write me a method to plot the distance from the earth to enceladus over a year in matlab

One possible method to plot the distance from the Earth to Enceladus over a year in MATLAB is to use the JPL HORIZONS system to obtain the distance data, and then plot the results using MATLAB's built-in plotting functions.

Here is an example MATLAB function that obtains the distance data from the JPL HORIZONS system and plots the results:

main.m
function plot_enceladus_distance()
% Plot the distance from the Earth to Enceladus over a year

% Set the JPL HORIZONS query parameters
target = 'Enceladus';
observer = 'Earth';
time_span = '1y'; % time span is 1 year
time_step = '1d'; % time step is 1 day
quantity = '3'; % quantity is distance

% Construct the JPL HORIZONS query URL
url = sprintf('https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND="%s;%s"&MAKE_EPHEM=YES&TABLE_TYPE=OBSERVER&START_TIME=2022-01-01&STOP_TIME=2023-01-01&STEP_SIZE=%s&QUANTITIES=%s&CENTER=%s', target, observer, time_step, quantity, observer);

% Send the JPL HORIZONS query and parse the results
options = weboptions('ContentType', 'text');
data = webread(url, options);
lines = splitlines(data);
data_start = find(contains(lines, 'Date__(UT)__HR:MN:SC.fff'));
data_end = find(contains(lines, '$$EOE'));
data_lines = lines(data_start+2:data_end-1);
data_cells = cellfun(@(x) strsplit(x, ','), data_lines, 'UniformOutput', false); % parse the CSV data
data_matrix = [data_cells{:}];
time_strings = data_matrix(:,1);
distances = str2double(data_matrix(:,2));
times = datetime(time_strings, 'InputFormat', 'yyyy-MM-dd HH:mm:ss.SSS', 'TimeZone', 'UTC');

% Plot the distance data
plot(times, distances)
title('Distance from Earth to Enceladus over a year')
xlabel('Time (UTC)')
ylabel('Distance (km)')
end
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The plot_enceladus_distance function sends a JPL HORIZONS query to obtain the distance from the Earth to Enceladus over a 1-year time span with a 1-day time step. It then parses the resulting CSV data and plots the distance data using MATLAB's plot function.

Note that this function depends on MATLAB's built-in web functions (webread and weboptions) to send the JPL HORIZONS query and download the results. If you are unable to use web functions for some reason, you may need to use an alternative method to obtain the JPL HORIZONS data.

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