from starplot import MapPlot, Equidistant, _
from starplot.styles import PlotStyle, extensions
style = PlotStyle().extend(
extensions.BLUE_MEDIUM,
extensions.MAP,
)
p = MapPlot(
projection=Equidistant(center_ra=11 * 15),
ra_min=10 * 15,
ra_max=12 * 15,
dec_min=-70,
dec_max=-55,
style=style,
resolution=3600,
scale=1.4,
)
p.gridlines(
ra_locations=[d for d in range(8 * 15, 14 * 15, 5)],
dec_locations=[d for d in range(-50, -80, -2)],
ra_formatter_fn=lambda ra: f"{round(ra * 15)}\u00B0",
)
p.constellations()
p.constellation_borders()
p.stars(where=[_.magnitude < 9], bayer_labels=True, where_labels=[_.magnitude < 5])
def dso_label(d):
if d.common_names:
return d.common_names[0]
if d.ngc:
return d.ngc
if d.ic:
return f"IC{d.ic}"
return d.name
mag_filters = (_.magnitude < 11) | (_.magnitude.isnull())
p.open_clusters(
where=[_.size < 0.2, _.magnitude < 11],
labels=None,
label_fn=dso_label,
true_size=False,
)
with p.style.dso_open_cluster as oc:
oc.label.font_size = 26
oc.label.font_weight = "heavy"
p.open_clusters(
# plot larger clusters as their true apparent size
where=[_.size > 0.2, mag_filters],
label_fn=dso_label,
)
p.nebula(
where=[mag_filters, _.size < 0.2],
label_fn=dso_label,
true_size=False,
)
with p.style.dso_nebula as neb:
neb.label.font_size = 26
neb.label.font_weight = "heavy"
p.nebula(
where=[mag_filters, _.size > 0.2],
label_fn=dso_label,
)
p.galaxies(
where=[mag_filters],
label_fn=dso_label,
true_size=False,
)
p.constellation_labels()
p.legend(
style__alignment="left",
style__location="outside right upper",
style__padding_x=-250,
style__num_columns=1,
)
p.star_magnitude_scale(
style__alignment="left",
style__num_columns=1,
add_to_legend=True,
start=0,
stop=9,
step=1,
)
p.export("map_carina.png", padding=0.5)
