Cees Bassa
@cbassa.bsky.social
Astronomer at ASTRON in the Netherlands, working with the LOFAR low frequency radio telescope.
This video shows the Moon occulting several stars from the Pleiades star cluster (M45) earlier this evening. The 40 minute observing run is condensed into 40 seconds. The brightest star is Merope (23 Tau) at magnitude 4.2. Now to work through 20GB of timestamped images to extract occultation times.
April 1, 2025 at 10:11 PM
This video shows the Moon occulting several stars from the Pleiades star cluster (M45) earlier this evening. The 40 minute observing run is condensed into 40 seconds. The brightest star is Merope (23 Tau) at magnitude 4.2. Now to work through 20GB of timestamped images to extract occultation times.
Some how I completely missed the fact that the Moon was going to occult several of the stars in the Pleiades. I managed to quickly put together a CMOS camera and a 300mm lens to capture the motion of the Moon across these stars at 10fps. Here's the occultation of the 8th magnitude star HD23361.
April 1, 2025 at 9:41 PM
Some how I completely missed the fact that the Moon was going to occult several of the stars in the Pleiades. I managed to quickly put together a CMOS camera and a 300mm lens to capture the motion of the Moon across these stars at 10fps. Here's the occultation of the 8th magnitude star HD23361.
For those in Western Europe, check out the Western sky right now! There's some green cloud display happening. This is a video of the last 30 mins (19:30 to 20:00UTC). It's unclear to me if these are Northern Lights or some freak Noctilucent Clouds.
February 28, 2025 at 8:09 PM
For those in Western Europe, check out the Western sky right now! There's some green cloud display happening. This is a video of the last 30 mins (19:30 to 20:00UTC). It's unclear to me if these are Northern Lights or some freak Noctilucent Clouds.
The year-long keogram is constructed from daily keograms, where each daily keogram takes the central pixel column of the all-sky images of each successive image to show motion in the sky. This video shows the all-sky images for a 24h time span and the resulting keogram shown below.
January 4, 2025 at 1:59 PM
The year-long keogram is constructed from daily keograms, where each daily keogram takes the central pixel column of the all-sky images of each successive image to show motion in the sky. This video shows the all-sky images for a 24h time span and the resulting keogram shown below.