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

C/2017 T1 (Heinze) reaches its brightest

Dominic Ford, Editor
From the Comets feed

Comet C/2017 T1 (Heinze) is forecast to reach its brightest, at around mag 9.4. It will lie at a distance of 1.13 AU from the Sun, and at a distance of 0.22 AU from the Earth.

From Ashburn, it will be visible all night because it is circumpolar. It will be highest in the sky at 21:08, 59° above your northern horizon. At dusk, it will become visible at around 18:10 (EDT), 51° above your north-eastern horizon. It will be lost to dawn twilight at around 06:21, 22° above your northern horizon.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.

For more information about its path across the sky, see In-The-Sky.org's ephemeris page for comet C/2017 T1 (Heinze).

This event was automatically generated on the basis of orbital elements published by the Minor Planet Center (MPC), and is updated daily (last update, 24 Mar 2019).

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 exact position of comet C/2017 T1 (Heinze) will be:

Object Right Ascension Declination Constellation Magnitude
Comet C/2017 T1 (Heinze) 04h00m50s +69°24' Camelopardalis 9.4

The coordinates are given in J2000.0.

The sky on 05 January 2018
Twilight ends
Twilight begins

18-day old moon
Waning Gibbous


18 days old

Rise Culm. Set
Mercury 05:50 10:37 15:25
Venus 07:29 12:10 16:52
Moon 21:41 03:19 10:06
Mars 02:58 08:07 13:17
Jupiter 03:01 08:10 13:20
Saturn 06:31 11:16 16:01
All times shown in EST.


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.




Color scheme