© 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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Comet 22P/Kopff will make its closest approach to the Sun on 17 July, at a distance of 1.53 AU.

From Fairfield on the day of perihelion it will be visible in the evening sky, becoming accessible around 21:44 (EST), 28° above your southern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 22:34, 29° above your southern horizon. It will continue to be observable until around 00:48, when it sinks below 21° above your south-western horizon.

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The events that comprise the 2009 apparition of 22P/Kopff are as follows:

Date Event
17 Jul 2009Comet 22P/Kopff passes perihelion

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

Date Constellation Comet visibility
26 Jun 2009OphiuchusVisible from 21:55 until 02:33
Highest at 23:45, 33° above S horizon
28 Jun 2009OphiuchusVisible from 21:55 until 02:24
Highest at 23:37, 33° above S horizon
30 Jun 2009OphiuchusVisible from 21:54 until 02:15
Highest at 23:29, 32° above S horizon
02 Jul 2009OphiuchusVisible from 21:54 until 02:05
Highest at 23:22, 32° above S horizon
04 Jul 2009OphiuchusVisible from 21:53 until 01:56
Highest at 23:15, 32° above S horizon
06 Jul 2009OphiuchusVisible from 21:52 until 01:46
Highest at 23:07, 31° above S horizon
08 Jul 2009OphiuchusVisible from 21:51 until 01:37
Highest at 23:00, 31° above S horizon
10 Jul 2009OphiuchusVisible from 21:50 until 01:27
Highest at 22:53, 31° above S horizon
12 Jul 2009OphiuchusVisible from 21:48 until 01:18
Highest at 22:47, 30° above S horizon
14 Jul 2009OphiuchusVisible from 21:46 until 01:09
Highest at 22:40, 30° above S horizon
16 Jul 2009OphiuchusVisible from 21:45 until 00:59
Highest at 22:34, 30° above S horizon
18 Jul 2009OphiuchusVisible from 21:43 until 00:50
Highest at 22:27, 29° above S horizon
20 Jul 2009OphiuchusVisible from 21:41 until 00:40
Highest at 22:21, 29° above S horizon
22 Jul 2009OphiuchusVisible from 21:38 until 00:31
Highest at 22:15, 29° above S horizon
24 Jul 2009OphiuchusVisible from 21:36 until 00:22
Highest at 22:09, 28° above S horizon
26 Jul 2009OphiuchusVisible from 21:34 until 00:13
Highest at 22:04, 28° above S horizon
28 Jul 2009OphiuchusVisible from 21:31 until 00:03
Highest at 21:58, 28° above S horizon
30 Jul 2009OphiuchusVisible from 21:28 until 23:54
Highest at 21:53, 27° above S horizon
01 Aug 2009OphiuchusVisible from 21:26 until 23:45
Highest at 21:48, 27° above S horizon
03 Aug 2009OphiuchusVisible from 21:23 until 23:36
Highest at 21:43, 27° above S horizon
05 Aug 2009SagittariusVisible from 21:20 until 23:27
Highest at 21:38, 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.

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 17h25m50s 19°24'S Ophiuchus 7.5

The coordinates are given in J2000.0.

The sky on 15 Dec 2024

The sky on 15 December 2024
Sunrise
07:09
Sunset
16:24
Twilight ends
18:04
Twilight begins
05:29

14-day old moon
Waning Gibbous

99%

14 days old

Planets
Rise Culm. Set
Mercury 05:37 10:32 15:28
Venus 10:13 15:02 19:51
Moon 16:30 00:35 08:41
Mars 19:22 02:49 10:15
Jupiter 15:40 23:06 06:32
Saturn 11:40 17:13 22:46
All times shown in EST.

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 10 Dec 2024.

Image credit

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

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Fairfield

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Longitude:
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41.14°N
73.26°W
EST

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