Close approach of asteroid (367789) 2011 AG5 (tomwoc)

Contains: Solar system body or event

Close approach of asteroid (367789) 2011 AG5

Link: https://twitter.com/t_wocial/status/1621285917888581633

On Feburary 3rd 2023, asteroid 2011 AG5 passes 4.7 lunar distances from earth. Usually around V band magnitude 25, the 140m body jumped to magnitude 14.3 for a few days. It hit the headlines in 2012 due to a 0.2% probability of collision with earth in 2040, but updated ephemeris have eliminated that risk.

Time lapse consisted of 2.5 hours of 60s subs last night with the C8, 183m and a 495nm longpass filter. Taken from London, UK. After platesolving to a known time/location from NASA horizons, tracking was done with the comet track feature in PHD2, inputting the motion relative to sidereal of +27' ra/hr, -9' dec/hr.

Processing done in Pixinsight. First all subs were comet aligned to the asteroid, then they went through a processing container of: crop (20' FOV), pixelmath offset and scale normalisation to a reference, histogram transform then integer resample. 30 fps GIF made in PIPP meaning one second in the timelapse = 30 minutes in real time.

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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.
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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

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Close approach of asteroid (367789) 2011 AG5

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Close approach of asteroid (367789) 2011 AG5

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