AGC/UGC 7249     IC 3056     CGCG 069-095     DDO 114     VCC 119

Find the entry of this object in the ALFALFA archive, and use the images and links there to find the answers to these questions. As always, it is most important that you understand how to derive quantitative answers and their uncertainties. Estimate the distance to this galaxy. Do you get the same answer as the value given in the ALFALFA database? Compute the HI mass of the galaxy. Do you get the same answer as the value given in the ALFALFA database? What is odd about the targeting of the SDSS spectra?

SDSS link