |
1.311 |
| 2019 |
234.6 |
1.311 |
| 2020 |
232.4 |
1.301 |
| 2021 |
230.2 |
1.283 |
| 2022 |
227.8 |
1.255 |
| 2023 |
225.4 |
1.217 |
| 2024 |
222.7 |
1.169 |
| 2025 |
219.9 |
1.111 |
| 2026 |
216.6 |
1.043 |
| 2027 |
212.9 |
0.965 |
| 2028 |
208.5 |
0.880 |
| 2029 |
203.1 |
0.787 |
| 2030 |
196.2 |
0.692 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 18570+3254 BU 648 B |
| coord_arcsec_2000 | 185701.47+325405.8 |
| Period (P) | 1016d (2.78y) | ± 40 |
Periastron (T) | 53583m (2005.583y) | ± 39 |
Semi-major axis (a) | 0.241m | ± 0.041 |
| Eccentricity (e) | 0 | |
Inclination (i) | 115.8° | ± 8.2 |
Longitude of periastron (ω) | 0° | |
| Node (Ω) | 69° | ± 11 |
Notes | n | |
Reference | Mut2010e | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
70.1 |
|
| 2001-01-01 |
279.1 |
|
| 2002-01-01 |
188.3 |
|
| 2003-01-01 |
57.2 |
|
| 2004-01-01 |
260.4 |
|
| 2005-01-01 |
128.2 |
|
| 2006-01-01 |
38.1 |
|
| 2007-01-01 |
247.5 |
|
| 2008-01-01 |
94.2 |
|
| 2009-01-01 |
356.4 |
|
| 2010-01-01 |
234.0 |
|
| 2011-01-01 |
77.5 |
|
| 2012-01-01 |
298.4 |
|
| 2013-01-01 |
212.1 |
|
| 2014-01-01 |
64.9 |
|
| 2015-01-01 |
269.9 |
|
| 2016-01-01 |
163.3 |
|
| 2017-01-01 |
50.5 |
|
| 2018-01-01 |
254.8 |
|
| 2019-01-01 |
110.3 |
|
| 2020-01-01 |
24.9 |
|
| 2021-01-01 |
242.2 |
|
| 2022-01-01 |
86.2 |
|
| 2023-01-01 |
329.8 |
|
| 2024-01-01 |
226.6 |
|
| 2025-01-01 |
72.1 |
|
| 2026-01-01 |
283.5 |
|
| 2027-01-01 |
196.2 |
|
| 2028-01-01 |
59.5 |
|
| 2029-01-01 |
262.8 |
|
| 2030-01-01 |
137.0 |
|
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
