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 |
|
Discov num |
STF1216 |
|
Comp |
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Coord arcsec 2000 |
08 21 20.28 -01 36 07.3 |
|
| Date first |
1825 |
|
Date last |
2020 |
|
Obs |
188 |
|
| Pa first |
110 |
|
Pa last |
310.6 |
|
P.A. Now (θ) |
315° |
|
| Sep first |
0.5 |
|
Sep last |
0.538 |
|
Sep. Now (ρ) |
0.518" |
|
| Mag pri |
6.85 |
|
Mag sec |
7.88 |
|
delta mag (ΔM) |
1.03 |
|
Spectral class |
A2Vpn: (white) |
|
| Pri motion ra |
-009 |
|
Sec motion ra |
-009 |
|
| Pri motion dec |
-028 |
|
Sec motion dec |
-028 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 70340 |
|
Constellation |
Hydra |
|
SAO |
135804 |
|
HIP |
40941 |
|
| Tycho2 |
4848-00292-1 |
|
HD |
70340 |
|
HR |
3278 |
|
GC |
11387 |
|
| ADS |
6762 |
|
BD |
BD-01 2017 |
|
Distance |
156.49 |
|
Distance ly |
510.47 |
|
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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