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

C/2018 Y1 (Iwamoto) reaches its brightest

Dominic Ford, Editor
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Comet C/2018 Y1 (Iwamoto) is forecast to reach its brightest, at around mag 6.4. It will lie at a distance of 1.29 AU from the Sun, and at a distance of 0.30 AU from the Earth.

From Ashburn, it will be visible between 19:17 and 05:37. It will become accessible around 19:17, when it rises to an altitude of 21° above your eastern horizon. It will reach its highest point in the sky at 00:29, 70° above your southern horizon. It will become inaccessible around 05:37 when it sinks below 22° above your 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.

For more information about its path across the sky, see In-The-Sky.org's ephemeris page for comet C/2018 Y1 (Iwamoto).

This event was automatically generated on the basis of orbital elements published by the Minor Planet Center (MPC) , and is updated whenever new elements become available. It was last updated on 09 Aug 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.

Finding C/2018 Y1 (Iwamoto)

The chart below indicates the path of C/2018 Y1 (Iwamoto) across the sky over the course of its apparition.

It was produced using StarCharter and is available for download, either on dark background, in PNG, PDF or SVG formats, or on a light background, in PNG, PDF or SVG formats.

The position of comet C/2018 Y1 (Iwamoto) at its brightest will be:

Object Right Ascension Declination Constellation Magnitude
Comet C/2018 Y1 (Iwamoto) 09h51m10s +19°28' Leo 6.4

The coordinates are given in J2000.0.

The sky on 13 February 2019
Twilight ends
Twilight begins

9-day old moon
Waxing Gibbous


9 days old

Rise Culm. Set
Mercury 07:39 13:07 18:36
Venus 04:33 09:23 14:13
Moon 11:58 19:01 00:59
Mars 09:42 16:23 23:05
Jupiter 03:06 07:51 12:36
Saturn 04:59 09:45 14:32
All times shown in EST.


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.




Color scheme