20269-3724 R 321 (HD 194433)
20h 26m 52.97s -37° 24' 10.6" P.A. 123.00 sep 1.6 mag 6.58,8.09 Sp K2IV+K1V dist. 37.33 pc (121.77 l.y.)
| Coord 2000 |
20269-3724 |
|
Discov num |
R 321 |
|
Comp |
|
|
Coord arcsec 2000 |
20 26 52.97 -37 24 10.6 |
|
| Date first |
1880 |
|
Date last |
2019 |
|
Obs |
71 |
|
| Pa first |
97 |
|
Pa last |
123 |
|
P.A. Now (θ) |
121.8° |
|
| Sep first |
1.1 |
|
Sep last |
1.58 |
|
Sep. Now (ρ) |
1.599" |
|
| Mag pri |
6.58 |
|
Mag sec |
8.09 |
|
delta mag (ΔM) |
1.51 |
|
Spectral class |
K2IV+K1V (yellow-orange/yellow-orange) |
|
| Pri motion ra |
-249 |
|
Sec motion ra |
-249 |
|
| Pri motion dec |
-114 |
|
Sec motion dec |
-114 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 194433 |
|
Constellation |
Sagittarius |
|
SAO |
212126 |
|
HIP |
100852 |
|
| Tycho2 |
7467-01373-1 |
|
Gaia DR2 |
6694723755167180160 |
|
HD |
194433 |
|
HR |
7808 |
|
| GC |
28425 |
|
CD |
CD-3713741 |
|
Distance |
37.33 |
|
Distance ly |
121.77 |
|
ORBITAL ELEMENTS
| Period (P) | 186.4192y | ± 5.9398 |
Periastron (T) | 1949.1982y | ± 0.1812 |
Semi-major axis (a) | 1.06149a | ± 0.01098 |
| Eccentricity (e) | 0.69564 | ± 0.00946 |
Inclination (i) | 139.301° | ± 1.541 |
Longitude of periastron (ω) | 227.418° | ± 2.218 |
| Node (Ω) | 152.349° | ± 1.626 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2013 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
133.2 |
1.469 |
| 2001 |
132.7 |
1.479 |
| 2002 |
132.1 |
1.488 |
| 2003 |
131.6 |
1.497 |
| 2004 |
131.1 |
1.506 |
| 2005 |
130.5 |
1.514 |
| 2006 |
130.0 |
1.522 |
| 2007 |
129.5 |
1.529 |
| 2008 |
129.0 |
1.536 |
| 2009 |
128.5 |
1.543 |
| 2010 |
128.0 |
1.549 |
| 2011 |
127.5 |
1.555 |
| 2012 |
127.0 |
1.560 |
| 2013 |
126.6 |
1.565 |
| 2014 |
126.1 |
1.570 |
| 2015 |
125.6 |
1.575 |
| 2016 |
125.1 |
1.579 |
| 2017 |
124.6 |
1.583 |
| 2018 |
124.2 |
1.586 |
| 2019 |
123.7 |
1.589 |
| 2020 |
123.2 |
1.592 |
| 2021 |
122.8 |
1.595 |
| 2022 |
122.3 |
1.597 |
| 2023 |
121.8 |
1.599 |
| 2024 |
121.4 |
1.600 |
| 2025 |
120.9 |
1.602 |
| 2026 |
120.5 |
1.603 |
| 2027 |
120.0 |
1.603 |
| 2028 |
119.5 |
1.604 |
| 2029 |
119.1 |
1.604 |
| 2030 |
118.6 |
1.604 |
| 2031 |
118.1 |
1.603 |
| 2032 |
117.7 |
1.603 |
| 2033 |
117.2 |
1.602 |
| 2034 |
116.8 |
1.600 |
| 2035 |
116.3 |
1.599 |
| 2036 |
115.8 |
1.597 |
| 2037 |
115.4 |
1.595 |
| 2038 |
114.9 |
1.592 |
| 2039 |
114.4 |
1.590 |
| 2040 |
114.0 |
1.587 |
| 2041 |
113.5 |
1.584 |
| 2042 |
113.0 |
1.580 |
| 2043 |
112.5 |
1.577 |
| 2044 |
112.1 |
1.573 |
| 2045 |
111.6 |
1.569 |
| 2046 |
111.1 |
1.564 |
| 2047 |
110.6 |
1.559 |
| 2048 |
110.1 |
1.554 |
| 2049 |
109.6 |
1.549 |
| 2050 |
109.1 |
1.544 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
