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

Comet 22P/Kopff passes perihelion

Dominic Ford, Editor
From the Comets feed

Objects: 22P/Kopff
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The sky at

Comet 22P/Kopff will make its closest approach to the Sun on 18 March, at a distance of 1.54 AU.

From San Diego 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 13° above the horizon at dawn.

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 2022 apparition of 22P/Kopff are as follows:

Date Event
18 Mar 2022Comet 22P/Kopff passes perihelion

The table below lists the times when 22P/Kopff will be visible from San Diego day-by-day through its apparition:

Date Constellation Comet visibility
25 Feb 2022SagittariusNot observable
27 Feb 2022SagittariusNot observable
01 Mar 2022SagittariusNot observable
03 Mar 2022CapricornusNot observable
05 Mar 2022CapricornusNot observable
07 Mar 2022CapricornusNot observable
09 Mar 2022CapricornusNot observable
11 Mar 2022CapricornusNot observable
13 Mar 2022CapricornusNot observable
15 Mar 2022CapricornusNot observable
17 Mar 2022CapricornusNot observable
19 Mar 2022CapricornusNot observable
21 Mar 2022CapricornusNot observable
23 Mar 2022CapricornusNot observable
25 Mar 2022CapricornusNot observable
27 Mar 2022CapricornusNot observable
29 Mar 2022CapricornusNot observable
31 Mar 2022CapricornusNot observable
02 Apr 2022CapricornusNot observable
04 Apr 2022CapricornusNot observable
06 Apr 2022CapricornusNot observable

A more detailed table of 22P/Kopff's position on each night is available here. A diagram of the orbit of 22P/Kopff is available here.

Finder chart

The chart below shows the path of 22P/Kopff 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.

No estimate for the brightness of comet 22P/Kopff is currently available.

The comet's position at perihelion will be:

Object Right Ascension Declination Constellation Magnitude
Comet 22P/Kopff 20h53m40s 16°22'S Capricornus 10.3

The coordinates are given in J2000.0.

The sky on 18 Mar 2022

The sky on 18 March 2022
Twilight ends
Twilight begins

16-day old moon
Waning Gibbous


16 days old

Rise Culm. Set
Mercury 06:26 12:08 17:49
Venus 04:33 09:56 15:18
Moon 18:34 01:03 07:23
Mars 04:39 09:50 15:02
Jupiter 06:32 12:20 18:08
Saturn 05:14 10:36 15:57
All times shown in PDT.


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 Apr 2024.

Image credit

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


San Diego



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