Is a secret ballot at the end of the Impeachment trial no longer possible?

[SCantiGOP]

A few weeks ago, there was speculation that a majority vote (50 Dems and the VP) could order that the final vote be by secret ballot. Several articles pointed out that this win for the Dems could also be a boon for the GOP, since they could remove Trump from future contention while not having to acknowledge their individual vote. Some articles even speculated that a genuine secret vote could get 80 plus votes, meaning a majority of the R's.
I haven't heard any speculation on this since the trial began, so my assumption is that this would have needed to be in the original agreement on conducting the proceedings.
Anyone have any ideas if this could still be a possibility, albeit very much a long-shot?

[Tribetime]

1. Yes I had wondered about that but I'd rather see the Senators go on record

And kill their own political future

[SCantiGOP]

2. I kind of agree, but

How satisfying would a 82-18 final vote be????

[TwilightZone]

3. Nope, it requires 81 Senators in agreement.

Only 20 Senators are required to force it into public record.

https://www.democraticunderground.com/100215070977#post7