08213-0136 STF 1216 (HD 70340)
08h 21m 20.28s -01° 36' 07.3" P.A. 311.00 sep 0.5 mag 6.85,7.88 Sp A2Vpn: dist. 156.49 pc (510.47 l.y.)
Coord 2000 |
08213-0136 |
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Discov num |
STF1216 |
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Comp |
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Coord arcsec 2000 |
08 21 20.28 -01 36 07.3 |
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Date first |
1825 |
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Date last |
2020 |
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Obs |
188 |
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Pa first |
110 |
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Pa last |
310.6 |
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P.A. Now (θ) |
315° |
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Sep first |
0.5 |
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Sep last |
0.538 |
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Sep. Now (ρ) |
0.518" |
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Mag pri |
6.85 |
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Mag sec |
7.88 |
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delta mag (ΔM) |
1.03 |
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Spectral class |
A2Vpn: (white) |
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Pri motion ra |
-009 |
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Sec motion ra |
-009 |
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Pri motion dec |
-028 |
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Sec motion dec |
-028 |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 70340 |
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Constellation |
Hydra |
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SAO |
135804 |
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HIP |
40941 |
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Tycho2 |
4848-00292-1 |
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HD |
70340 |
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HR |
3278 |
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GC |
11387 |
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ADS |
6762 |
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BD |
BD-01 2017 |
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Distance |
156.49 |
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Distance ly |
510.47 |
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ORBITAL ELEMENTS
Period (P) | 402y | ± 15 |
Periastron (T) | 2322y | ± 26 |
Semi-major axis (a) | 0.565a | ± 0.016 |
Eccentricity (e) | 0.109 | ± 0.018 |
Inclination (i) | 31.7° | ± 1.6 |
Longitude of periastron (ω) | 310.8° | ± 9.5 |
Node (Ω) | 264.1° | ± 4.8 |
Notes | n | |
Reference | Tok2014a | |
Equinox | 2000 | |
Last observation | 2013 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
294.6 |
0.527 |
2001 |
295.5 |
0.526 |
2002 |
296.4 |
0.526 |
2003 |
297.3 |
0.526 |
2004 |
298.1 |
0.525 |
2005 |
299.0 |
0.525 |
2006 |
299.9 |
0.525 |
2007 |
300.8 |
0.524 |
2008 |
301.6 |
0.524 |
2009 |
302.5 |
0.523 |
2010 |
303.4 |
0.523 |
2011 |
304.3 |
0.523 |
2012 |
305.2 |
0.522 |
2013 |
306.1 |
0.522 |
2014 |
307.0 |
0.521 |
2015 |
307.8 |
0.521 |
2016 |
308.7 |
0.520 |
2017 |
309.6 |
0.520 |
2018 |
310.5 |
0.520 |
2019 |
311.4 |
0.519 |
2020 |
312.3 |
0.519 |
2021 |
313.2 |
0.518 |
2022 |
314.1 |
0.518 |
2023 |
315.0 |
0.518 |
2024 |
315.9 |
0.517 |
2025 |
316.8 |
0.517 |
2026 |
317.7 |
0.516 |
2027 |
318.6 |
0.516 |
2028 |
319.5 |
0.516 |
2029 |
320.5 |
0.515 |
2030 |
321.4 |
0.515 |
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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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