M45 / Pleiades

NamePleiades
Designation(s)M45
Object Type(s)Open Cluster
Relevant Catalog(s)All (Chron), Messier
Obs. Lat/Long42° 17', 073° 57'
ConstellationTaurus
Date and Time Observed2023-11-16 22:24:00
InstrumentAskar V, 60mm f4.5 270mm
CameraASI294mc-Pro
Image DetailsUp is 204.5 degrees E of N. Total integration time was 51m. Exposures 30s@305g, UV/IR Cut Filter. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding..
DescriptionThe fourth and final addition to the catalog that Messier made pre-publication: "(March 4, 1769) `A cluster of stars, known by the name of the Pleiades. The position reported is that of the star Alcyone.'" This is an obvious, naked-object known since ancient times. <--> The Pleiades was the first asterism I ever noticed, myself. Walking home at night when I was 10 or so, I saw the seven sisters formation and decided it had to be UFOs. Someone set me straight, and I learned their name, Pleiades, but I loved them still. Through a telescope they're even more wonderful because of the dramatic nebulosity that surrounds the major stars. This first observation through a telescope was at 270mm, but I have added a second observation, Dec 12, 2023, 15m30s to the gallery, taken with the Askar V at 600mm. Interestingly, the "seven" sisters has only six naked-eye objects visible. It is believed that the seventh sister was an optical binary that has shifted relative position so it is no longer visible.
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