00121-5832 RST 4739 (HD 791)
00h 12m 05.19s -58° 31' 29.3" P.A. 262.00 sep 0.2 mag 8.44,8.61 Sp G5IV/V dist. 59.38 pc (193.7 l.y.)
| Coord 2000 |
00121-5832 |
|
Discov num |
RST4739 |
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Comp |
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Coord arcsec 2000 |
00 12 05.19 -58 31 29.3 |
|
| Date first |
1942 |
|
Date last |
2020 |
|
Obs |
13 |
|
| Pa first |
283 |
|
Pa last |
261.5 |
|
P.A. Now (θ) |
245.3° |
|
| Sep first |
0.3 |
|
Sep last |
0.236 |
|
Sep. Now (ρ) |
0.198" |
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| Mag pri |
8.44 |
|
Mag sec |
8.61 |
|
delta mag (ΔM) |
0.17 |
|
Spectral class |
G5IV/V (yellow) |
|
| Pri motion ra |
+066 |
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Sec motion ra |
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| Pri motion dec |
-156 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 791 |
|
Constellation |
Tucana |
|
SAO |
231967 |
|
HIP |
975 |
|
| Tycho2 |
8470-00653-1 |
|
HD |
791 |
|
GC |
213 |
|
CP |
CP-59 10 |
|
| Distance |
59.38 |
|
Distance ly |
193.7 |
|
ORBITAL ELEMENTS
| Period (P) | 38.23y | |
Periastron (T) | 2027.97y | |
Semi-major axis (a) | 0.226a | |
| Eccentricity (e) | 0.551 | |
Inclination (i) | 155.6° | |
Longitude of periastron (ω) | 275.8° | |
| Node (Ω) | 50.1° | |
Notes | | |
Reference | Cve2020 | |
| Equinox | 2000 | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
349.0 |
0.273 |
| 2001 |
344.3 |
0.283 |
| 2002 |
339.9 |
0.292 |
| 2003 |
335.7 |
0.299 |
| 2004 |
331.7 |
0.305 |
| 2005 |
327.8 |
0.310 |
| 2006 |
324.1 |
0.314 |
| 2007 |
320.4 |
0.317 |
| 2008 |
316.8 |
0.319 |
| 2009 |
313.2 |
0.320 |
| 2010 |
309.6 |
0.319 |
| 2011 |
306.0 |
0.318 |
| 2012 |
302.4 |
0.315 |
| 2013 |
298.7 |
0.312 |
| 2014 |
294.9 |
0.307 |
| 2015 |
290.9 |
0.301 |
| 2016 |
286.8 |
0.294 |
| 2017 |
282.4 |
0.285 |
| 2018 |
277.8 |
0.275 |
| 2019 |
272.7 |
0.263 |
| 2020 |
267.2 |
0.250 |
| 2021 |
261.0 |
0.235 |
| 2022 |
253.8 |
0.218 |
| 2023 |
245.3 |
0.198 |
| 2024 |
234.9 |
0.176 |
| 2025 |
221.1 |
0.151 |
| 2026 |
201.8 |
0.125 |
| 2027 |
172.7 |
0.102 |
| 2028 |
132.5 |
0.093 |
| 2029 |
93.6 |
0.105 |
| 2030 |
66.2 |
0.128 |
| 2031 |
47.5 |
0.153 |
| 2032 |
34.0 |
0.176 |
| 2033 |
23.4 |
0.197 |
| 2034 |
14.8 |
0.215 |
| 2035 |
7.5 |
0.232 |
| 2036 |
1.1 |
0.246 |
| 2037 |
355.4 |
0.259 |
| 2038 |
350.2 |
0.271 |
| 2039 |
345.4 |
0.281 |
| 2040 |
340.9 |
0.290 |
| 2041 |
336.6 |
0.297 |
| 2042 |
332.6 |
0.304 |
| 2043 |
328.7 |
0.309 |
| 2044 |
324.9 |
0.313 |
| 2045 |
321.3 |
0.316 |
| 2046 |
317.6 |
0.319 |
| 2047 |
314.0 |
0.320 |
| 2048 |
310.5 |
0.319 |
| 2049 |
306.9 |
0.318 |
| 2050 |
303.2 |
0.316 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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