23176-0131 BU 79 AB (HD 219657)
23h 17m 37.61s -01° 31' 18.2" P.A. 7.00 sep 1.7 mag 8.23,9.59 Sp G5 dist. 63.01 pc (205.54 l.y.)
| Coord 2000 |
23176-0131 |
|
Discov num |
BU 79 |
|
Comp |
AB |
|
Coord arcsec 2000 |
23 17 37.61 -01 31 18.2 |
|
| Date first |
1872 |
|
Date last |
2021 |
|
Obs |
142 |
|
| Pa first |
120 |
|
Pa last |
6.5 |
|
P.A. Now (θ) |
9.2° |
|
| Sep first |
1.0 |
|
Sep last |
1.681 |
|
Sep. Now (ρ) |
1.676" |
|
| Mag pri |
8.23 |
|
Mag sec |
9.59 |
|
delta mag (ΔM) |
1.36 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+258 |
|
Sec motion ra |
+255 |
|
| Pri motion dec |
-093 |
|
Sec motion dec |
-093 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.011 (< 0.3, Physical double)
This double is physical.
23176-0131 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 219657 |
146617 |
23 17 38 -01 31 18 |
BU 79 AB |
2021 |
142 |
7 |
1.7 |
8.23 |
9.59 |
1.36 |
Y |
<=== |
| Show |
|
146617 |
23 17 38 -01 31 18 |
BU 79 AC |
2015 |
7 |
156 |
15.3 |
8.23 |
15.60 |
7.37 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 219657 |
|
Constellation |
Pisces |
|
SAO |
146617 |
|
HIP |
115012 |
|
| Tycho2 |
5243-01271-1 |
|
Gaia DR2 |
2638707510140277632 |
|
HD |
219657 |
|
GC |
32420 |
|
| ADS |
16649 |
|
BD |
BD-02 5920 |
|
Distance |
63.01 |
|
Distance ly |
205.54 |
|
ORBITAL ELEMENTS
| Period (P) | 302y | |
Periastron (T) | 2112y | |
Semi-major axis (a) | 1.32a | |
| Eccentricity (e) | 0.451 | |
Inclination (i) | 123.6° | |
Longitude of periastron (ω) | 303° | |
| Node (Ω) | 172.8° | |
Notes | n | |
Reference | WSI2004b | |
| Equinox | 2000 | |
Last observation | 2003 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
15.2 |
1.581 |
| 2001 |
14.7 |
1.583 |
| 2002 |
14.3 |
1.586 |
| 2003 |
13.9 |
1.588 |
| 2004 |
13.5 |
1.590 |
| 2005 |
13.1 |
1.592 |
| 2006 |
12.7 |
1.593 |
| 2007 |
12.3 |
1.595 |
| 2008 |
11.9 |
1.596 |
| 2009 |
11.5 |
1.597 |
| 2010 |
11.1 |
1.597 |
| 2011 |
10.7 |
1.598 |
| 2012 |
10.3 |
1.598 |
| 2013 |
9.9 |
1.599 |
| 2014 |
9.5 |
1.598 |
| 2015 |
9.1 |
1.598 |
| 2016 |
8.7 |
1.598 |
| 2017 |
8.3 |
1.597 |
| 2018 |
7.9 |
1.596 |
| 2019 |
7.5 |
1.595 |
| 2020 |
7.1 |
1.593 |
| 2021 |
6.7 |
1.591 |
| 2022 |
6.3 |
1.589 |
| 2023 |
5.9 |
1.587 |
| 2024 |
5.5 |
1.585 |
| 2025 |
5.0 |
1.582 |
| 2026 |
4.6 |
1.579 |
| 2027 |
4.2 |
1.576 |
| 2028 |
3.8 |
1.572 |
| 2029 |
3.4 |
1.568 |
| 2030 |
3.0 |
1.564 |
| 2031 |
2.6 |
1.560 |
| 2032 |
2.1 |
1.555 |
| 2033 |
1.7 |
1.550 |
| 2034 |
1.3 |
1.545 |
| 2035 |
0.8 |
1.539 |
| 2036 |
0.4 |
1.534 |
| 2037 |
360.0 |
1.527 |
| 2038 |
359.5 |
1.521 |
| 2039 |
359.1 |
1.514 |
| 2040 |
358.6 |
1.507 |
| 2041 |
358.2 |
1.500 |
| 2042 |
357.7 |
1.492 |
| 2043 |
357.3 |
1.484 |
| 2044 |
356.8 |
1.475 |
| 2045 |
356.3 |
1.466 |
| 2046 |
355.8 |
1.457 |
| 2047 |
355.4 |
1.448 |
| 2048 |
354.9 |
1.438 |
| 2049 |
354.4 |
1.427 |
| 2050 |
353.9 |
1.417 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
