Nytecam 51N 0.1W Meade 30cm LX200 astrograph+C8+Ha+CaK PSTs+spectrographs SX M9+Lodestar-C+M CCDs/Canon 1100D DSLR My Meade astrograph-colour deepsky My supernova discovery My dome build/spectroscopes/DSO images/Lodestar colour images & videos
WO Megrez 90mm, Porta II
SW 200mm, SW 100mm ED, EQ5
Nikon Action EX 8x40, Fujinon Polaris 10x50
Garrett Signature 15x70
Quote:This galaxy is close enough (distance modulus around 30.7, so a distance of around 14 Mpc) that we _could_ measure its distance in several ways: via Cepheids (with difficulty), the globular cluster luminosity function, the tip of the red giant branch (with difficulty), the planetary nebula luminosity function. It's a bit surprising to me that the only distance listed in NEDhttp://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=ngc7250&extend=no&a...for this galaxy is based on the Tully-Fisher technique. I guess there are just a LOT of galaxies in this distance range out there, and no one has cared about NGC 7250 enough to put it near the top of the list.This SN will probably encourage someone to use one or more of the methods listed above to determine its distance more carefully.
I want to do more then just look.