1) Add Equatorial Grid 2) Show All Sky 3) N 4) Cursor on Polaris 5) Right-click, then Zoom + Centre 6) Keep Zoom + Centre'ing in until you have the required scale
There are probably other ways, but the above works for me. Regards Pete -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] Behalf Of Sander Pool Sent: 10 April 2006 20:44 To: [email protected] Subject: [skychart-discussion] Using CdC to facilitate polar alignment All, I'd like to use CdC to determine where Polaris is with regards to the true celestial pole for a particular place/time. I was hoping to do this graphically but it's harder than I thought it would be, probably because I'm missing something. I have set my observatory to the correct location and the time for tonight 9PM. I search for 'umi' to get polaris in the fov. I add the eq grid. For some reason the grid is not 'straight'. The 20h line is slanted to the right through my screen. I would like the screen to mimic what I see when I look up so I click 'N' to look North. Bummer, now it's looking at the North horizon instead of rotating the fov. Does anyone use CdC for this purpose? If so, what is your procedure? Do you simply take the coordinates of Polaris from the detail view: Star BSC 1 Alp UMi Visual Magnitude: 2.02 Color Index: 0.60 Spectral Class: F7:Ib-II Proper Motion in Right ascension: 0.038 Proper Motion in Declination: -0.015 HR: 424 HD: 8890 Common Name: POLARIS Date RA: 02h39m05.29s DE:+89°17'28.9 J2000 RA: 02h31m48.70s DE:+89°15'51.0 Ecliptic L: +88°39'20 B:+66°06'08 Galactic L: +123°16'14 B:+26°25'37 Visibility for observatory: Genève 2006-04-10 19h31m39s ( UT + -7h00m ) Universal Time : 2006-04-11T02:31:39 Sideral Time : 7h42m Hour Angle : 5h03m Azimuth :+359°08' Altitude :+37°38' Circumpolar Culmination : 14h33m And use that? If so, which value do you take? :) Thanks, Sander PS I used CdC 3.0.1.1 SVN. I think there may be a more recent snapshot out there but I doubt it behaves differently for this purpose. Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/skychart-discussion/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
