02290-1959 RST 2280 Aa,Ab
02h 29m 01.67s -19° 58' 45.0" P.A. 40.00 sep 0.4 mag 8.95,12.24 Sp K4V dist. 19.55 pc (63.77 l.y.)
| Coord 2000 |
02290-1959 |
|
Discov num |
RST2280 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
02 29 01.67 -19 58 45.0 |
|
| Date first |
1934 |
|
Date last |
2023 |
|
Obs |
20 |
|
| Pa first |
346 |
|
Pa last |
39.9 |
|
P.A. Now (θ) |
13.6° (calc) |
|
| Sep first |
0.5 |
|
Sep last |
0.38 |
|
Sep. Now (ρ) |
0.565" (calc) |
|
| Mag pri |
8.95 |
|
Mag sec |
12.24 |
|
delta mag (ΔM) |
3.29 |
|
Spectral class |
K4V (yellow-orange) |
|
| Pri motion ra |
+613 |
|
Sec motion ra |
|
|
| Pri motion dec |
+187 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
02290-1959 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
167819 |
02 29 02 -19 58 45 |
RST 2280 Aa,Ab |
2023 |
20 |
40 |
0.4 |
8.95 |
12.24 |
3.29 |
Y |
<=== |
| Show |
|
167819 |
02 29 02 -19 58 45 |
UC 744 AB |
2016 |
7 |
242 |
474.6 |
8.40 |
11.80 |
3.40 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cetus |
|
SAO |
167819 |
|
HIP |
11565 |
|
Tycho2 |
5862-01720-1 |
|
| HD |
15468 |
|
BD |
BD-20 465 |
|
Distance |
19.55 |
|
Distance ly |
63.77 |
|
ORBITAL ELEMENTS
| Period (P) | 31.5y | ± 0.49 |
Periastron (T) | 2020.764y | ± 0.012 |
Semi-major axis (a) | 0.529a | ± 0.007 |
| Eccentricity (e) | 0.6497 | ± 0.0039 |
Inclination (i) | 163.5° | ± 1.7 |
Longitude of periastron (ω) | 18.3° | ± 5.2 |
| Node (Ω) | 168.3° | ± 5.2 |
Notes | | |
Reference | Msn2023 | |
| Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
346.9 |
0.808 |
| 2001 |
343.4 |
0.831 |
| 2002 |
340.1 |
0.849 |
| 2003 |
337.0 |
0.861 |
| 2004 |
333.8 |
0.868 |
| 2005 |
330.7 |
0.869 |
| 2006 |
327.7 |
0.866 |
| 2007 |
324.5 |
0.857 |
| 2008 |
321.3 |
0.843 |
| 2009 |
317.9 |
0.823 |
| 2010 |
314.4 |
0.798 |
| 2011 |
310.6 |
0.768 |
| 2012 |
306.4 |
0.731 |
| 2013 |
301.8 |
0.689 |
| 2014 |
296.5 |
0.640 |
| 2015 |
290.3 |
0.584 |
| 2016 |
282.7 |
0.520 |
| 2017 |
272.7 |
0.449 |
| 2018 |
258.7 |
0.370 |
| 2019 |
236.8 |
0.287 |
| 2020 |
197.9 |
0.212 |
| 2021 |
134.6 |
0.186 |
| 2022 |
79.7 |
0.241 |
| 2023 |
50.1 |
0.329 |
| 2024 |
33.1 |
0.417 |
| 2025 |
21.9 |
0.496 |
| 2026 |
13.6 |
0.565 |
| 2027 |
7.0 |
0.626 |
| 2028 |
1.5 |
0.679 |
| 2029 |
356.8 |
0.724 |
| 2030 |
352.6 |
0.763 |
| 2031 |
348.7 |
0.795 |
| 2032 |
345.1 |
0.821 |
| 2033 |
341.8 |
0.841 |
| 2034 |
338.5 |
0.856 |
| 2035 |
335.4 |
0.865 |
| 2036 |
332.3 |
0.869 |
| 2037 |
329.2 |
0.868 |
| 2038 |
326.1 |
0.862 |
| 2039 |
322.9 |
0.850 |
| 2040 |
319.6 |
0.834 |
| 2041 |
316.2 |
0.811 |
| 2042 |
312.5 |
0.784 |
| 2043 |
308.6 |
0.750 |
| 2044 |
304.2 |
0.711 |
| 2045 |
299.3 |
0.665 |
| 2046 |
293.6 |
0.613 |
| 2047 |
286.7 |
0.553 |
| 2048 |
278.0 |
0.486 |
| 2049 |
266.4 |
0.411 |
| 2050 |
249.2 |
0.329 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
