Dominic Ford, Editor
From the Comets feed
Comet C/2017 O1 (ASASSN) will make its closest approach to the Sun, at a distance of 1.49 AU.
From Cambridge, it will be visible in the morning sky, becoming accessible around 20:39, when it rises 21° above your north-eastern horizon. It will then reach its highest point in the sky at 03:56, 81° above your northern horizon. It will be lost to dawn twilight around 05:48, 69° above your north-western horizon.
Based on the absolute magnitude published for this comet by the British Astronomical Association's Comet Section, we estimate that it may be around mag 9 at perihelion.
This comet is not expected to be visible to the naked eye, but might be visible through bird-watching binoculars. The brightnesses of comets are often highly unpredictable, since it is impossible to predict with certainty how they will respond as they are heated by the Sun as they move into the inner solar system. Magnitude estimates should be assumed to be highly provisional more than a few weeks in advance.
The path of the comet, on the other hand, can reliably be predicted. The chart below shows the path of C/2017 O1 (ASASSN) over the course of its apparition. It was produced using StarCharter and 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.Alternatively, you can create a textual listing of the comet's position using In-The-Sky.org's ephemeris generator.
The position of comet C/2017 O1 (ASASSN) at perihelion will be:
|Comet C/2017 O1 (ASASSN)||04h44m20s||+50°45'||Perseus||8.9|
The coordinates are given in J2000.0.
|The sky on 14 October 2017|
24 days old
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 20 Aug 2019.
© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.