01262-6751 DON 17 (HD 8944)
01h 26m 09.45s -67° 50' 33.0" P.A. 291.00 sep 1.4 mag 8.81,9.81 Sp K0IV dist. 63.09 pc (205.8 l.y.)
Coord 2000 |
01262-6751 |
|
Discov num |
DON 17 |
|
Comp |
|
|
Coord arcsec 2000 |
01 26 09.45 -67 50 33.0 |
|
Date first |
1928 |
|
Date last |
2021 |
|
Obs |
46 |
|
Pa first |
357 |
|
Pa last |
291.4 |
|
P.A. Now (θ) |
291.4° |
|
Sep first |
0.7 |
|
Sep last |
1.431 |
|
Sep. Now (ρ) |
1.431" |
|
Mag pri |
8.81 |
|
Mag sec |
9.81 |
|
delta mag (ΔM) |
1 |
|
Spectral class |
K0IV (yellow-orange) |
|
Pri motion ra |
+117 |
|
Sec motion ra |
+117 |
|
Pri motion dec |
-062 |
|
Sec motion dec |
-062 |
|
Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 8944 |
|
Constellation |
Hydrus |
|
SAO |
248383 |
|
HIP |
6703 |
|
Tycho2 |
9136-00265-1 |
|
Gaia DR2 |
4692424016248469120 |
|
HD |
8944 |
|
CD |
CD-68 58 |
|
CP |
CP-68 57 |
|
Distance |
63.09 |
|
Distance ly |
205.8 |
|
ORBITAL ELEMENTS
Period (P) | 374.1934y | ± 133.5931 |
Periastron (T) | 1948.7445y | ± 1.8322 |
Semi-major axis (a) | 1.15202a | ± 0.14288 |
Eccentricity (e) | 0.8491 | ± 0.04483 |
Inclination (i) | 47.47° | ± 10.538 |
Longitude of periastron (ω) | 347.654° | ± 9.806 |
Node (Ω) | 134.941° | ± 6.087 |
Notes | | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
285.0 |
1.125 |
2001 |
285.3 |
1.140 |
2002 |
285.7 |
1.156 |
2003 |
286.0 |
1.171 |
2004 |
286.3 |
1.186 |
2005 |
286.7 |
1.201 |
2006 |
287.0 |
1.215 |
2007 |
287.3 |
1.230 |
2008 |
287.6 |
1.244 |
2009 |
287.9 |
1.258 |
2010 |
288.2 |
1.272 |
2011 |
288.4 |
1.286 |
2012 |
288.7 |
1.300 |
2013 |
289.0 |
1.313 |
2014 |
289.2 |
1.327 |
2015 |
289.5 |
1.340 |
2016 |
289.7 |
1.353 |
2017 |
290.0 |
1.366 |
2018 |
290.2 |
1.379 |
2019 |
290.5 |
1.392 |
2020 |
290.7 |
1.404 |
2021 |
290.9 |
1.416 |
2022 |
291.2 |
1.429 |
2023 |
291.4 |
1.441 |
2024 |
291.6 |
1.453 |
2025 |
291.8 |
1.464 |
2026 |
292.0 |
1.476 |
2027 |
292.2 |
1.488 |
2028 |
292.4 |
1.499 |
2029 |
292.6 |
1.510 |
2030 |
292.8 |
1.521 |
2031 |
293.0 |
1.532 |
2032 |
293.2 |
1.543 |
2033 |
293.4 |
1.554 |
2034 |
293.6 |
1.564 |
2035 |
293.8 |
1.575 |
2036 |
294.0 |
1.585 |
2037 |
294.2 |
1.596 |
2038 |
294.3 |
1.606 |
2039 |
294.5 |
1.616 |
2040 |
294.7 |
1.626 |
2041 |
294.9 |
1.635 |
2042 |
295.0 |
1.645 |
2043 |
295.2 |
1.654 |
2044 |
295.4 |
1.664 |
2045 |
295.5 |
1.673 |
2046 |
295.7 |
1.682 |
2047 |
295.8 |
1.691 |
2048 |
296.0 |
1.700 |
2049 |
296.2 |
1.709 |
2050 |
296.3 |
1.718 |
|
|

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|

Measures: green=micrometric, blue=interferometric, purple=photographic |
|