© NASA/Dawn 2015

1 Ceres at aphelion

Dominic Ford, Editor
From the Dwarf Planets feed

Objects: 1 Ceres
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The sky at

1 Ceres's 4.6-year orbit around the Sun will carry it to its furthest point to the Sun – its aphelion – at a distance of 2.99 AU.

In practice, however, 1 Ceres's orbit is very close to circular; its distance from the Sun only varies by about 17.0% 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 1 Ceres

1 Ceres's distance from the Sun doesn't affect its appearance. From Fairfield, at the moment of aphelion it will be visible between 00:28 and 03:55. It will become accessible around 00:28, when it rises to an altitude of 21° above your south-eastern horizon. It will reach its highest point in the sky at 02:11, 26° above your southern horizon. It will become inaccessible around 03:55 when it sinks below 22° above your south-western horizon.

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 1 Ceres across the sky in 2020 can be found here, and a chart of its rising and setting times here.

The position of 1 Ceres at the moment it passes aphelion will be:

Object Right Ascension Declination Constellation Magnitude Angular Size
1 Ceres 23h02m50s 22°29'S Aquarius 7.9 0.0"

The coordinates above are given in J2000.0.

The sky on 17 August 2020
Twilight ends
Twilight begins

28-day old moon
Waning Crescent


28 days old

Rise Culm. Set
Mercury 06:03 13:00 19:57
Venus 02:30 09:48 17:07
Moon 04:01 11:43 19:20
Mars 22:23 04:45 11:08
Jupiter 17:50 22:28 03:06
Saturn 18:17 23:02 03:46
All times shown in EDT.


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

29 May 2019  –  1 Ceres at opposition
28 Aug 2020  –  1 Ceres at opposition
27 Nov 2021  –  1 Ceres at opposition
11 Dec 2022  –  1 Ceres at perihelion

Image credit

© NASA/Dawn 2015






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