2 replies to this topic

[symbiosis]

Just curious -- are there any IOTA folks who worked/are working on observations of the asteroid? It's magnitude 23 right now, but was brighter earlier.

Edited by symbiosis, 07 February 2025 - 07:04 AM.

[UWastronomer]

I noticed the jpl sentry site stopped updating daily observations. Last was Feb 8th, but the system is still running calculations daily with no new data to change the result.

 

https://cneos.jpl.na...l#?des=2024 YR4

 

Perhaps it is now too dim? Are we waiting for existing scheduled observations to be completed?

 

JWST could see down to magnitude 34 with a 12.5 hour long exposure. That is 1/20th the duration of Hubbles' deep field. Hubble saw down to magnitude 31 with that long of an exposure. I am guessing JWST could track the estimated position of 2024 YR4 to go even lower?

[symbiosis]

I noticed the jpl sentry site stopped updating daily observations. Last was Feb 8th, but the system is still running calculations daily with no new data to change the result.

 

https://cneos.jpl.na...l#?des=2024 YR4

 

Perhaps it is now too dim? Are we waiting for existing scheduled observations to be completed?

 

JWST could see down to magnitude 34 with a 12.5 hour long exposure. That is 1/20th the duration of Hubbles' deep field. Hubble saw down to magnitude 31 with that long of an exposure. I am guessing JWST could track the estimated position of 2024 YR4 to go even lower?

A few weeks ago it was already at magnitude 23. Some reports are that it will be too dim by the end of the month for even the largest ground-based scopes -- some others say it could be as late as April.