2023 April 18 Sun - Solar surface in white-light, with AR13272, AR13273, AR13275, AR13276, AR13277, AR13279, AR13280, AR

[PTS]

2023 April 18 Sun - Solar surface in white-light, with AR13272, AR13273, AR13275, AR13276, AR13277, AR13279, AR13280, AR13281, AR13282, AR13283 and AR13284.

Observation through clouds.

AR13272, appears at (S22W72). About 4 sunspots are observed. All are embedded in faculae.
AR13273, shows up at (N08W81). No sunspot is observed, leaving just some faculae.
AR13275, shows up at (N19W33). 2 sunspots are observed, embedded in faculae.
AR13276, shows up at (S22W20). 1 sunspot is observed, embedded in faculae.
AR13277, shows up at (N10W59). No sunspot is observed, leaving just some faculae.
AR13279, shows up at (S19W06). At least 13 sunspots are observed, embedded in faculae. The following sunspot comes with penumbra and split umbra.
AR13280, shows up at (S08W81). A sunspot is observed, embedded in faculae.
AR13281, shows up at (S22E13). About 10 sunspots are observed, all embedded in faculae. The leading and following sunspots come with penumbra and split umbra.
AR13282, shows up at (N11E10). About 15 sunspots are observed, all embedded in faculae. The leading and following sunspots come with penumbra and split umbra.
AR13283, shows up at (S20E36). About 4 sunspots are observed, all embedded in faculae.
AR13284 is located at (S08E70). 5 sunspots , embedded in faculae, are observed. The following sunspot comes with penumbra and split umbra.

Sunspot count: group=9, sunspot=55, R=145

Telescope: Baader Triband C9.25 solar telescope, 235 mm f/10 with Meade 0.63X reducer for whole-disc.
Camera : ASI1600MM Pro, cooled to -7.0C.
Filters: Baader Solar Film 3.8.

approximately north is up, east to the left.

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Images of AR13273, AR13275 and AR13277

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Images of AR13276

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Images of AR13279

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Images of AR13280

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Images of AR13281

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Images of AR13282

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Images of AR13283 and AR13284

[Eddy So]