{"action":"created","issue":{"url":"https://api.github.com/repos/astropy/astropy/issues/4963","repository_url":"https://api.github.com/repos/astropy/astropy","labels_url":"https://api.github.com/repos/astropy/astropy/issues/4963/labels{/name}","comments_url":"https://api.github.com/repos/astropy/astropy/issues/4963/comments","events_url":"https://api.github.com/repos/astropy/astropy/issues/4963/events","html_url":"https://github.com/astropy/astropy/pull/4963","id":155986172,"number":4963,"title":"added approximate routine for calculating position of the moon","user":{"login":"StuartLittlefair","id":4570807,"avatar_url":"https://avatars.githubusercontent.com/u/4570807?v=3","gravatar_id":"","url":"https://api.github.com/users/StuartLittlefair","html_url":"https://github.com/StuartLittlefair","followers_url":"https://api.github.com/users/StuartLittlefair/followers","following_url":"https://api.github.com/users/StuartLittlefair/following{/other_user}","gists_url":"https://api.github.com/users/StuartLittlefair/gists{/gist_id}","starred_url":"https://api.github.com/users/StuartLittlefair/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/StuartLittlefair/subscriptions","organizations_url":"https://api.github.com/users/StuartLittlefair/orgs","repos_url":"https://api.github.com/users/StuartLittlefair/repos","events_url":"https://api.github.com/users/StuartLittlefair/events{/privacy}","received_events_url":"https://api.github.com/users/StuartLittlefair/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/astropy/astropy/labels/coordinates","name":"coordinates","color":"c7def8"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2016-05-20T15:14:32Z","updated_at":"2016-05-27T14:40:46Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/astropy/astropy/pulls/4963","html_url":"https://github.com/astropy/astropy/pull/4963","diff_url":"https://github.com/astropy/astropy/pull/4963.diff","patch_url":"https://github.com/astropy/astropy/pull/4963.patch"},"body":"This PR fixes #4943.\r\n\r\nI have coded up the algorithm in Jean Meeus', 'Astronomical Algorithms', second edition, 1998, Willmann-Bell for the approximate position of the Moon. Compared with JPL ephemerides this is only accurate to 15 arcsecs and 60 km over the range 1950-2050 (see below). However, it does not require any public downloads. \r\n\r\n![meeus](https://cloud.githubusercontent.com/assets/4570807/15432385/e0970cfc-1ea5-11e6-9ee0-9c9b25a45513.png)\r\n\r\n\r\nThe function defined here has not been made part of the public API. I am thinking that the function can be used to add the moon to the ```approximate``` ephemeris added in #4920 once that PR is merged."},"comment":{"url":"https://api.github.com/repos/astropy/astropy/issues/comments/222164144","html_url":"https://github.com/astropy/astropy/pull/4963#issuecomment-222164144","issue_url":"https://api.github.com/repos/astropy/astropy/issues/4963","id":222164144,"user":{"login":"StuartLittlefair","id":4570807,"avatar_url":"https://avatars.githubusercontent.com/u/4570807?v=3","gravatar_id":"","url":"https://api.github.com/users/StuartLittlefair","html_url":"https://github.com/StuartLittlefair","followers_url":"https://api.github.com/users/StuartLittlefair/followers","following_url":"https://api.github.com/users/StuartLittlefair/following{/other_user}","gists_url":"https://api.github.com/users/StuartLittlefair/gists{/gist_id}","starred_url":"https://api.github.com/users/StuartLittlefair/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/StuartLittlefair/subscriptions","organizations_url":"https://api.github.com/users/StuartLittlefair/orgs","repos_url":"https://api.github.com/users/StuartLittlefair/repos","events_url":"https://api.github.com/users/StuartLittlefair/events{/privacy}","received_events_url":"https://api.github.com/users/StuartLittlefair/received_events","type":"User","site_admin":false},"created_at":"2016-05-27T14:40:46Z","updated_at":"2016-05-27T14:40:46Z","body":"@mhvk I guess now #4920 is in I should rebase this on astropy/master and make changes so the moon is available as part of the ```builtin``` ephemeris?"}}
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