New answers tagged time
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Convert GPS Week and GPS Time of Week to J2000?
Astropy actually has a GPS format that takes the time since the GPS epoch as an argument.
Also, I would recommend using astropy.units to simplify the conversions.
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What are the twinkling stars in the New Horizons Arrokoth approach?
I got a still from the video and uploaded it to nova.astrometry.net. This successfully identified the field and provided an astrometrically calibrated image.
The two stars are:
The fainter, large ...
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Determing timestamp of a photo of the stars using a plate solver
Based on all the discussion under my first answer based on things other than stars that move rapidly, I see that a star-based answer is still desired.
By only observing the proper motion of stars ...
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How can I plot a rotary cam for the equation of time?
Following the video, the shape of the cam is a polar plot of the equation of time, with an offset to keep the values positive. You can use any of the trigonometric approximations to the equation of ...
- 122k
4
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Delta T used by US Naval Observatory
As I pointed out in the comments, the difference appears to be due to the use of predicted values of $ \Delta T $ rather than a value updated with the most recent data from the International Earth ...
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Determining Vernal Equinox by observation
As noted in comments, Easter has been calculated, not measured since the third century. However measuring the date of the equinox is something that is well within the abilities of any ancient ...
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Determining Vernal Equinox by observation
People have been able to determine the approximate date of the equinox since ancient times. The Babylonians even knew (to fairly good precision) the location of the First Point of Aries (the March ...
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