08289-1552 RST 4403 (HD 71811)
08h 28m 56.65s -15° 52' 13.8" P.A. 256.00 sep 1.4 mag 8.64,11.96 Sp K1V dist. 35.3 pc (115.15 l.y.)
| Coord 2000 |
08289-1552 |
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Discov num |
RST4403 |
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Comp |
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Coord arcsec 2000 |
08 28 56.65 -15 52 13.8 |
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| Date first |
1940 |
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Date last |
2019 |
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Obs |
12 |
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| Pa first |
13 |
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Pa last |
256 |
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P.A. Now (θ) |
256° |
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| Sep first |
1.6 |
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Sep last |
1.354 |
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Sep. Now (ρ) |
1.354" |
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| Mag pri |
8.64 |
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Mag sec |
11.96 |
|
delta mag (ΔM) |
3.32 |
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Spectral class |
K1V (yellow-orange) |
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| Pri motion ra |
+154 |
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Sec motion ra |
+153 |
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| Pri motion dec |
-147 |
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Sec motion dec |
-142 |
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| Notes |
O
(Orbital solution) |
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rPM=0.024 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 71811 |
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Constellation |
Hydra |
|
SAO |
154301 |
|
HIP |
41609 |
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| Tycho2 |
5998-01012-1 |
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Gaia DR2 |
5721995606302873472 |
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HD |
71811 |
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BD |
BD-15 2454 |
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| Distance |
35.3 |
|
Distance ly |
115.15 |
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ORBITAL ELEMENTS
| Period (P) | 205.6y | ± 2.4 |
Periastron (T) | 2149.6y | ± 3.8 |
Semi-major axis (a) | 1.191a | ± 0.21 |
| Eccentricity (e) | 0.183 | ± 0.034 |
Inclination (i) | 160° | ± 5.9 |
Longitude of periastron (ω) | 25.8° | ± 2.8 |
| Node (Ω) | 67.5° | ± 2.2 |
Notes | | |
Reference | Hor2021b | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
282.2 |
1.232 |
| 2001 |
280.7 |
1.240 |
| 2002 |
279.3 |
1.248 |
| 2003 |
277.8 |
1.255 |
| 2004 |
276.3 |
1.262 |
| 2005 |
274.9 |
1.270 |
| 2006 |
273.5 |
1.277 |
| 2007 |
272.1 |
1.283 |
| 2008 |
270.7 |
1.290 |
| 2009 |
269.3 |
1.297 |
| 2010 |
268.0 |
1.303 |
| 2011 |
266.6 |
1.309 |
| 2012 |
265.3 |
1.315 |
| 2013 |
264.0 |
1.321 |
| 2014 |
262.7 |
1.327 |
| 2015 |
261.4 |
1.332 |
| 2016 |
260.1 |
1.337 |
| 2017 |
258.8 |
1.342 |
| 2018 |
257.5 |
1.347 |
| 2019 |
256.3 |
1.352 |
| 2020 |
255.0 |
1.356 |
| 2021 |
253.8 |
1.360 |
| 2022 |
252.5 |
1.364 |
| 2023 |
251.3 |
1.368 |
| 2024 |
250.1 |
1.371 |
| 2025 |
248.9 |
1.375 |
| 2026 |
247.7 |
1.378 |
| 2027 |
246.5 |
1.381 |
| 2028 |
245.3 |
1.383 |
| 2029 |
244.1 |
1.386 |
| 2030 |
242.9 |
1.388 |
|
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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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