Coragyps

Do any of you astronomers out there remember......
There has been a measurement of the distance to a galaxy done by measuring the lateral motion of a radio "knot" on the object's equatorial disk, together with measuring the speed of rotation by Doppler shifts of the approaching and receding edges. They came up with 28 million light years, IIRC. Something about it was posted here at II a couple of years back; the paper was on the LANL server, maybe published in the late 90's. I'd like to find it to whup on some young-earthers with, but I don't remember any more than that....

Friar Bellows

I'm not an astronomer, but I went to the arXiv.org search page, chose the "All Years" option and searched for "proper motion doppler distance". I found the following paper:

Direct Distance Measurements to Superluminal Radio Sources by D. C. Homan and J. F. C. Wardle.

OK, so it's not quite late 90's (it's 2000), the object is not quite a galaxy (it's a quasar), and the distance is not quite 28 million light years (more like several billion light years). Oh well, that's the best I could do.