Celestia Forums

As of very recently Selden Ball's Celestia website gives 403 errors when trying to access it. The site was working as late as June 1st, 2022 judging by the last snapshot of it from the web archive.
If you need anything off of it you will need a copy of the site from the web archive: https://web.archive.org/web/20220601094425/https://www.classe.cornell.edu/~seb/celestia/

Grant Hutchison's orbit conversion spreadsheet is still available through the Wayback Machine, but I'll upload it here too:

I very much hope Selden is okay

This is strange. The Celestia pages cannot be accessed:

https://www.cornell.edu/search/?q=celestia+site:classe.cornell.edu

i thought he retired and that would explain the Univ. site being gone

We can recreate his website here, if there is an agreement reached by all sides...

He has been a regular poster here in recent times

I think he is on Facebook. Any Facebook friends here?

Added after 3 hours 22 minutes:
Selden E. Ball, Jr vCard
General Information
TYPE: retiree
NETID: seb1
EMAIL: seb1@cornell.edu
WEBSITE: https://www.classe.cornell.edu/~seb/
Other Information
CREATED: 21 years ago
MODIFIED: 2 days ago
Personal information appearing (or not appearing) above is subject

https://www.cornell.edu/search/people.cfm?netid=seb1

Selden's website has been back online for a few days now. Forgot to mention it earlier.

Sorry I haven't been present here much lately. There's no reason for my Celestia pages to go away, even if I do Recent outages would have been due to maintenance being done on the networks and servers at the hosting site.

ETA:

Every couple of years there's also a building-wide power outage while work is done on the 13KV power distribution system. Yeah, the building has several 13 KiloVolt feeds from a nearby power substation. They usually aren't all down at the same time, but the building's backup generator has relatively limited capacity. Power outages used to happen occasionally because of squirrels shorting out the substation's capacitor bank, but that stopped when they finally got around to running those lines underground.

Notice of site outage:

My Web pages ( https://www.classe.cornell.edu/~seb etc) will be unavailable starting at about 6 AM US Eastern Time (10 AM UTC) on Friday, July 28, 2023, until about 6 PM (10 PM UTC) on Monday, July 31, due to a building-wide power outage. They're going to be inspecting and cleaning the building's power transformers and switching gear.