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🌎  Greenwich, United Kingdom [change]

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 16h 42m 23s and the Declination is -45° 32’ 17” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2017 T2 (PANSTARRS) is 17.86 (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]:

16h 42m 23s
-45° 32’ 17”

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

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 October, 26 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2017 T2 (PANSTARRS) in Scorpius on October, 26 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: 16h 42m 23s
Dec: -45° 32’ 17”
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 1,004,050,117 kilometers, equivalent to 6.711660 Astronomical Units. Light takes 55 minutes and 49.1507 seconds to travel from Comet C/2017 T2 (PANSTARRS) and arrive to us.

55 minutes and 49.1507 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 227,404,529 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 17.86.


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 12 December 2019 00:00 UTC (JD: 2458830.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99967734
Orbit inclination i 57.23144112°
Perihelion distance q 1.61509538 AU
241,614,830 km
Aphelion distance Q 10,009.53256509 AU
1,497,404,761,443 km
Semi-major axis a 5,005.57383023 AU
748,823,188,136 km
Orbital period period 354,151.4400 years
129,353,812.6867 days
Date of perihelion transit Tp 2020-May-04 22:47:56
2,458,974.4500 JD
Next perihelion transit 2215-Nov-05 05:30
131,812,787.1366 JD
Argument of perihelion peri 92.993323538447°
Longitude of the ascending node node 64.378779715381°
Mean anomaly M 359.99959937797°
Mean motion n 0.00000278°/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 Oct 19 16h 36m 33s -45° 23’ 35” 17.80 Scorpius
2021 Oct 20 16h 37m 18s -45° 24’ 38” 17.80 Scorpius
2021 Oct 21 16h 38m 06s -45° 25’ 45” 17.81 Scorpius
2021 Oct 22 16h 38m 52s -45° 26’ 52” 17.82 Scorpius
2021 Oct 23 16h 39m 38s -45° 28’ 01” 17.83 Scorpius
2021 Oct 24 16h 40m 27s -45° 29’ 13” 17.84 Scorpius
2021 Oct 25 16h 41m 13s -45° 30’ 27” 17.85 Scorpius
2021 Oct 26 16h 42m 02s -45° 31’ 41” 17.86 Scorpius
2021 Oct 27 16h 42m 51s -45° 32’ 58” 17.87 Scorpius
2021 Oct 28 16h 43m 38s -45° 34’ 18” 17.88 Scorpius
2021 Oct 29 16h 44m 27s -45° 35’ 38” 17.88 Scorpius
2021 Oct 30 16h 45m 16s -45° 37’ 00” 17.89 Scorpius
2021 Oct 31 16h 46m 06s -45° 38’ 24” 17.90 Scorpius
2021 Nov 01 16h 46m 56s -45° 39’ 50” 17.91 Scorpius