plot_parallactic¶
- astroplan.plots.plot_parallactic(target, observer, time, ax=None, style_kwargs=None, style_sheet=None)[source]¶
Plots parallactic angle as a function of time for a given target.
If a
Axes
object already exists, an additional parallactic angle plot will be “stacked” on it. Otherwise, creates a newAxes
object and plots on top of that.When a scalar
Time
object is passed in (e.g.,Time('2000-1-1')
), the resulting plot will use a 24-hour window centered on the time indicated, with parallactic angle sampled at regular intervals throughout. However, the user can control the exact number and frequency of parallactic angle calculations used by passing in a non-scalarTime
object. For instance,Time(['2000-1-1 23:00:00', '2000-1-1 23:30:00'])
will result in a plot with only two parallactic angle measurements.For examples with plots, visit the documentation of Time Dependent Plots.
- Parameters
- target
FixedTarget
The celestial body of interest.
- observer
Observer
The person, telescope, observatory, etc. doing the observing.
- time
Time
If scalar (e.g.,
Time('2000-1-1')
), will result in plotting target parallactic angle once an hour over a 24-hour window. If non-scalar (e.g.,Time(['2000-1-1'])
,[Time('2000-1-1')]
,Time(['2000-1-1', '2000-1-2'])
), will result in plotting data at the exact times specified.- ax
Axes
or None, optional. The
Axes
object to be drawn on. If None, uses the currentAxes
.- style_kwargsdict or None, optional.
A dictionary of keywords passed into
plot_date
to set plotting styles.- style_sheetdict or
None
(optional) matplotlib style sheet to use. To see available style sheets in astroplan, print astroplan.plots.available_style_sheets. Defaults to the light theme.
- target
- Returns
- ax
Axes
An
Axes
object with added parallactic angle vs. time plot.
- ax