In July 2016, NASA's New Horizons spacecraft imaged the possible dwarf planet (307261) 2002 MS4, from a distance of 15.3au (2.3 billion km, 1.4 billion mi). At the time, the object was visible at apparent magnitude +19.4 from the position of the spacecraft, in the direction of the constellation Hercules.
NASA, JHUAPL, SwRI, Daniel Bamberger
2019-11-13
NASA New Horizons images of 2002 MS4, processed by myself from the raw data, available at <a rel="nofollow" class="external free" href="https://tools.pds-rings.seti.org/opus/#/target=2002+MS4&amp;cols=opusid,instrument,planet,target,time1,observationduration&amp;widgets=target&amp;order=time1,opusid&amp;view=browse&amp;browse=gallery&amp;cart_browse=gallery&amp;startobs=1&amp;cart_startobs=1&amp;detail=">https://tools.pds-rings.seti.org/opus/#/target=2002+MS4&amp;cols=opusid,instrument,planet,target,time1,observationduration&amp;widgets=target&amp;order=time1,opusid&amp;view=browse&amp;browse=gallery&amp;cart_browse=gallery&amp;startobs=1&amp;cart_startobs=1&amp;detail=</a>