10 Distant Quasars (Mike Hamende)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: 49 Leo · NGC 3332 · The star 49Leo

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10 Distant Quasars

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10 Distant Quasars

I took some inspiration from one of johny's recent images and I wanted to see if there were any quasars in any of my own images. I looked at some relatively recent asteroid survey data I had taken with the RASA. When I searched Simbad I found there were over 300 quasars and Seyfert galaxies in this region. There was no way I was going to annotate that many so I decided to limit the search to redshifts z > 3. There were 26 results remaining and I was able to clearly see ten of them with a few others detectable but very faint. Using Ned Wright's Cosmology Calculator I found that the most distant quasar in the image has a light travel time of 11.999 Gyr. It blows my mind that there are distant objects luminous enough that we can see them from our backyards.

This image was taken on the ecliptic so there are more than 800 mostly main belt asteroids in this field as well. If you look closely you may be able to see the trails of a couple bright ones. Some others are visible down to about mag 20.8 but only when using shift and stack.

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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	Advanced success
Started	...
Astrometry.net job	5461608
PixInsight job	YFKSMPYDPN01547SBJYKR9ZJZT8KTPZU
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	10h38m15s.35
RA (top/left)	10h42m25s.79
RA (top/right)	10h41m46s.35
RA (bottom/right)	10h34m06s.67
RA (bottom/left)	10h34m42s.73

Dec (center)	+08°57′18″.3
Dec (top/left)	+10°08′32″.1
Dec (top/right)	+07°38′53″.5
Dec (bottom/right)	+07°45′57″.4
Dec (bottom/left)	+10°15′38″.5

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10 Distant Quasars

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