11,057 days ago
Dominic Ford, Editor
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Comet 58P/Jackson-Neujmin is forecast to reach the brightest point in its 1995 apparition on 17 September. At that time, it will lie at a distance of 1.37 AU from the Sun, and at a distance of 0.38 AU from the Earth.
From South El Monte on 17 September it will be visible between 22:22 and 05:29. It will become accessible at around 22:22, when it rises to an altitude of 21° above your south-eastern horizon. It will reach its highest point in the sky at 01:55, 44° above your southern horizon. It will become inaccessible at around 05:29 when it sinks below 21° above your south-western horizon.
The events that comprise the 1995 apparition of 58P/Jackson-Neujmin are as follows:
| Date | Event |
| 17 Sep 1995 | Comet 58P/Jackson-Neujmin reaches peak brightness |
| 17 Sep 1995 | Comet 58P/Jackson-Neujmin passes perigee |
| 19 Sep 1995 | Comet 58P/Jackson-Neujmin passes perihelion |
The table below lists the times when 58P/Jackson-Neujmin will be visible from South El Monte day-by-day through its apparition:
| Date | Constellation | Comet visibility |
| 27 Aug 1995 | Pisces | Visible from 22:11 until 05:19 Highest at 02:34, 55° above S horizon |
| 29 Aug 1995 | Pisces | Visible from 22:10 until 05:21 Highest at 02:30, 54° above S horizon |
| 31 Aug 1995 | Pisces | Visible from 22:08 until 05:22 Highest at 02:27, 53° above S horizon |
| 02 Sep 1995 | Pisces | Visible from 22:07 until 05:24 Highest at 02:23, 52° above S horizon |
| 04 Sep 1995 | Pisces | Visible from 22:06 until 05:26 Highest at 02:20, 51° above S horizon |
| 06 Sep 1995 | Pisces | Visible from 22:05 until 05:27 Highest at 02:16, 50° above S horizon |
| 08 Sep 1995 | Cetus | Visible from 22:05 until 05:29 Highest at 02:12, 49° above S horizon |
| 10 Sep 1995 | Cetus | Visible from 22:04 until 05:30 Highest at 02:09, 48° above S horizon |
| 12 Sep 1995 | Cetus | Visible from 22:03 until 05:32 Highest at 02:05, 47° above S horizon |
| 14 Sep 1995 | Cetus | Visible from 22:03 until 05:34 Highest at 02:01, 46° above S horizon |
| 16 Sep 1995 | Cetus | Visible from 22:02 until 05:35 Highest at 01:57, 45° above S horizon |
| 18 Sep 1995 | Cetus | Visible from 22:02 until 05:37 Highest at 01:53, 44° above S horizon |
| 20 Sep 1995 | Cetus | Visible from 22:01 until 05:37 Highest at 01:49, 43° above S horizon |
| 22 Sep 1995 | Cetus | Visible from 22:01 until 05:29 Highest at 01:45, 42° above S horizon |
| 24 Sep 1995 | Cetus | Visible from 22:00 until 05:21 Highest at 01:40, 41° above S horizon |
| 26 Sep 1995 | Cetus | Visible from 21:59 until 05:13 Highest at 01:36, 41° above S horizon |
| 28 Sep 1995 | Cetus | Visible from 21:58 until 05:05 Highest at 01:31, 40° above S horizon |
| 30 Sep 1995 | Cetus | Visible from 21:57 until 04:56 Highest at 01:27, 39° above S horizon |
| 02 Oct 1995 | Cetus | Visible from 21:56 until 04:48 Highest at 01:22, 38° above S horizon |
| 04 Oct 1995 | Cetus | Visible from 21:54 until 04:40 Highest at 01:17, 38° above S horizon |
| 06 Oct 1995 | Cetus | Visible from 21:52 until 04:31 Highest at 01:12, 37° 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 on 17 September 1995 will be:
| Object | Right Ascension | Declination | Constellation | Magnitude |
| Comet 58P/Jackson-Neujmin | 00h46m50s | 11°18'S | Cetus | 6.3 |
The coordinates are given in J2000.0.
The sky on 25 Dec 2025
| The sky on 25 December 2025 | ||||||||||||||||||||||||||||||||||
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37% 6 days old |
All times shown in PST.
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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 15 Dec 2025.
Image credit
© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.