Knapp, Gillian R.Tremonti, Christy A.Rockosi, Constance M.Schlegel, David J.Yanny, BrianBeers, Timothy C.Allende Prieto, CarlosWilhelm, RonLupton, Robert H.Gunn, James E.Niederste-Ostholt, MartinSchneider, Donald P.Covey, KevinSeth, AnilIvezic, ZeljkoEisenstein, Daniel J.Helmboldt, JoeFinkbeiner, DouglasPadmanabhan, NikhilKleinman, Scot J.Long, DanSnedden, Stephanie A.Nitta, AtsukoHarvanek, MichaelKrzesinski, JurekBrewington, Howard J.Barentine, John C.Newman, Peter R.Nielsen, Jr., Eric H.Fukugita, MasatakaBrinkmann, J.2017-07-182006Knapp, Gillian R., Christy A. Tremonti, Constance M. Rockosi, David J. Schlegel, Brian Yanny, Timothy C. Beers, Carlos Allende Prieto, et al. 2006. “SDSS J103913.70+533029.7: A Super Star Cluster in the Outskirts of a Galaxy Merger.” The Astronomical Journal 131 (2) (February): 859–865. doi:10.1086/499304.0004-6256http://nrs.harvard.edu/urn-3:HUL.InstRepos:33461893We describe the serendipitous discovery in the spectroscopic data of the Sloan Digital Sky Survey of a starlike object, SDSS J103913.70+533029.7, at a heliocentric radial velocity of +1012 km s-1. Its proximity in position and velocity to the spiral galaxy NGC 3310 suggests an association with the galaxy. At this distance, SDSS J103913.70+533029.7 has the luminosity of a super star cluster and a projected distance of 17 kpc from NGC 3310. Its spectroscopic and photometric properties imply a mass of >106 M⊙ and an age close to that of the tidal shells seen around NGC 3310, suggesting that it formed in the event that formed the shells.en-USgalaxies: formationgalaxies: individual (NGC 3310)galaxies: starburstgalaxies: star clustersJournal Article2017-05-1720062017-07-1810.1086/499304