1,785 days ago
Dominic Ford, Editor
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Comet C/2017 T2 (PANSTARRS) is forecast to reach the brightest point in its 2020 apparition on 14 May. At that time, it will lie at a distance of 1.62 AU from the Sun, and at a distance of 1.67 AU from the Earth.
From Jacksonville on 14 May it will be visible all night because it is circumpolar. It will be highest in the sky at dusk, becoming accessible at around 21:16 (EDT), 41° above your northern horizon. It will be lost to dawn twilight at around 05:27, 15° above your northern horizon.
The events that comprise the 2020 apparition of C/2017 T2 (PANSTARRS) are as follows:
| Date | Event |
| 04 May 2020 | Comet C/2017 T2 (PANSTARRS) passes perihelion |
| 14 May 2020 | Comet C/2017 T2 (PANSTARRS) reaches peak brightness |
The table below lists the times when C/2017 T2 (PANSTARRS) will be visible from Jacksonville day-by-day through its apparition:
| Date | Constellation | Comet visibility |
| 23 Apr 2020 | Camelopardalis | Visible from 20:59 until 05:48 Highest at 20:59, 34° above N horizon |
| 25 Apr 2020 | Camelopardalis | Visible from 21:01 until 05:46 Highest at 21:01, 35° above N horizon |
| 27 Apr 2020 | Camelopardalis | Visible from 21:02 until 05:44 Highest at 21:02, 35° above N horizon |
| 29 Apr 2020 | Camelopardalis | Visible from 21:04 until 05:41 Highest at 21:04, 36° above N horizon |
| 01 May 2020 | Camelopardalis | Visible from 21:05 until 05:39 Highest at 21:05, 37° above N horizon |
| 03 May 2020 | Camelopardalis | Visible from 21:07 until 05:37 Highest at 21:07, 37° above N horizon |
| 05 May 2020 | Camelopardalis | Visible from 21:09 until 05:35 Highest at 21:09, 38° above N horizon |
| 07 May 2020 | Camelopardalis | Visible from 21:10 until 05:33 Highest at 21:10, 39° above N horizon |
| 09 May 2020 | Camelopardalis | Visible from 21:12 until 05:31 Highest at 21:12, 40° above N horizon |
| 11 May 2020 | Camelopardalis | Visible from 21:14 until 05:30 Highest at 21:14, 41° above N horizon |
| 13 May 2020 | Camelopardalis | Visible from 21:15 until 05:28 Highest at 21:15, 42° above N horizon |
| 15 May 2020 | Camelopardalis | Visible from 21:17 until 05:26 Highest at 21:17, 43° above N horizon |
| 17 May 2020 | Camelopardalis | Visible from 21:19 until 05:25 Highest at 21:19, 44° above N horizon |
| 19 May 2020 | Ursa Major | Visible from 21:20 until 05:23 Highest at 21:20, 45° above N horizon |
| 21 May 2020 | Ursa Major | Visible from 21:22 until 05:22 Highest at 21:22, 46° above N horizon |
| 23 May 2020 | Ursa Major | Visible from 21:23 until 02:43 Highest at 21:23, 47° above N horizon |
| 25 May 2020 | Ursa Major | Visible from 21:25 until 02:41 Highest at 21:25, 48° above N horizon |
| 27 May 2020 | Ursa Major | Visible from 21:26 until 02:39 Highest at 21:26, 49° above N horizon |
| 29 May 2020 | Ursa Major | Visible from 21:28 until 02:36 Highest at 21:28, 50° above N horizon |
| 31 May 2020 | Ursa Major | Visible from 21:29 until 02:32 Highest at 21:29, 51° above N horizon |
| 02 Jun 2020 | Ursa Major | Visible from 21:30 until 02:28 Highest at 21:30, 53° above N horizon |
A more detailed table of C/2017 T2 (PANSTARRS)'s position on each night is available here. A diagram of the orbit of C/2017 T2 (PANSTARRS) is available here.
Finder chart
The chart below shows the path of C/2017 T2 (PANSTARRS) 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 C/2017 T2 (PANSTARRS) is currently available.
The comet's position on 14 May 2020 will be:
| Object | Right Ascension | Declination | Constellation | Magnitude |
| Comet C/2017 T2 (PANSTARRS) | 08h44m10s | 74°24'N | Camelopardalis | 8.8 |
The coordinates are given in J2000.0.
The sky on 14 May 2020
| The sky on 14 May 2020 | ||||||||||||||||||||||||||||||||||
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44% 21 days old |
All times shown in EDT.
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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 23 Feb 2025.
Image credit
© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.