Jupiter with Callisto & Europa's shadow transit (Niall MacNeill)

Contains: Solar system body or event

Jupiter with Callisto & Europa's shadow transit

The skies cleared for me on the morning of June 13th, for the first time since 26th May. What's more the seeing was excellent for first Saturn and then Jupiter, but fell away dramatically for Mars and Venus.
This is first light for my new Barlow which is the Siebert UV 1.5X. This combined with the ASI 178MM which has small pixels (2.4 microns) and an excellent QE for UV, means I can achieve a good image scale of ~ 0.07 arc secs per pixel at a much shorter focal length (~ 7m). Previously, using my old ASI 174MM I needed a 3X barlow and a focal length of ~ 13m to get an adequate image scale (0.09 "/pxl). The new set up gives a wider FOV and much brighter images, which was particularly beneficial for Saturn. I also used the barlow with the ASI 462MC for Methane Band. Early days yet, but the resolution I achieved was better than previously at Prime Focus. The UV transmissivity of the barlow should, I hope, mean that I can go to the longer focal length for UV on Jupiter and Venus, where I have previously imaged at Prime Focus, with a somewhat compromised image scale.
I also processed the RGB image for Callisto with pleasing results. Callisto, against the black of space, doesn't seem to suffer the edge diffraction effects we see on the brighter moons. The shadow transit is that of Europa.

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	n/a
Started	n/a
Astrometry.net job	n/a
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

Jupiter with Callisto & Europa's shadow transit

Jupiter with Callisto & Europa's shadow transit

Equipment

Acquisition details

Description

Comments

Histogram

Image Index:

Contribution Index (beta):

Jupiter with Callisto & Europa's shadow transit

Jupiter with Callisto & Europa's shadow transit

Equipment

Acquisition details

Description

Comments

Histogram

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information