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

Comet 58P/Jackson-Neujmin passes perihelion

Dominic Ford, Editor
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Comet 58P/Jackson-Neujmin will make its closest approach to the Sun on 2 September, at a distance of 1.38 AU.

From Cambridge on the day of perihelion it will be visible in the morning sky, becoming accessible around 00:17, when it reaches an altitude of 21° above your eastern horizon. It will then reach its highest point in the sky at 04:27, 50° above your southern horizon. It will be lost to dawn twilight around 04:58, 49° above your southern horizon.

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The events that comprise the 2028 apparition of 58P/Jackson-Neujmin are as follows:

Date Event
02 Sep 2028Comet 58P/Jackson-Neujmin passes perihelion
11 Sep 2028Comet 58P/Jackson-Neujmin reaches peak brightness
21 Sep 2028Comet 58P/Jackson-Neujmin passes perigee

The table below lists the times when 58P/Jackson-Neujmin will be visible from Cambridge day-by-day through its apparition:

Date Constellation Comet visibility
12 Aug 2028PiscesVisible from 00:16 until 04:30
Highest at 04:30, 54° above S horizon
14 Aug 2028PiscesVisible from 00:15 until 04:33
Highest at 04:33, 54° above S horizon
16 Aug 2028PiscesVisible from 00:14 until 04:36
Highest at 04:36, 54° above S horizon
18 Aug 2028PiscesVisible from 00:13 until 04:39
Highest at 04:39, 54° above S horizon
20 Aug 2028PiscesVisible from 00:12 until 04:41
Highest at 04:39, 53° above S horizon
22 Aug 2028PiscesVisible from 00:11 until 04:44
Highest at 04:38, 53° above S horizon
24 Aug 2028PiscesVisible from 00:10 until 04:47
Highest at 04:36, 52° above S horizon
26 Aug 2028CetusVisible from 00:10 until 04:49
Highest at 04:34, 52° above S horizon
28 Aug 2028CetusVisible from 00:09 until 04:52
Highest at 04:32, 51° above S horizon
30 Aug 2028CetusVisible from 00:09 until 04:54
Highest at 04:29, 51° above S horizon
01 Sep 2028CetusVisible from 00:08 until 04:57
Highest at 04:27, 50° above S horizon
03 Sep 2028CetusVisible from 00:08 until 04:59
Highest at 04:24, 50° above S horizon
05 Sep 2028CetusVisible from 00:07 until 05:02
Highest at 04:22, 49° above S horizon
07 Sep 2028CetusVisible from 00:07 until 05:04
Highest at 04:19, 49° above S horizon
09 Sep 2028CetusVisible from 00:06 until 05:07
Highest at 04:16, 48° above S horizon
11 Sep 2028CetusVisible from 00:05 until 05:09
Highest at 04:12, 47° above S horizon
13 Sep 2028CetusVisible from 00:05 until 05:12
Highest at 04:09, 47° above S horizon
15 Sep 2028EridanusVisible from 00:04 until 05:14
Highest at 04:05, 46° above S horizon
17 Sep 2028EridanusVisible from 00:03 until 05:16
Highest at 04:01, 45° above S horizon
19 Sep 2028EridanusVisible from 00:01 until 05:19
Highest at 03:57, 45° above S horizon
21 Sep 2028EridanusVisible from 00:00 until 05:21
Highest at 03:52, 44° above S horizon

A more detailed table of 58P/Jackson-Neujmin's position on each night is available here. A diagram of the orbit of 58P/Jackson-Neujmin is available here.

Finder chart

The chart below shows the path of 58P/Jackson-Neujmin 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 58P/Jackson-Neujmin is currently available.

The comet's position at perihelion will be:

Object Right Ascension Declination Constellation Magnitude
Comet 58P/Jackson-Neujmin 02h30m30s 2°41'N Cetus 7.1

The coordinates are given in J2000.0.

The sky on 2 Sep 2028

The sky on 2 September 2028
Sunrise
06:08
Sunset
19:15
Twilight ends
20:55
Twilight begins
04:28

13-day old moon
Waxing Gibbous

99%

13 days old

Planets
Rise Culm. Set
Mercury 08:30 14:17 20:03
Venus 02:28 09:46 17:04
Moon 18:04 --:-- 04:47
Mars 02:30 09:58 17:25
Jupiter 07:57 14:02 20:06
Saturn 21:42 04:33 11:23
All times shown in EDT.

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 02 Jan 2024.

Image credit

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

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Cambridge

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42.38°N
71.11°W
EDT

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