{"id":1555,"date":"2019-08-26T09:02:04","date_gmt":"2019-08-26T14:02:04","guid":{"rendered":"http:\/\/jonvoisey.net\/blog\/?p=1555"},"modified":"2019-09-01T09:02:42","modified_gmt":"2019-09-01T14:02:42","slug":"data-stellar-quadrant-observations-8-24-19","status":"publish","type":"post","link":"https:\/\/jonvoisey.net\/blog\/2019\/08\/data-stellar-quadrant-observations-8-24-19\/","title":{"rendered":"Data: Stellar Quadrant Observations \u2013 8\/24\/19"},"content":{"rendered":"

Life has been eating me pretty heavily lately so I haven’t had any time to work on the Almagest, and barely any time to observe. But last weekend, I took the quadrant to Baroness Wars over in the Midrealm. The location wasn’t all that great. The dark sky map said it was like being in the suburbs of St Louis, and the fact that they left some lights on illuminating a racetrack or something next to the county fairgrounds we were in also sucked, but I was still able to get a few observations in over the two nights I was there.<\/p>\n

<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Object<\/strong><\/td>\nAlt<\/strong><\/td>\nAz<\/strong><\/td>\nST<\/strong><\/td>\nDec<\/strong><\/td>\nError<\/strong><\/span>1<\/sup><\/a><\/span><\/td>\n<\/tr>\n
Saturn<\/td>\n27.95<\/td>\n180<\/td>\n19:11<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
\u03b6 Sgr<\/td>\n20.4<\/td>\n180<\/td>\n19:15<\/td>\n-30.05<\/td>\n-0.17<\/td>\n<\/tr>\n
\u03b4 Aql<\/td>\n53.3<\/td>\n180<\/td>\n19:31<\/td>\n2.85<\/td>\n-0.27<\/td>\n<\/tr>\n
\u03b3\u00a0Aql<\/td>\n61.0<\/td>\n180<\/td>\n19:53<\/td>\n10.55<\/td>\n-0.06<\/td>\n<\/tr>\n
\u03b1 Aql<\/td>\n59.4<\/td>\n180<\/td>\n19:58<\/td>\n8.95<\/td>\n0.08<\/td>\n<\/tr>\n
\u03b7 Aql<\/td>\n50.9<\/td>\n180<\/td>\n20:02<\/td>\n0.45<\/td>\n-0.56<\/td>\n<\/tr>\n
\u03b3 Sge<\/td>\n69.8<\/td>\n180<\/td>\n20:08<\/td>\n19.35<\/td>\n-0.14<\/td>\n<\/tr>\n
\u03b8 Aql<\/td>\n49.6<\/td>\n180<\/td>\n20:19<\/td>\n-0.85<\/td>\n-0.03<\/td>\n<\/tr>\n
\u03b12 Cap<\/td>\n37.7<\/td>\n180<\/td>\n20:20<\/td>\n-12.75<\/td>\n-0.21<\/td>\n<\/tr>\n
\u03b2 Cap<\/td>\n35.05<\/td>\n180<\/td>\n20:28<\/td>\n-15.40<\/td>\n-0.62<\/td>\n<\/tr>\n
\u03b5 Del<\/td>\n61.7<\/td>\n180<\/td>\n20:40<\/td>\n11.25<\/td>\n-0.05<\/td>\n<\/tr>\n
\u03b2 Del<\/td>\n65.1<\/td>\n180<\/td>\n20.44<\/td>\n14.64<\/td>\n0.05<\/td>\n<\/tr>\n
\u03b1 Del<\/td>\n66.55<\/td>\n180<\/td>\n20:49<\/td>\n16.10<\/td>\n0.19<\/td>\n<\/tr>\n
\u03b5 Aqr<\/td>\n41.1<\/td>\n180<\/td>\n20:55<\/td>\n-9.35<\/td>\n0.15<\/td>\n<\/tr>\n
\u03bd Oph<\/td>\n40.4<\/td>\n180<\/td>\n18:04<\/td>\n-10.05<\/td>\n-0.28<\/td>\n<\/tr>\n
\u03b3 Sgr<\/td>\n19.95<\/td>\n180<\/td>\n18:08<\/td>\n-30.50<\/td>\n-0.07<\/td>\n<\/tr>\n
72 Oph<\/td>\n59.8<\/td>\n180<\/td>\n18:14<\/td>\n9.34<\/td>\n-0.22<\/td>\n<\/tr>\n
\u03bc Sgr<\/td>\n29.5<\/td>\n180<\/td>\n18:22<\/td>\n-20.95<\/td>\n0.11<\/td>\n<\/tr>\n
\u03b7 Ser<\/td>\n47.3<\/td>\n180<\/td>\n18:30<\/td>\n-3.15<\/td>\n-0.25<\/td>\n<\/tr>\n
\u03bb Sgr<\/td>\n25.4<\/td>\n180<\/td>\n18:32<\/td>\n-25.05<\/td>\n0.37<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nAverage<\/strong><\/td>\n-0.10<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nStDev<\/strong><\/td>\n0.24<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

One of the things I noticed when putting the data in is that I was consistently several minutes late (as in 5-8 minutes) in judging when objects were on the meridian. Some of this can be explained by aligning on the north star as it was almost at its full distance east of the meridian, meaning that I would be judging objects in the south when they were past the meridian.\u00a0But assuming I was perfectly aligned on the north star, that can only account for about 2m40s of that difference.<\/p>\n

If you’ve followed the observational posts, you’ll see that judging when an object is right on the meridian has long been a problem. Formerly, we were consistently too early. To try to solve this, I’ve been using the sights on the instrument which we formerly abandoned. While they’re still certainly no good for judging altitude, seeing if the star is lined up left to right is much easier.<\/p>\n

But given the consistent late measurements I’ve had the past few times using this quadrant, my suspicion is that they’re slightly misaligned. Thus, I think I’ll go back to the previous method of just trying to determine it by looking down the edge of the quadrant arm.<\/p>\n

In addition, the error in the declination creeped up a bit this time. It’s still in line with long term averages.<\/p>\n","protected":false},"excerpt":{"rendered":"

Life has been eating me pretty heavily lately so I haven’t had any time to work on the Almagest, and barely any time to observe. But last weekend, I took the quadrant to Baroness Wars over in the Midrealm. The location wasn’t all that great. The dark sky map said it was like being in … <\/p>\n

Continue reading “Data: Stellar Quadrant Observations \u2013 8\/24\/19”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[33],"tags":[22],"class_list":["post-1555","post","type-post","status-publish","format-standard","hentry","category-data","tag-quadrant"],"acf":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p9ZpvC-p5","_links":{"self":[{"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/posts\/1555","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/comments?post=1555"}],"version-history":[{"count":2,"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/posts\/1555\/revisions"}],"predecessor-version":[{"id":1557,"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/posts\/1555\/revisions\/1557"}],"wp:attachment":[{"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/media?parent=1555"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/categories?post=1555"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jonvoisey.net\/blog\/wp-json\/wp\/v2\/tags?post=1555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}