Your guide to the Solar System and the night sky
By donating now you help keep this site alive and free from ads. Please consider supporting this project, thank you!
🌎  Observing from: Greenwich, United Kingdom [change]

Comet C/2017 T2 (PANSTARRS)

Comet C/2017 T2 (PANSTARRS) is currently in the constellation of Telescopium. The current Right Ascension of Comet C/2017 T2 (PANSTARRS) is 18h 39m 18s and the Declination is -56° 48’ 02” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2017 T2 (PANSTARRS) is 19.69 (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]:

18h 39m 18s
-56° 48’ 02”

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 Telescopium on January, 29 2023
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2017 T2 (PANSTARRS) in Telescopium on January, 29 2023
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: 18h 39m 18s
Dec: -56° 48’ 02”
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 1,541,156,008 kilometers, equivalent to 10.301992 Astronomical Units. Light takes 1 hours, 25 minutes and 40.7431 seconds to travel from Comet C/2017 T2 (PANSTARRS) and arrive to us.

1 hours, 25 minutes and 40.7431 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 227,404,527 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 19.69.


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 0.99967729
Orbit inclination i 57.23143898°
Perihelion distance q 1.61509531 AU
241,614,821 km
Aphelion distance Q 10,008.01655618 AU
1,497,177,969,738 km
Semi-major axis a 5,004.81582575 AU
748,709,792,279 km
Orbital period period 354,070.9961 years
129,324,431.3226 days
Date of perihelion transit Tp 2020-May-04 22:47:57
2,458,974.4500 JD
Next perihelion transit 2135-May-26 20:45
131,783,405.7726 JD
Argument of perihelion peri 92.993327490769°
Longitude of the ascending node node 64.378779711485°
Mean anomaly M 359.99959928694°
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
2023 Jan 22 18h 34m 01s -56° 33’ 25” 19.68 Telescopium
2023 Jan 23 18h 34m 45s -56° 35’ 17” 19.68 Telescopium
2023 Jan 24 18h 35m 30s -56° 37’ 13” 19.68 Telescopium
2023 Jan 25 18h 36m 12s -56° 39’ 10” 19.69 Telescopium
2023 Jan 26 18h 36m 56s -56° 41’ 08” 19.69 Telescopium
2023 Jan 27 18h 37m 39s -56° 43’ 09” 19.69 Telescopium
2023 Jan 28 18h 38m 21s -56° 45’ 12” 19.69 Telescopium
2023 Jan 29 18h 39m 03s -56° 47’ 18” 19.69 Telescopium
2023 Jan 30 18h 39m 46s -56° 49’ 27” 19.69 Telescopium
2023 Jan 31 18h 40m 27s -56° 51’ 37” 19.69 Telescopium
2023 Feb 01 18h 41m 08s -56° 53’ 48” 19.70 Pavo
2023 Feb 02 18h 41m 49s -56° 56’ 03” 19.70 Pavo
2023 Feb 03 18h 42m 30s -56° 58’ 20” 19.70 Pavo
2023 Feb 04 18h 43m 10s -57° 00’ 39” 19.70 Pavo