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🌎 Location: Greenwich, United Kingdom [change]

Comet C/2017 K2 (PANSTARRS)

Comet C/2017 K2 (PANSTARRS) is currently in the constellation of Hercules. The current Right Ascension of Comet C/2017 K2 (PANSTARRS) is 17h 08m 04s and the Declination is +48° 50’ 38” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2017 K2 (PANSTARRS) is 16.26 (JPL) while the latest observed magnitude is 15.7 (COBS).

Summary of key facts about Comet C/2017 K2 (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 08m 04s
+48° 50’ 38”
Hercules
15.7
16.26
  • C/2017 K2 (PANSTARRS) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the North-North-East direction at an altitude of 13° above the horizon.
  • Given its current magnitude, C/2017 K2 (PANSTARRS) is visible only through long exposure photography.
  • See also C/2017 K2 (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 K2 (PANSTARRS) available on TheSkyLive:

Available Resources

Comet C/2017 K2 (PANSTARRS) Position and Finder Charts

Below we provide Comet C/2017 K2 (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 K2 (PANSTARRS) in Hercules on August, 15 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2017 K2 (PANSTARRS) in Hercules on August, 15 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 K2 (PANSTARRS) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2017 K2 (PANSTARRS)
RA: 17h 08m 04s
Dec: +48° 50’ 38”
Deep sky finder chart for Comet C/2017 K2 (PANSTARRS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2017 K2 (PANSTARRS)?, a page that provides all the information needed to find Comet C/2017 K2 (PANSTARRS) in the sky and additional links to sky charts.

Comet C/2017 K2 (PANSTARRS) Distance from Earth

The distance of Comet C/2017 K2 (PANSTARRS) from Earth is currently 1,252,439,743 kilometers, equivalent to 8.372043 Astronomical Units. Light takes 1 hours, 9 minutes and 37.6893 seconds to travel from Comet C/2017 K2 (PANSTARRS) and arrive to us.

1,252,439,743
8.372043
1 hours, 9 minutes and 37.6893 seconds

The following chart shows the distance of Comet C/2017 K2 (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 K2 (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 K2 (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 K2 (PANSTARRS) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2017 K2 (PANSTARRS) to Earth happens on Thu Jul 14 2022 at a distance of 1.80785028 Astronomical Units, or 270,450,553 kilometers:

Thu Jul 14 2022
270,450,553
1.807850

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

Comet C/2017 K2 (PANSTARRS) brightness

The current visual magnitude of Comet C/2017 K2 (PANSTARRS) is 16.26.

16.26
15.7
0.8'

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 K2 (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 K2 (PANSTARRS) between January 2013 and December 2100

Comet C/2017 K2 (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 K2 (PANSTARRS) is circumpolar and transits at 19:29 UTC (altitude: 87.4°)

The rise and set times are defined as the time at which the upper limb of Comet C/2017 K2 (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 K2 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 K2 (PANSTARRS) at epoch 21 February 2019 00:00 UTC (JD: 2458536.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00036795
Orbit inclination i 87.54234974°
Perihelion distance q 1.80457620 AU
269,960,757 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2022-Dec-20 12:51:40
2,459,934.0359 JD
Argument of perihelion peri 236.09140339889°
Longitude of the ascending node node 88.265957959968°
Mean anomaly M -0.0040103539232489°
Mean motion n 0.00000287°/day

Visualization of Comet C/2017 K2 (PANSTARRS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 K2 (PANSTARRS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 K2 (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 K2 (PANSTARRS)
View Comet C/2017 K2 (PANSTARRS) in the 3D Solar System Simulator

Comet C/2017 K2 (PANSTARRS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2017 K2 (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 K2 (PANSTARRS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Aug 08 17h 10m 37s +49° 43’ 05” 16.28 Hercules
2020 Aug 09 17h 10m 14s +49° 36’ 11” 16.27 Hercules
2020 Aug 10 17h 09m 52s +49° 29’ 14” 16.27 Hercules
2020 Aug 11 17h 09m 30s +49° 22’ 13” 16.27 Hercules
2020 Aug 12 17h 09m 10s +49° 15’ 07” 16.27 Hercules
2020 Aug 13 17h 08m 49s +49° 07’ 58” 16.26 Hercules
2020 Aug 14 17h 08m 30s +49° 00’ 45” 16.26 Hercules
2020 Aug 15 17h 08m 11s +48° 53’ 27” 16.26 Hercules
2020 Aug 16 17h 07m 53s +48° 46’ 06” 16.25 Hercules
2020 Aug 17 17h 07m 36s +48° 38’ 43” 16.25 Hercules
2020 Aug 18 17h 07m 18s +48° 31’ 15” 16.25 Hercules
2020 Aug 19 17h 07m 02s +48° 23’ 44” 16.25 Hercules
2020 Aug 20 17h 06m 47s +48° 16’ 12” 16.24 Hercules
2020 Aug 21 17h 06m 33s +48° 08’ 35” 16.24 Hercules