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

217P/LINEAR reaches its brightest

Sun, 16 Jul 2017 (185 days ago)

Dominic Ford, Editor
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The sky at

Comet 217P/LINEAR is forecast to reach its brightest, at around mag 11.7. It will lie at a distance of 1.23 AU from the Sun, and at a distance of 1.42 AU from the Earth.

From Ashburn (click to change) however, it will not be observable – it will reach its highest point in the sky during daytime and will be no higher than 20° above the horizon at dawn.

For more information about its path across the sky, see In-The-Sky.org's ephemeris page for comet 217P/LINEAR.

This event was automatically generated on the basis of orbital elements published by the Minor Planet Center (MPC), and is updated daily (last update, 16 Jan 2018).

Note that the future positions of comets are typically known with a high degree of confidence, but their brightnesses are often much more unpredictable, since it is impossible to predict with certainty how they will respond as they move closer to the Sun. Magnitude estimates should be assumed to be highly provisional more than a few weeks in advance.

Printable finder charts
Light-on-dark PNG image PDF document
Dark-on-light PNG image PDF document
The path traced across the sky by 217P/LINEAR

The exact position of comet 217P/LINEAR will be:

Object Right Ascension Declination Constellation Magnitude
Comet 217P/LINEAR 03h45m10s +09°23' Taurus 11.7

The coordinates are given in J2000.0.

The sky on 16 July 2017
Sunrise 05:56
Sunset 20:33
Twilight ends
Twilight begins

22-day old moon
Age of Moon
22 days

All times shown in EDT.
Rise Culm. Set
Mercury 07:53 14:52 21:50
Venus 03:05 10:17 17:29
Moon 00:36 06:49 13:02
Mars 06:10 13:29 20:48
Jupiter 12:39 18:27 00:18
Saturn 18:08 22:55 03:46


The circumstances of this event were computed using the DE405 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).

This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.

Image credit

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




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