ecliptic line is for J2000.0, not for current date
Bug #512086 reported by
gzotti
This bug affects 4 people
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Stellarium |
Fix Released
|
High
|
gzotti |
Bug Description
Someone mentioned this in the forum, I only confirm it and express a wish.
The currently shown ecliptic appears to be the VSOP87 or J2000.0 ecliptic only, not the eclipticof current date.
For ancient dates, the sun thus is off the ecliptic!
It would be desirable to have not only equatorial grids "current" and "J2000.0", but the same for the ecliptic.
Related branches
lp:~georg-zotti/stellarium/gz_fix-ecliptic-obliquity
- Alexander Wolf: Approve
- gzotti: Needs Resubmitting
-
Diff: 2869 lines (+1419/-206)28 files modifiedREADME (+5/-1)
data/default_config.ini.cmake (+22/-6)
src/CMakeLists.txt (+19/-0)
src/core/StelCore.cpp (+82/-15)
src/core/StelCore.hpp (+61/-36)
src/core/StelObject.cpp (+39/-19)
src/core/StelObject.hpp (+12/-2)
src/core/StelObserver.cpp (+28/-2)
src/core/VecMath.hpp (+42/-2)
src/core/modules/GridLinesMgr.cpp (+273/-24)
src/core/modules/GridLinesMgr.hpp (+140/-17)
src/core/modules/Landscape.cpp (+6/-0)
src/core/modules/Planet.cpp (+62/-18)
src/core/modules/Planet.hpp (+9/-3)
src/core/modules/SolarSystem.cpp (+4/-0)
src/core/planetsephems/elp82b.h (+1/-1)
src/core/planetsephems/gust86.c (+1/-1)
src/core/planetsephems/gust86.h (+3/-3)
src/core/planetsephems/precession.c (+260/-0)
src/core/planetsephems/precession.h (+59/-0)
src/core/planetsephems/sidereal_time.c (+35/-20)
src/core/planetsephems/vsop87.h (+1/-1)
src/gui/ConfigurationDialog.cpp (+4/-1)
src/gui/LocationDialog.cpp (+1/-1)
src/gui/ViewDialog.cpp (+5/-1)
src/gui/viewDialog.ui (+89/-32)
src/tests/testPrecession.cpp (+121/-0)
src/tests/testPrecession.hpp (+35/-0)
Changed in stellarium: | |
status: | New → Confirmed |
importance: | Undecided → Medium |
Changed in stellarium: | |
milestone: | none → 1.0.0 |
Changed in stellarium: | |
status: | Incomplete → Confirmed |
Changed in stellarium: | |
importance: | Medium → High |
Changed in stellarium: | |
status: | Confirmed → Incomplete |
Changed in stellarium: | |
status: | Incomplete → Confirmed |
Changed in stellarium: | |
assignee: | nobody → Weisson Ang (avgserviceprovider) |
Changed in stellarium: | |
assignee: | Weisson Ang (avgserviceprovider) → nobody |
Changed in stellarium: | |
milestone: | 1.0.0 → none |
tags: | added: ecliptic |
Changed in stellarium: | |
status: | Confirmed → In Progress |
assignee: | nobody → gzotti (georg-zotti) |
Changed in stellarium: | |
milestone: | none → 0.14.0 |
Changed in stellarium: | |
status: | In Progress → Fix Committed |
Changed in stellarium: | |
status: | Fix Committed → Fix Released |
Changed in stellarium: | |
milestone: | 0.14.0 → none |
affects: | stellarium → stellarium-website |
affects: | stellarium-website → stellarium |
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(After discussion)
"Ecliptic plane" is always only Earth's orbital plane. Currently, Stellarium shows the projection of the VSOP xy plane, which is more or less the same as the ecliptic line for the present time. For times far from now, however, there is a slow shift, which causes most visibly the sun to stand besides the displayed ecliptic line. Therefore it would be desirable to call the currently visible line "Ecliptic 2000.0", and add another line to show the ecliptic "of current date".
Maybe whole ecliptic coordinate grids can be added, not just the ecliptic line?
For observer locations on other planets, an optional feature might also show the orbital plane of the planet where you are located, in addition to the ecliptic lines. However, extraterrestrial astronomy is few observers' concern.