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🌎 Location: Greenwich, United Kingdom [change]

Comet C/2017 T2 (PANSTARRS)

Comet C/2017 T2 (PANSTARRS) is currently in the constellation of Coma. The current Right Ascension of Comet C/2017 T2 (PANSTARRS) is 13h 35m 13s and the Declination is +16° 20’ 44” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2017 T2 (PANSTARRS) is 13.00 (JPL) while the latest observed magnitude is 10.2 (COBS).

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]:

13h 35m 13s
+16° 20’ 44”
  • C/2017 T2 (PANSTARRS) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the East-North-East direction at an altitude of 2° above the horizon.
  • Given its current magnitude, C/2017 T2 (PANSTARRS) is visible with the help of a binocular with a 80mm aperture or a small telescope.
  • See also C/2017 T2 (PANSTARRS) rise and set times.
  • Go to interactive sky chart

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 Coma on August, 06 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2017 T2 (PANSTARRS) in Coma on August, 06 2020
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: 13h 35m 13s
Dec: +16° 20’ 44”
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 338,133,539 kilometers, equivalent to 2.260283 Astronomical Units. Light takes 18 minutes and 47.8921 seconds to travel from Comet C/2017 T2 (PANSTARRS) and arrive to us.

18 minutes and 47.8921 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 1.52010775 Astronomical Units, or 227,404,883 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 13.00.


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

Today's Comet C/2017 T2 (PANSTARRS) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 73.6°
Max altitude: 54.7°
Azimuth: 286.6°

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 05 November 2019 00:00 UTC (JD: 2458793.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99970568
Orbit inclination i 57.23203847°
Perihelion distance q 1.61507953 AU
241,612,460 km
Aphelion distance Q 10,973.19849462 AU
1,641,567,132,856 km
Semi-major axis a 5,487.40678708 AU
820,904,372,658 km
Orbital period period 406,498.4900 years
148,473,573.3728 days
Date of perihelion transit Tp 2020-May-04 22:45:33
2,458,974.4483 JD
Next perihelion transit 408527-Mar-07 07:42
150,932,547.8211 JD
Argument of perihelion peri 92.993414781907°
Longitude of the ascending node node 64.379003513408°
Mean anomaly M 359.99956125938°
Mean motion n 0.00000242°/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 Jul 30 13h 23m 43s +20° 48’ 55” 13.00 Coma
2020 Jul 31 13h 25m 18s +20° 11’ 21” 13.00 Coma
2020 Aug 01 13h 26m 53s +19° 34’ 10” 13.00 Coma
2020 Aug 02 13h 28m 27s +18° 57’ 24” 13.00 Coma
2020 Aug 03 13h 30m 00s +18° 21’ 03” 13.00 Coma
2020 Aug 04 13h 31m 32s +17° 45’ 06” 13.00 Coma
2020 Aug 05 13h 33m 06s +17° 09’ 32” 13.00 Coma
2020 Aug 06 13h 34m 37s +16° 34’ 22” 13.00 Coma
2020 Aug 07 13h 36m 10s +15° 59’ 35” 13.00 Bootes
2020 Aug 08 13h 37m 41s +15° 25’ 13” 13.00 Bootes
2020 Aug 09 13h 39m 11s +14° 51’ 14” 13.00 Bootes
2020 Aug 10 13h 40m 41s +14° 17’ 36” 13.00 Bootes
2020 Aug 11 13h 42m 11s +13° 44’ 24” 13.00 Bootes
2020 Aug 12 13h 43m 41s +13° 11’ 34” 13.00 Bootes