by Henning Makholm » Mon Aug 02, 2010 10:49 am
nuclearcat wrote:These were taken in continuous mode so there is not more than 2 seconds between images.
Hm, so it has to be something that emits short bright flashes at intervals of between 30 and 60 seconds (short enough to show up in two consecutive exposures, long enough to be absent from the third). Comparison with the background stars should tell us the angular distance it moved between the two flashes and thus give a relationship between its height and speed.
I tried for about an hour to match the stars in the picture with an online star map, but utterly without success. Does that disqualify me from astronomy forums? It is most distracting that star maps all seem to come with lines that connect apparently arbitrarily chosen pairs of stars, when these lines are not actually present in the sky.
[quote="nuclearcat"]These were taken in continuous mode so there is not more than 2 seconds between images.[/quote]
Hm, so it has to be something that emits short bright flashes at intervals of between 30 and 60 seconds (short enough to show up in two consecutive exposures, long enough to be absent from the third). Comparison with the background stars should tell us the angular distance it moved between the two flashes and thus give a relationship between its height and speed.
I tried for about an hour to match the stars in the picture with an online star map, but utterly without success. Does that disqualify me from astronomy forums? It is most distracting that star maps all seem to come with lines that connect apparently arbitrarily chosen pairs of stars, when these lines are not actually present in the sky.