We 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 > 10 6 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.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science