20450+1244 BU 64 AB (HD 197683)
20h 45m 00.23s +12° 43' 36.5" P.A. 174.00 sep 0.7 mag 9.14,8.56 Sp G dist. 106.5 pc (347.4 l.y.)
| Coord 2000 |
20450+1244 |
|
Discov num |
BU 64 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 45 00.23 +12 43 36.5 |
|
| Date first |
1872 |
|
Date last |
2016 |
|
Obs |
165 |
|
| Pa first |
350 |
|
Pa last |
174.1 |
|
P.A. Now (θ) |
174.1° |
|
| Sep first |
0.8 |
|
Sep last |
0.68 |
|
Sep. Now (ρ) |
0.68" |
|
| Mag pri |
9.14 |
|
Mag sec |
8.56 |
|
delta mag (ΔM) |
0.58 |
|
Spectral class |
G (yellow) |
|
| Pri motion ra |
-011 |
|
Sec motion ra |
-011 |
|
| Pri motion dec |
-004 |
|
Sec motion dec |
-004 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
20450+1244 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 197683 |
106446 |
20 45 00 +12 43 36 |
BU 64 AB |
2016 |
165 |
174 |
0.7 |
9.14 |
8.56 |
0.58 |
Y |
<=== |
| Show |
|
106447 |
20 45 00 +12 43 36 |
STTA 209 AC |
2016 |
35 |
155 |
97.2 |
9.14 |
8.17 |
0.97 |
|
|
| Show |
|
|
20 45 00 +12 43 36 |
BU 64 AD |
2016 |
18 |
117 |
64.3 |
9.14 |
11.06 |
1.92 |
|
|
| Show |
|
106447 |
20 45 03 +12 42 08 |
D 32 CD |
2016 |
12 |
15 |
60.8 |
8.17 |
11.06 |
2.89 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 197683 |
|
Constellation |
Delphinus |
|
SAO |
106446 |
|
HIP |
102398 |
|
| Tycho2 |
1097-00941-1 |
|
Gaia DR2 |
1755189375364309504 |
|
HD |
197683 |
|
ADS |
14238 |
|
| BD |
BD+12 4452 |
|
Distance |
106.5 |
|
Distance ly |
347.4 |
|
ORBITAL ELEMENTS
| Period (P) | 2559.04y | |
Periastron (T) | 1951.41y | |
Semi-major axis (a) | 2.677a | |
| Eccentricity (e) | 0.805 | |
Inclination (i) | 75.1° | |
Longitude of periastron (ω) | 138.6° | |
| Node (Ω) | 159.3° | |
Notes | n | |
Reference | USN2007a | |
| Equinox | 2000 | |
Last observation | 2001 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
350.0 |
0.660 |
| 2001 |
350.4 |
0.660 |
| 2002 |
350.7 |
0.660 |
| 2003 |
351.1 |
0.659 |
| 2004 |
351.4 |
0.659 |
| 2005 |
351.8 |
0.659 |
| 2006 |
352.1 |
0.658 |
| 2007 |
352.5 |
0.658 |
| 2008 |
352.8 |
0.657 |
| 2009 |
353.2 |
0.656 |
| 2010 |
353.5 |
0.655 |
| 2011 |
353.9 |
0.654 |
| 2012 |
354.3 |
0.653 |
| 2013 |
354.6 |
0.652 |
| 2014 |
355.0 |
0.651 |
| 2015 |
355.4 |
0.650 |
| 2016 |
355.7 |
0.649 |
| 2017 |
356.1 |
0.647 |
| 2018 |
356.5 |
0.646 |
| 2019 |
356.8 |
0.644 |
| 2020 |
357.2 |
0.643 |
| 2021 |
357.6 |
0.641 |
| 2022 |
357.9 |
0.639 |
| 2023 |
358.3 |
0.638 |
| 2024 |
358.7 |
0.636 |
| 2025 |
359.1 |
0.634 |
| 2026 |
359.5 |
0.633 |
| 2027 |
359.8 |
0.631 |
| 2028 |
0.2 |
0.629 |
| 2029 |
0.6 |
0.627 |
| 2030 |
1.0 |
0.625 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
