English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We determine accurate positions of the main satellites of Uranus: Miranda,Ariel, Umbriel, Titania, and Oberon. Positions of Uranus, as derived from thoseof these satellites, are also determined. The observational period spans from1992 to 2011. All runs were made at the Pico dos Dias Observatory, Brazil.  We used the software called Platform for Reduction of Astronomical ImagesAutomatically (PRAIA) to minimise (digital coronography) the influence of thescattered light of Uranus on the astrometric measurements and to determineaccurate positions of the main satellites. The positions of Uranus were thenindirectly determined by computing the mean differences between the observedand ephemeris positions of these satellites. A series of numerical filters wasapplied to filter out spurious data. These filters are mostly based on thecomparison between the positions of Oberon with those of the other satellitesand on the offsets as given by the differences between the observed andephemeris positions of all satellites.  We have, for the overall offsets of the five satellites, -29 (+/-63) mas inright ascension and -27 (+/-46) mas in declination. For the overall differencebetween the offsets of Oberon and those of the other satellites, we have +3(+/-30) mas in right ascension and -2 (+/-28) mas in declination. Ephemerispositions for the satellites were determined from DE432+ura111. Comparisonsusing other modern ephemerides for the solar system -INPOP13c- and for themotion of the satellites -NOE-7-2013- were also made. They confirm that thelargest contribution to the offsets we find comes from the motion of thebarycenter of the Uranus system around the barycenter of the solar system, asgiven by the planetary ephemerides. Catalogues with the observed positions areprovided.

Astrometry of the main satellites of Uranus: 18 years of observations