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

Comet 154P/Brewington passes perihelion

Dominic Ford, Editor
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Comet 154P/Brewington will make its closest approach to the Sun on 11 June, at a distance of 1.55 AU.

From Ashburn on the day of perihelion it will not be observable – it will reach its highest point in the sky during daytime and will be no higher than 11° above the horizon at dawn.

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The events that comprise the 2024 apparition of 154P/Brewington are as follows:

Date Event
11 Jun 2024Comet 154P/Brewington passes perihelion

The table below lists the times when 154P/Brewington will be visible from Ashburn day-by-day through its apparition:

Date Constellation Comet visibility
21 May 2024AriesNot observable
23 May 2024AriesNot observable
25 May 2024AriesNot observable
27 May 2024AriesNot observable
29 May 2024AriesNot observable
31 May 2024AriesNot observable
02 Jun 2024AriesNot observable
04 Jun 2024AriesNot observable
06 Jun 2024AriesNot observable
08 Jun 2024AriesNot observable
10 Jun 2024AriesNot observable
12 Jun 2024AriesNot observable
14 Jun 2024AriesNot observable
16 Jun 2024AriesNot observable
18 Jun 2024AriesNot observable
20 Jun 2024TaurusNot observable
22 Jun 2024TaurusNot observable
24 Jun 2024TaurusNot observable
26 Jun 2024TaurusNot observable
28 Jun 2024TaurusNot observable
30 Jun 2024PerseusNot observable

A more detailed table of 154P/Brewington's position on each night is available here. A diagram of the orbit of 154P/Brewington is available here.

Finder chart

The chart below shows the path of 154P/Brewington over the course of its apparition, as calculated from the orbital elements published by the Minor Planet Center (MPC). It 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. It was produced using StarCharter.

Comet brightnesses

Comets are intrinsically highly unpredictable objects, since their brightness depends on the scattering of sunlight from dust particles in the comet's coma and tail. This dust is continually streaming away from the comet's nucleus, and its density at any particular time is governed by the rate of sublimation of the ice in the comet's nucleus, as it is heated by the Sun's rays. It also depends on the amount of dust that is mixed in with that ice. This is very difficult to predict in advance, and can be highly variable even between successive apparitions of the same comet.

In consequence, while the future positions of comets are usually known with a high degree of confidence, their future brightnesses are not. For most comets, we do not publish any magnitude estimates at all. For the few comets where we do make estimates, we generally prefer the BAA's magnitude parameters to those published by the Minor Planet Center, since they are typically updated more often.

Based on the magnitude parameters published for this comet by the BAA Comet Section, we estimate that it may be around mag 11 on 11 June 2024. This estimate is based on observations that the BAA has received from amateur astronomers, assuming that its current level of activity will remain constant.

You will probably require a telescope to see this comet. It is unlikely to be visible through bird-watching binoculars, and even less likely to be visible to the unaided eye.

The comet's position at perihelion will be:

Object Right Ascension Declination Constellation Magnitude
Comet 154P/Brewington 02h59m00s 26°01'N Aries 11.3

The coordinates are given in J2000.0.

The sky on 11 Jun 2024

The sky on 11 June 2024
Twilight ends
Twilight begins

5-day old moon
Waxing Crescent


5 days old

Rise Culm. Set
Mercury 05:26 12:51 20:16
Venus 05:50 13:16 20:42
Moon 10:29 17:43 00:46
Mars 03:08 09:47 16:26
Jupiter 04:42 11:54 19:07
Saturn 01:27 07:10 12:53
All times shown in EDT.


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 27 Sep 2023.

Image credit

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





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