https://www.ipernity.com/group/astro/discuss https://cdn.ipernity.com/p/101/09/71/28937.buddy.jpg https://www.ipernity.com/group/astro/discuss This is an 0P3N sub-group. astrophotos and similar Sat, 11 Jul 2026 16:07:25 +0000 Sat, 11 Jul 2026 16:07:25 +0000 https://www.ipernity.com https://www.ipernity.com/group/astro/discuss/155621 tag:ipernity.com,2013-11-14,topic-155621 Thu, 14 Nov 2013 22:50:43 +0000 nobody@ipernity.com (Stargazer95050) <p class="who"><a href="https://www.ipernity.com/home/stargazer95050">Stargazer95050</a> has started a discussion:</p><div class="description">Recently I was trying to confirm if a certain time & date of a transit would occur.<br /> When I tried 4 different tools, they gave me 4 different results for the same observation location. 2 results were similar in time but still varied by a couple of degree in altitude. The other two had rise and set time 30....60 minutes earlier than the others. All tools are supposed to use the latest online data from NASA for their predictions<br /> <br /> Has anyone tried such a prediction and compared the ACTUAL result with different (online) tools ?</div> ISS transit in front of the Sun or Moon <p class="who"><a href="https://www.ipernity.com/home/stargazer95050">Stargazer95050</a> has started a discussion:</p><div class="description">Recently I was trying to confirm if a certain time & date of a transit would occur.<br /> When I tried 4 different tools, they gave me 4 different results for the same observation location. 2 results were similar in time but still varied by a couple of degree in altitude. The other two had rise and set time 30....60 minutes earlier than the others. All tools are supposed to use the latest online data from NASA for their predictions<br /> <br /> Has anyone tried such a prediction and compared the ACTUAL result with different (online) tools ?</div> Stargazer95050