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

22P/Kopff at perihelion

Dominic Ford, Editor
From the Comets feed

Objects: 22P/Kopff
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Comet 22P/Kopff will make its closest approach to the Sun, at a distance of 1.55 AU.

From Ashburn the 2028 apparition of 22P/Kopff will progress as follows:

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.
05 Aug 2028 – 22P/Kopff at perihelion
15 Jul 2028LibraVisible from 21:53 until 00:28
Highest at 21:53, 35° above S horizon
17 Jul 2028ScorpiusVisible from 21:53 until 00:22
Highest at 21:53, 35° above S horizon
19 Jul 2028ScorpiusVisible from 21:49 until 00:13
Highest at 21:49, 34° above S horizon
21 Jul 2028ScorpiusVisible from 21:49 until 00:08
Highest at 21:49, 34° above S horizon
23 Jul 2028ScorpiusVisible from 21:45 until 23:59
Highest at 21:45, 33° above S horizon
25 Jul 2028ScorpiusVisible from 21:44 until 23:50
Highest at 21:44, 33° above S horizon
27 Jul 2028ScorpiusVisible from 21:40 until 23:42
Highest at 21:40, 33° above S horizon
29 Jul 2028ScorpiusVisible from 21:40 until 23:38
Highest at 21:40, 32° above S horizon
31 Jul 2028OphiuchusVisible from 21:35 until 23:30
Highest at 21:35, 32° above S horizon
02 Aug 2028ScorpiusVisible from 21:35 until 23:23
Highest at 21:35, 31° above S horizon
04 Aug 2028OphiuchusVisible from 21:30 until 23:15
Highest at 21:30, 31° above S horizon
06 Aug 2028OphiuchusVisible from 21:30 until 23:08
Highest at 21:30, 30° above S horizon
08 Aug 2028OphiuchusVisible from 21:25 until 23:02
Highest at 21:25, 30° above S horizon
10 Aug 2028OphiuchusVisible from 21:24 until 22:55
Highest at 21:24, 29° above S horizon
12 Aug 2028OphiuchusVisible from 21:19 until 22:49
Highest at 21:19, 29° above S horizon
14 Aug 2028OphiuchusVisible from 21:18 until 22:43
Highest at 21:18, 29° above S horizon
16 Aug 2028OphiuchusVisible from 21:13 until 22:37
Highest at 21:13, 28° above S horizon
18 Aug 2028OphiuchusVisible from 21:12 until 22:32
Highest at 21:12, 28° above S horizon
20 Aug 2028OphiuchusVisible from 21:07 until 22:26
Highest at 21:07, 28° above S horizon
22 Aug 2028OphiuchusVisible from 21:06 until 22:21
Highest at 21:06, 28° above S horizon
24 Aug 2028OphiuchusVisible from 21:00 until 22:13
Highest at 21:00, 27° above S horizon

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.

At the moment of perihelion it will become visible around 21:30 (EST), 30° above your southern horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 01:34.

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 16h26m00s 19°02'S Scorpius 8.3

The coordinates are given in J2000.0.

The sky on 05 August 2028
Twilight ends
Twilight begins

14-day old moon
Waning Gibbous


14 days old

Rise Culm. Set
Mercury 07:09 14:01 20:54
Venus 02:53 10:04 17:15
Moon 19:55 01:08 06:27
Mars 03:30 10:56 18:23
Jupiter 09:46 15:58 22:09
Saturn 00:02 06:48 13:33
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 15 Mar 2021.

Image credit

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






Color scheme