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

Comet C/2024 S1 (ATLAS) passes perihelion

Dominic Ford, Editor
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Comet C/2024 S1 (ATLAS) will make its closest approach to the Sun on 28 October, at a distance of 0.01 AU.

From San Diego on the day of perihelion it will not be readily observable since it will be very close to the Sun, at a separation of only 0° from it.

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

The events that comprise the 2024 apparition of C/2024 S1 (ATLAS) are as follows:

Date Event
23 Oct 2024Comet C/2024 S1 (ATLAS) passes perigee
28 Oct 2024Comet C/2024 S1 (ATLAS) passes perihelion

The table below lists the times when C/2024 S1 (ATLAS) will be visible from San Diego day-by-day through its apparition:

Date Constellation Comet visibility
07 Oct 2024HydraNot observable
09 Oct 2024HydraNot observable
11 Oct 2024HydraNot observable
13 Oct 2024HydraNot observable
15 Oct 2024CraterNot observable
17 Oct 2024CraterNot observable
19 Oct 2024CraterNot observable
21 Oct 2024CorvusNot observable
23 Oct 2024CorvusNot observable
25 Oct 2024VirgoNot observable
27 Oct 2024VirgoNot observable
29 Oct 2024VirgoNot observable
31 Oct 2024VirgoNot observable
02 Nov 2024VirgoNot observable
04 Nov 2024VirgoNot observable
06 Nov 2024CorvusNot observable
08 Nov 2024CorvusNot observable
10 Nov 2024CorvusNot observable
12 Nov 2024CorvusNot observable
14 Nov 2024HydraNot observable
16 Nov 2024HydraNot observable

A more detailed table of C/2024 S1 (ATLAS)'s position on each night is available here. A diagram of the orbit of C/2024 S1 (ATLAS) is available here.

Finder chart

The chart below shows the path of C/2024 S1 (ATLAS) 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 -19 on 28 October 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.

The comet's position at perihelion will be:

Object Right Ascension Declination Constellation Magnitude
Comet C/2024 S1 (ATLAS) 14h13m00s 13°04'S Virgo -19.0

The coordinates are given in J2000.0.

The sky on 28 Oct 2024

The sky on 28 October 2024
Sunrise
07:00
Sunset
18:00
Twilight ends
19:23
Twilight begins
05:37

26-day old moon
Waning Crescent

8%

26 days old

Planets
Rise Culm. Set
Mercury 08:27 13:36 18:45
Venus 10:05 15:02 19:59
Moon 03:39 09:57 16:08
Mars 23:14 06:17 13:20
Jupiter 20:33 03:37 10:42
Saturn 15:35 21:15 02:55
All times shown in PDT.

Warning

Never attempt to point a pair of binoculars or a telescope at an object close to the Sun. Doing so may result in immediate and permanent blindness.

Source

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 26 Oct 2024.

Image credit

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

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32.72°N
117.16°W
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