Make plots to display Hipparcos/Gaia fit results

[sblunt]

Two that I'd like to see:

(1) orbit tracks of absolute ra, dec position of star minus hip0 position (keyword to incl plx or not)
(2) orbit tracks of pmra, pmdec of star

[semaphoreP]

Could be 1D histograms showing predicted and measured values? Maybe better to show PMa, rather than absolute astrometry.

[sblunt]

Lea has some code, check with her when I get to this. Plot ideas: Fig 1 of https://arxiv.org/pdf/1808.06257.pdf

[wbalmer]

I'd love to be able to replicate the third panel of figure 2 here (https://arxiv.org/pdf/1912.02565.pdf) i.e. delta mu_RA and Dec over time, plotting the hip and gaia measurements (almost like the RV plot?)

[wbalmer]

I have a start on this (finally). I'll try to fold it into a nice function. Should it be separate from the plot_orbits function, or a yes/no option within it?

[sblunt]

Awesome! This looks great. Thanks William! I personally feel like our orbit plots are getting a little bloated, so we should keep this separate.