© NASA/Cassini

Jupiter at perihelion

Dominic Ford, Editor
From the Outer Planets feed

Objects: Jupiter
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The sky at

Jupiter's 11.9-year orbit around the Sun will carry it to its closest point to the Sun – its perihelion – at a distance of 4.95 AU.

In practice, however, Jupiter's orbit is very close to circular; its distance from the Sun only varies by about 10.2% between perihelion and aphelion. This means that the difference in the amount of heat and light it receives from the Sun between aphelion and perihelion is extremely small.

Finding Jupiter

Jupiter's distance from the Sun doesn't affect its appearance. From Seattle, at the moment of perihelion it will become visible around 17:13 (PDT), 41° above your southern horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 22:29.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.

A chart of the path of Jupiter across the sky in 2023 can be found here, and a chart of its rising and setting times here.

The exact position of Jupiter at the moment it passes perihelion will be:

Object Right Ascension Declination Constellation Magnitude Angular Size
Jupiter 00h16m30s 0°28'N Pisces -2.3 36.2"

The coordinates above are given in J2000.0.

The sky on 21 January 2023
Sunrise
07:49
Sunset
16:53
Twilight ends
18:41
Twilight begins
05:57

29-day old moon
Waxing Crescent

1%

29 days old

Planets
Rise Culm. Set
Mercury 06:17 10:43 15:09
Venus 08:56 13:50 18:44
Moon 08:17 12:25 16:38
Mars 12:27 20:31 04:35
Jupiter 10:17 16:23 22:28
Saturn 08:57 13:55 18:52
All times shown in PST.

Source

The circumstances of this event were computed using the DE430 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).

This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.

Related news

26 Sep 2022  –  Jupiter at opposition
02 Nov 2023  –  Jupiter at opposition
07 Dec 2024  –  Jupiter at opposition
10 Jan 2026  –  Jupiter at opposition

Image credit

© NASA/Cassini

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