Solar System Phenomena - Selected Minor Planets at Opposition in 2018

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The chart shows the positions selected minor planets at the instants of their oppositions. Only 4 Vesta has the potential to reach naked-eye visiblity but the other large asteroids - 1 Ceres, 2 Pallas and 3 Juno - are visible in small- to medium-sized telescopes. The trans-Neptunian dwarf planets require large telescopes and detailed finder charts, and with the possible of exception of 134340 Pluto, are probably beyond the reach of amateur astronomers. Note that many of these minor planets have relatively large inclinations and may stray far from the ecliptic (which is marked on the chart).

09 January 134340 Pluto conjunction
31 January 1 Ceres opposition in Cancer magnitude +6.9
14 February 3 Juno conjunction
24 March 136472 Makemake opposition in Coma Berenices magnitude +17.1
13 April 136199 Eris conjunction
14 April 136108 Haumea opposition in Boötes magnitude +17.3
19 June 4 Vesta opposition in Sagittarius magnitude +5.3
12 July 134340 Pluto opposition in Sagittarius magnitude +14.2
07 August 2 Pallas conjunction
27 September 136472 Makemake conjunction
07 October 1 Ceres conjunction
16 October 136199 Eris opposition in Cetus magnitude +18.7
18 October 136108 Haumea conjunction
17 November 3 Juno opposition in Eridanus magnitude +7.5


Minor planet positions at opposition are provided by the Minor Planet Center.