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Comet C/2017 T2 (PANSTARRS)

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Comet C/2017 T2 (PANSTARRS) Position

Comet C/2017 T2 (PANSTARRS) is currently in the constellation of Perseus. The current Right Ascension is 02h 24m 58s and the Declination is +57° 33’ 25”.

02h 24m 58s
+57° 33’ 25”

Simplified sky chart showing where Comet C/2017 T2 (PANSTARRS) is right now in the sky with respect to the brightest stars and constellations (see full screen Online Planetarium)

Map showing Comet C/2017 T2 (PANSTARRS) in Perseus on January, 25 2020
Field of view: 60x30 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart showing where Comet C/2017 T2 (PANSTARRS) is right now (view fullscreen)

RA: 02h 24m 58s
Dec: +57° 33’ 25”
Deep sky finder chart for Comet C/2017 T2 (PANSTARRS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2017 T2 (PANSTARRS)?, a page that provides all the information needed to find Comet C/2017 T2 (PANSTARRS) in the sky and additional links to sky charts.

Comet C/2017 T2 (PANSTARRS) Distance

The distance of Comet C/2017 T2 (PANSTARRS) from Earth is currently 239,028,992 kilometers, equivalent to 1.597810 Astronomical Units. Light takes 13 minutes and 17.3149 seconds to travel from Comet C/2017 T2 (PANSTARRS) and arrive to us.

13 minutes and 17.3149 seconds

The following chart shows the distance of Comet C/2017 T2 (PANSTARRS) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Comet C/2017 T2 (PANSTARRS) from Earth between January 2013 and December 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2017 T2 (PANSTARRS) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2017 T2 (PANSTARRS) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2017 T2 (PANSTARRS) to Earth happens on Sun Dec 29 2019 at a distance of 1.52010719 Astronomical Units, or 227,404,799 kilometers:

Sun Dec 29 2019

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Comet C/2017 T2 (PANSTARRS) brightness

The current visual magnitude of Comet C/2017 T2 (PANSTARRS) is 11.96.


The observed magnitude and coma diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behavior of comets. When available, please refer to the Observed Magnitude value and consider the Estimated Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 T2 (PANSTARRS), according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Comet C/2017 T2 (PANSTARRS) between January 2013 and December 2100

Comet C/2017 T2 (PANSTARRS) rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Comet C/2017 T2 (PANSTARRS) is circumpolar and transits at 18:06 UTC (altitude: 83.9°)

The rise and set times are defined as the time at which the upper limb of Comet C/2017 T2 (PANSTARRS) touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2017 T2 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 T2 (PANSTARRS) at epoch 30 May 2019 00:00 UTC (JD: 2458634.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99976226
Orbit inclination i 57.23484083°
Perihelion distance q 1.61490133 AU
241,585,801 km
Aphelion distance Q 13,583.57338214 AU
2,032,073,658,540 km
Semi-major axis a 6,792.59414173 AU
1,016,157,622,170 km
Orbital period period 559,837.1300 years
204,480,513.0782 days
Date of perihelion transit Tp 2020-May-04 22:28:39
2,458,974.4366 JD
Argument of perihelion peri 92.997387609635°
Longitude of the ascending node node 64.378918390104°
Mean anomaly M 359.99940152163°
Mean motion n 0.00000176°/day

Visualization of Comet C/2017 T2 (PANSTARRS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 T2 (PANSTARRS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 T2 (PANSTARRS) and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Comet C/2017 T2 (PANSTARRS)
View Comet C/2017 T2 (PANSTARRS) in the 3D Solar System Simulator

Comet C/2017 T2 (PANSTARRS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2017 T2 (PANSTARRS) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2017 T2 (PANSTARRS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Jan 18 02h 39m 33s +57° 02’ 49” 11.97 Perseus
2020 Jan 19 02h 37m 24s +57° 07’ 05” 11.97 Perseus
2020 Jan 20 02h 35m 21s +57° 11’ 12” 11.97 Perseus
2020 Jan 21 02h 33m 20s +57° 15’ 14” 11.96 Perseus
2020 Jan 22 02h 31m 26s +57° 19’ 10” 11.96 Perseus
2020 Jan 23 02h 29m 35s +57° 23’ 04” 11.96 Perseus
2020 Jan 24 02h 27m 47s +57° 26’ 56” 11.96 Perseus
2020 Jan 25 02h 26m 06s +57° 30’ 47” 11.96 Perseus
2020 Jan 26 02h 24m 28s +57° 34’ 37” 11.96 Perseus
2020 Jan 27 02h 22m 54s +57° 38’ 29” 11.95 Perseus
2020 Jan 28 02h 21m 25s +57° 42’ 23” 11.95 Perseus
2020 Jan 29 02h 20m 00s +57° 46’ 19” 11.95 Perseus
2020 Jan 30 02h 18m 39s +57° 50’ 21” 11.95 Perseus
2020 Jan 31 02h 17m 24s +57° 54’ 26” 11.95 Perseus