© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.

C/2018 R3 (Lemmon) reaches its brightest

Dominic Ford, Editor
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Comet C/2018 R3 (Lemmon) is forecast to reach its brightest, at around mag 10.8. It will lie at a distance of 1.29 AU from the Sun, and at a distance of 1.94 AU from the Earth.

From Cambridge however, it will not be observable – it will reach its highest point in the sky during daytime and will be no higher than 20° above the horizon at dusk.

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

For more information about its path across the sky, see In-The-Sky.org's ephemeris page for comet C/2018 R3 (Lemmon).

This event was automatically generated on the basis of orbital elements published by the Minor Planet Center (MPC), and is updated daily (last update, 17 Jun 2019).

Note that the future positions of comets are typically known with a high degree of confidence, but their brightnesses are often much more unpredictable, since it is impossible to predict with certainty how they will respond as they move closer to the Sun. Magnitude estimates should be assumed to be highly provisional more than a few weeks in advance.

Printable finder charts

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The exact position of comet C/2018 R3 (Lemmon) will be:

Object Right Ascension Declination Constellation Magnitude
Comet C/2018 R3 (Lemmon) 05h07m00s +59°25' Camelopardalis 10.8

The coordinates are given in J2000.0.

The sky on 02 June 2019
Twilight ends
Twilight begins

29-day old moon
Waning Crescent


29 days old

Rise Culm. Set
Mercury 05:56 13:41 21:27
Venus 04:12 11:20 18:28
Moon 04:56 12:03 19:11
Mars 07:09 14:49 22:29
Jupiter 20:41 01:20 05:55
Saturn 22:43 03:26 08:04
All times shown in EDT.


The circumstances of this event were computed using the DE405 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.

Image credit

© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.




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