Comet 38P/Stephan-Oterma will make its closest approach to the Sun, at a distance of 1.58 AU.
|11 Nov 2018||– 38P/Stephan-Oterma at perihelion|
|21 Oct 2018||Gemini||Visible from 01:02 until 06:23|
Highest at 06:00, 67° above S horizon
|23 Oct 2018||Gemini||Visible from 00:58 until 06:25|
Highest at 05:57, 67° above S horizon
|25 Oct 2018||Gemini||Visible from 00:53 until 06:27|
Highest at 05:54, 68° above S horizon
|27 Oct 2018||Gemini||Visible from 00:49 until 06:29|
Highest at 05:51, 68° above S horizon
|29 Oct 2018||Gemini||Visible from 00:44 until 06:31|
Highest at 05:48, 69° above S horizon
|31 Oct 2018||Gemini||Visible from 00:39 until 06:33|
Highest at 05:44, 69° above S horizon
|02 Nov 2018||Gemini||Visible from 00:34 until 06:35|
Highest at 05:41, 70° above S horizon
|04 Nov 2018||Gemini||Visible from 00:29 until 05:37|
Highest at 04:38, 71° above S horizon
|06 Nov 2018||Gemini||Visible from 23:20 until 05:39|
Highest at 04:34, 71° above S horizon
|08 Nov 2018||Gemini||Visible from 23:15 until 05:41|
Highest at 04:31, 72° above S horizon
|10 Nov 2018||Gemini||Visible from 23:10 until 05:43|
Highest at 04:27, 72° above S horizon
|12 Nov 2018||Gemini||Visible from 23:04 until 05:45|
Highest at 04:24, 73° above S horizon
|14 Nov 2018||Gemini||Visible from 22:58 until 05:47|
Highest at 04:20, 74° above S horizon
|16 Nov 2018||Gemini||Visible from 22:53 until 05:49|
Highest at 04:16, 74° above S horizon
|18 Nov 2018||Gemini||Visible from 22:47 until 05:51|
Highest at 04:12, 75° above S horizon
|20 Nov 2018||Gemini||Visible from 22:41 until 05:53|
Highest at 04:08, 76° above S horizon
|22 Nov 2018||Gemini||Visible from 22:34 until 05:55|
Highest at 04:04, 76° above S horizon
|24 Nov 2018||Cancer||Visible from 22:28 until 05:57|
Highest at 04:00, 77° above S horizon
|26 Nov 2018||Cancer||Visible from 22:21 until 05:58|
Highest at 03:56, 78° above S horizon
|28 Nov 2018||Cancer||Visible from 22:14 until 06:00|
Highest at 03:51, 79° above S horizon
|30 Nov 2018||Cancer||Visible from 22:07 until 06:02|
Highest at 03:46, 79° above S horizon
At the moment of perihelion it will be visible in the morning sky, becoming accessible around 23:06, when it reaches an altitude of 21° above your eastern horizon. It will then reach its highest point in the sky at 04:25, 72° above your southern horizon. It will be lost to dawn twilight around 05:42, 65° above your south-western horizon.
The chart below shows the path of 38P/Stephan-Oterma 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.
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 38P/Stephan-Oterma is currently available.
The comet's position at perihelion will be:
The coordinates are given in J2000.0.
|The sky on 11 November 2018|
4 days old
All times shown in EST.
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 03 Jan 2021.
© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.