23078+1240 BU 1025 AB (HD 218430)
23h 07m 48.16s +12° 40' 23.5" P.A. 329.00 sep 0.8 mag 7.77,9.75 Sp A9III dist. 133.87 pc (436.68 l.y.)
| Coord 2000 |
23078+1240 |
|
Discov num |
BU 1025 |
|
Comp |
AB |
|
Coord arcsec 2000 |
23 07 48.16 +12 40 23.5 |
|
| Date first |
1891 |
|
Date last |
2016 |
|
Obs |
38 |
|
| Pa first |
269 |
|
Pa last |
329 |
|
P.A. Now (θ) |
329° |
|
| Sep first |
0.8 |
|
Sep last |
0.762 |
|
Sep. Now (ρ) |
0.762" |
|
| Mag pri |
7.77 |
|
Mag sec |
9.75 |
|
delta mag (ΔM) |
1.98 |
|
Spectral class |
A9III (white) |
|
| Pri motion ra |
-017 |
|
Sec motion ra |
-017 |
|
| Pri motion dec |
-014 |
|
Sec motion dec |
-014 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
23078+1240 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 218430 |
108415 |
23 07 48 +12 40 24 |
BU 1025 AB |
2016 |
38 |
329 |
0.8 |
7.77 |
9.75 |
1.98 |
Y |
<=== |
| Show |
|
108415 |
23 07 48 +12 40 24 |
BU 1025 AC |
2014 |
16 |
84 |
21.7 |
7.77 |
11.70 |
3.93 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 218430 |
|
Constellation |
Pegasus |
|
SAO |
108415 |
|
HIP |
114215 |
|
| Tycho2 |
1166-01376-1 |
|
Gaia DR2 |
2811891384767367296 |
|
HD |
218430 |
|
ADS |
16524 |
|
| BD |
BD+11 4940 |
|
Distance |
133.87 |
|
Distance ly |
436.68 |
|
ORBITAL ELEMENTS
| Period (P) | 1167.0044y | ± 591.757 |
Periastron (T) | 1845.3886y | ± 192.2763 |
Semi-major axis (a) | 2.57536a | ± 1.58238 |
| Eccentricity (e) | 0.84308 | ± 0.14692 |
Inclination (i) | 74.009° | ± 11.475 |
Longitude of periastron (ω) | 115.409° | ± 41.722 |
| Node (Ω) | 66.824° | ± 66.495 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2008 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
322.1 |
0.794 |
| 2001 |
322.5 |
0.795 |
| 2002 |
323.0 |
0.797 |
| 2003 |
323.5 |
0.798 |
| 2004 |
324.0 |
0.800 |
| 2005 |
324.4 |
0.801 |
| 2006 |
324.9 |
0.803 |
| 2007 |
325.4 |
0.805 |
| 2008 |
325.9 |
0.806 |
| 2009 |
326.3 |
0.808 |
| 2010 |
326.8 |
0.810 |
| 2011 |
327.2 |
0.812 |
| 2012 |
327.7 |
0.814 |
| 2013 |
328.2 |
0.815 |
| 2014 |
328.6 |
0.817 |
| 2015 |
329.1 |
0.819 |
| 2016 |
329.5 |
0.821 |
| 2017 |
330.0 |
0.823 |
| 2018 |
330.4 |
0.825 |
| 2019 |
330.9 |
0.828 |
| 2020 |
331.3 |
0.830 |
| 2021 |
331.7 |
0.832 |
| 2022 |
332.2 |
0.834 |
| 2023 |
332.6 |
0.836 |
| 2024 |
333.0 |
0.839 |
| 2025 |
333.5 |
0.841 |
| 2026 |
333.9 |
0.843 |
| 2027 |
334.3 |
0.846 |
| 2028 |
334.7 |
0.848 |
| 2029 |
335.2 |
0.850 |
| 2030 |
335.6 |
0.853 |
|
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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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