Bug in the calculation of earths longitude
lens17 opened this issue · 3 comments
Bug description
When calculating the position of the planets for the days 01. Feb. 1994 to 20. Feb. 1994 in the heliocentric model, the longitude values for all planets are increasing, except earths longitude, which is decreasing. I am pretty sure, that the earth orbits the sun in the same direction as the other planets but maybe I misunderstood some other part.
Steps to reproduce
- Initiate the heliocentric model for multiple successive days
- Check the longitude values of the planets
Expected behavior
The values should all increase from 0 to 360, before being reset to 0.
Actual behavior
The values are all increasing except for the planet earth, which produces decreasing values.
Example
| Mercury | Venus | Earth | ... | Uranus | Neptune | Pluto | |
|---|---|---|---|---|---|---|---|
| 1 Feb | 40.128605 | 321.130176 | 47.594349 | ... | 292.491378 | 290.984694 | 235.954543 |
| 2 Feb | 46.059545 | 322.712984 | 46.579564 | ... | 292.502617 | 290.990671 | 235.961465 |
| 3 Feb | 52.104250 | 324.296022 | 45.565080 | ... | 292.513856 | 290.996647 | 235.968387 |
| 4 Feb | 58.246625 | 325.879301 | 44.550905 | ... | 292.525095 | 291.002623 | 235.975309 |
| 5 Feb | 64.467773 | 327.462829 | 43.537049 | ... | 292.536333 | 291.008600 | 235.982230 |
| 6 Feb | 70.746318 | 329.046617 | 42.523519 | ... | 292.547572 | 291.014576 | 235.989152 |
| 7 Feb | 77.058894 | 330.630674 | 41.510326 | ... | 292.558810 | 291.020553 | 235.996073 |
| 8 Feb | 83.380793 | 332.215008 | 40.497476 | ... | 292.570048 | 291.026529 | 236.002995 |
| 9 Feb | 89.686727 | 333.799628 | 39.484978 | ... | 292.581286 | 291.032506 | 236.009916 |
| 10 Feb | 95.951654 | 335.384541 | 38.472841 | ... | 292.592524 | 291.038482 | 236.016837 |
| 11 Feb | 102.151601 | 336.969754 | 37.461072 | ... | 292.603762 | 291.044458 | 236.023758 |
| 12 Feb | 108.264414 | 338.555276 | 36.449680 | ... | 292.614999 | 291.050435 | 236.030678 |
| 13 Feb | 114.270379 | 340.141112 | 35.438671 | ... | 292.626236 | 291.056411 | 236.037599 |
| 14 Feb | 120.152674 | 341.727269 | 34.428053 | ... | 292.637474 | 291.062388 | 236.044520 |
| 15 Feb | 125.897627 | 343.313754 | 33.417835 | ... | 292.648711 | 291.068364 | 236.051440 |
| 16 Feb | 131.494795 | 344.900571 | 32.408023 | ... | 292.659947 | 291.074341 | 236.058360 |
| 17 Feb | 136.936874 | 346.487727 | 31.398624 | ... | 292.671184 | 291.080318 | 236.065280 |
| 18 Feb | 142.219483 | 348.075227 | 30.389646 | ... | 292.682421 | 291.086294 | 236.072200 |
| 19 Feb | 147.340858 | 349.663076 | 29.381096 | ... | 292.693657 | 291.092271 | 236.079120 |
| 20 Feb | 152.301490 | 351.251279 | 28.372979 | ... | 292.704893 | 291.098247 | 236.086040 |
@len17 thank you for your notice. You were right. There was a bug in Earth's position when view='horizontal'. True position should be 360 - position. Bug Fixed and new version released.
I somehow still have earth on a "wrong" position. I compare the position with the diagram on www.in-the-sky.org and www.theplanetstoday.com and Earth seems to be shifted roughly about 180°. See attached a plot for today (13.04.2020) from the package and from theplanetstoday.com.
Plot (neglecting the latitudes and distances):
Screenshot from theplanetstoday.com:
You are once more correct! It was 180 off not 360. Thank you once more. I think it should be ok now.