== 4.9 Solar system: Surface heterogeneity of trans-neptunian objects == • **Phase** : 4 • **Status** : Draft • **Category** : Science verification / Early science (C8) • **Recurrence** : once after the completion of nighttime testing and performance check • **Duration** : 1 night(s) **Description** • Solar system: Surface heterogeneity of trans-neptunian objects **Prerequisites** • Authorize SHARK-NIR on the SX side. • Atmospheric conditions: CLEAR • Bad pixel map, Background or Dark, Flat-field, distortion map • Cloud Cover : no clouds • Astronomical Seeing : 0.9" or better • Sky Background : Any • Water Vapor : Low • Timing Windows : moving targets with significant variations of magnitude, angular size and proper motion. • Observing Targets : TBD. Transneptunian small objects. • Observing Filters : TBD • Detector Mode, DIT: According to the target brightness • Daytime Calibration Data required: dark/background, flat • Nighttime Calibration Data required: none **Procedure** • Non-coronagraphic observations using filed stabilized observing mode. **Notes** **LBTO support** • SOUL-AO support **Associated SHARK-NIR personnel** **Date performed and by whom**