Jupiter Apparition - Opposition 2018 MAY 08

A plotting of the planet in equatorial coordinates of current date during 2017 DEC 12 to 2018 OCT 06 - See article below.

Jupiter Declination - 2012-23

A plotting of the declinations of the planet at oppositions from 2012 to 2013

Jupiter Stellar Magnitude - 2017-18

Graph of the brightness of Jupiter measured in stellar magnitude

Jupiter 01 Jupiter 02 Jupiter 11 Jupiter 07

                  2017-18 APPARITION OF JUPITER

Giant Jupiter appears in the predawn eastern sky following its conjunction behind the Sun on 2017 OCT 26. Western quadrature (90° from Sun) will be reached on 2018 FEB 10. Apparent retrograde motion in right ascension will begin on MAR 09.

  Opposition from the Sun will occur on 2018 MAY 08 with Jupiter in the sky all night. At that time it will be in the constellation Libra at a declination of 16.1° south of the celestial equator. Its south pole will be tilted by 3.4° toward Earth. The orbital planes of its four great Galilean satellites are similarly tilted. Greatest brilliance for this apparition is expected around MAY 09 at stellar magnitude -2.5. Jupiter’s closest approach to Earth of 4.3998 AU will occur on MAY 10 while subtending an equatorial angular diameter of 44.8 arcseconds.

   Apparent direct motion in right ascension will resume on 2018 JUL 10. Eastern quadrature will be reached on AUG 06 before conjunction behind the Sun on NOV 26.

  Jupiter will appear near other bright planets on the following dates: Mars 2018 JAN 06 & Mercury OCT 29. It will not conjunct any first magnitude stars.

  The Moon will appear near Jupiter on 2017 DEC 14, 2018 JAN 11, FEB 07, MAR 07, APR 03, APR 30, MAY 27, JUN 23, JUL 20, AUG 17, SEP 13 OCT 11 & NOV 08. There will be no lunar occultations of Jupiter during this apparition.

NOTES: Event dates in this article are for North American Central Time. Galilean satellite positions are calculated utilizing the high accuracy algorithm of Jay H. Lieske.

*  A meridian transit occurs when a celestial body crosses an observer’s local north-south line in the sky. That is practically simultaneous with culmination, i.e. the highest altitude for the day. The Jupiter meridian transit times in the above linked graph can be easily transformed for your location. The given times are nearly the same for the central meridians of all time zones, i.e. those evenly divisible by 15° such as 75°, 90°, 105° or 120°. Do not adjust to UT. Simply add to the chart time 4 minutes for each degree west of a central meridian, or subtract 4 minutes for each degree to the east. If on daylight savings time, add an hour.



Jupiter 08

Galilean Satellites - Nightly Event Timetable

Nightly timetable for events involving the four Galilean satellites of Jupiter and their shadows

Jupiter 09 Jupiter 10

Jupiter Angular Diameter - 2017-18

Graph of equatorial angular diameter of Jupiter measured in arcseconds - Distance in AU = 196.88 / angular diameter

Jupiter 03 Jupiter 04

Jupiter Illumination Phase - 2017-18

Graph of the percentage of Jupiter’s apparent disk illuminated

Jupiter Apparent Axial Tilt Graph - 2017-18

Graph of the tilt of Jupiter’s rotational axis as viewed from Earth Similar tilts for the orbital planes of its four Galilean satellites

Jupiter Meridian Transit Time* - 2017-18

Graph of the times that the planet Jupiter transits the prime meridian

Jupiter 05

Galilean Satellites - Nightly Array Graphic

Nightly preview graphic depicting the four Galilean satellites of Jupiter and their shadows

Jupiter 06

© Curt Renz


Shadow Transit - Overhead View - DEC 25

Preview of #2 Europa and its shadow transiting Jupiter during the predawn hours as viewed from above Jupiter’s north pole

Shadow Transit - View from Earth - DEC 25

Preview of #2 Europa and its shadow transiting Jupiter during the predawn hours as viewed from Earth

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