Precision - Revision history

Lee Carré: typography: replaced hyphen(/minus) with en-dash, when indicating a range

2011-05-25T23:26:24Z

typography: replaced hyphen(/minus) with en-dash, when indicating a range

Alexwolf at 18:40, 5 May 2011

2011-05-05T18:40:21Z

Alexwolf at 17:56, 19 February 2011

2011-02-19T17:56:01Z

Alexwolf at 16:14, 18 February 2011

2011-02-18T16:14:26Z

Alexwolf at 16:22, 13 February 2011

2011-02-13T16:22:22Z

Alexwolf: Created page with "Stellarium uses the [http://vizier.cfa.harvard.edu/viz-bin/ftp-index?/ftp/cats/VI/81 VSOP87] method to calculate the variation in position of the planets over time. As with oth..."

2011-02-13T16:21:35Z

Created page with "Stellarium uses the [http://vizier.cfa.harvard.edu/viz-bin/ftp-index?/ftp/cats/VI/81 VSOP87] method to calculate the variation in position of the planets over time. As with oth..."

New page

Stellarium uses the [http://vizier.cfa.harvard.edu/viz-bin/ftp-index?/ftp/cats/VI/81 VSOP87] method to calculate the variation in position of the planets over time.

As with other methods, the precision of the calculations vary according to the planet and the time for which one makes the calculation. Reasons for these inaccuracies include the fact that the motion of the planet isn't as predictable as Newtonian mechanics would have us believe.

As far as Stellarium is concerned, the user should bear in mind the following properties of the VSOP87 method. Precision values here are positional as observed from Earth.

{|
|Object(s)
|Method
|Notes
|-
Mercury, Venus, Earth-Moon barycenter, Mars
|VSOP87
|Precision is 1 arc-second from 2000 B.C. - 6000 A.D.
|-
|Jupiter, Saturn
|VSOP87
|Precision is 1 arc-second from 0 A.D. - 4000 A.D.
|-
|Uranus, Neptune
|VSOP87
|Precision is 1 arc-second from 4000 B.C - 8000 A.D.
|-
|Pluto
|?
|Pluto's position is valid from 1885 A.D. -2099 A.D.
|-
|Earth's Moon
|ELP2000-82B
|Unsure about interval of validity or precision at time of writing. Possibly valid from 1828 A.D. to 2047 A.D.
|-
|Galilean satellites
|L2
|Valid from 500 A.D - 3500 A.D.
|}

{{Template:UserManualNavigation|1=Configuration file|3=Stellarium User Guide|2=TUI Commands}}

[[Category:Stellarium User Guide]]

← Older revision		Revision as of 17:56, 19 February 2011
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	Stellarium uses the [http://vizier.cfa.harvard.edu/viz-bin/ftp-index?/ftp/cats/VI/81 VSOP87] method to calculate the variation in position of the planets over time.		Stellarium uses the [http://vizier.cfa.harvard.edu/viz-bin/ftp-index?/ftp/cats/VI/81 VSOP87] method to calculate the variation in position of the planets over time.

@@ Line 13: / Line 13: @@
   |Mercury, Venus, Earth-Moon barycenter, Mars
   |VSOP87
-  |Precision is 1 arc-second from 2000 B.C. - 6000 A.D.
+  |Precision is 1 arc-second from 2000 B.C. – 6000 A.D.
   |-
   |Jupiter, Saturn
   |VSOP87
-  |Precision is 1 arc-second from 0 A.D. - 4000 A.D.
+  |Precision is 1 arc-second from 0 A.D. – 4000 A.D.
   |-
   |Uranus, Neptune
   |VSOP87
-  |Precision is 1 arc-second from 4000 B.C - 8000 A.D.
+  |Precision is 1 arc-second from 4000 B.C – 8000 A.D.
   |-
   |Pluto
   |?
-  |Pluto's position is valid from 1885 A.D. -2099 A.D.
+  |Pluto's position is valid from 1885 A.D. – 2099 A.D.
   |-
   |Earth's Moon
@@ Line 33: / Line 33: @@
   |Galilean satellites
   |L2
-  |Valid from 500 A.D - 3500 A.D.
+  |Valid from 500 A.D – 3500 A.D.
   |}

@@ Line 6: / Line 6: @@
 As far as Stellarium is concerned, the user should bear in mind the following properties of the VSOP87 method. Precision values here are positional as observed from Earth.
-{|
+{| class="guidetable"
   |Object(s)
   |Method

@@ Line 35: / Line 35: @@
   |}
-{{Template:UserManualNavigation|1=Configuration file|3=Stellarium User Guide|2=TUI Commands}}
+{{Template:LRCNavigation|Configuration file|Stellarium User Guide|TUI Commands}}
 [[Category:Stellarium User Guide]]