TimeSeries of position (Asteroid)
francois.bonnarel at astro.unistra.fr
Wed Nov 21 19:15:19 CET 2018
Der Dave, all,*
Before interop Dave asked me to provide how a TimeSeries of Asteroid
could look like with the current ts model proposal and Utypes serialisation.
> Someone recently described to me a use case that I haven't seen in our
> To help me understand how to use the new model, could you send me a
> simple example of how a time series of position over time would look ?
> For a single moving object we would get multiple ra/dec or Point
> values plotted against time.
> For a mode complex example, multiple position and magnitude values
> plotted against time.
You can find a "dummy example" of this at this URL :
Could be from gaia for an Asteroid.
Then Dave gave more details for the second more complex example
> Two use cases from the Gaia meeting.
> Exoplanets, the star will change both brightness and position by tiny
> amounts linked to the planet's orbit. Very small and slow changes in
> both position and brightness, hard to detect above the noise.
> Near earth asteroid will be travelling very fast, and change
> brightness in response to distance from the sun, position relative to
> the sun, and rotation and shape of the asteroid itself. Very large and
> rapid changes in both position and brightness.
> Both are valid cases for time series of positions and magnitudes.
I will buld them for tommorrow.
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