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Comet C/2017 T2 (PANSTARRS)

Comet C/2017 T2 (PANSTARRS) is currently in the constellation of Scorpius. The current Right Ascension of Comet C/2017 T2 (PANSTARRS) is 17h 15m 27s and the Declination is -44° 50’ 57” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2017 T2 (PANSTARRS) is 16.10 (JPL).

Summary of key facts about Comet C/2017 T2 (PANSTARRS) [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

17h 15m 27s
-44° 50’ 57”

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Additional information about Comet C/2017 T2 (PANSTARRS) available on TheSkyLive:

Available Resources

Comet C/2017 T2 (PANSTARRS) Position and Finder Charts

Below we provide Comet C/2017 T2 (PANSTARRS) finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Comet C/2017 T2 (PANSTARRS) in Scorpius on May, 17 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2017 T2 (PANSTARRS) in Scorpius on May, 17 2021
Field of view: 10x6 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, 60 arcmin wide, showing where Comet C/2017 T2 (PANSTARRS) is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 17h 15m 27s
Dec: -44° 50’ 57”
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 from Earth

The distance of Comet C/2017 T2 (PANSTARRS) from Earth is currently 565,198,155 kilometers, equivalent to 3.778116 Astronomical Units. Light takes 31 minutes and 25.2981 seconds to travel from Comet C/2017 T2 (PANSTARRS) and arrive to us.

31 minutes and 25.2981 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 1.520105 Astronomical Units, or 227,404,487 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 16.10.


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 currently not visible from Greenwich, United Kingdom [change]

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 08 December 2019 00:00 UTC (JD: 2458826.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99967927
Orbit inclination i 57.23152930°
Perihelion distance q 1.61509312 AU
241,614,493 km
Aphelion distance Q 10,069.67877279 AU
1,506,402,506,063 km
Semi-major axis a 5,035.64693296 AU
753,322,060,278 km
Orbital period period 357,347.8000 years
130,521,283.4710 days
Date of perihelion transit Tp 2020-May-04 22:47:44
2,458,974.4498 JD
Next perihelion transit 2243-May-25 14:32
132,980,257.9208 JD
Argument of perihelion peri 92.993356700844°
Longitude of the ascending node node 64.378808643354°
Mean anomaly M 359.99959192912°
Mean motion n 0.00000276°/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
2021 May 10 17h 23m 35s -44° 02’ 12” 16.06 Scorpius
2021 May 11 17h 22m 36s -44° 08’ 56” 16.06 Scorpius
2021 May 12 17h 21m 34s -44° 15’ 32” 16.07 Scorpius
2021 May 13 17h 20m 33s -44° 22’ 00” 16.07 Scorpius
2021 May 14 17h 19m 29s -44° 28’ 19” 16.08 Scorpius
2021 May 15 17h 18m 27s -44° 34’ 32” 16.08 Scorpius
2021 May 16 17h 17m 21s -44° 40’ 36” 16.09 Scorpius
2021 May 17 17h 16m 17s -44° 46’ 31” 16.09 Scorpius
2021 May 18 17h 15m 11s -44° 52’ 18” 16.10 Scorpius
2021 May 19 17h 14m 04s -44° 57’ 56” 16.10 Scorpius
2021 May 20 17h 12m 57s -45° 03’ 24” 16.11 Scorpius
2021 May 21 17h 11m 49s -45° 08’ 44” 16.11 Scorpius
2021 May 22 17h 10m 41s -45° 13’ 55” 16.12 Scorpius
2021 May 23 17h 09m 33s -45° 18’ 56” 16.13 Scorpius