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Comet C/2017 K2 (PANSTARRS)

Available Resources

Comet C/2017 K2 (PANSTARRS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 K2 (PANSTARRS) is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Comet C/2017 K2 (PANSTARRS) in Draco on October, 16 2018
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
17h 13m 29s
+54° 35’ 38”

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 behvior 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.

Comet C/2017 K2 (PANSTARRS) Rise and Set Times

Comet C/2017 K2 (PANSTARRS) is circumpolar from Greenwich, United Kingdom [change] and transits at 15:33 UTC (altitude: 86.9°)

Comet C/2017 K2 (PANSTARRS) Orbit Diagram

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) 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
2018 Oct 09 17h 11m 34s +55° 08’ 31” 18.50 Draco
2018 Oct 10 17h 11m 48s +55° 03’ 55” 18.50 Draco
2018 Oct 11 17h 12m 02s +54° 59’ 20” 18.50 Draco
2018 Oct 12 17h 12m 19s +54° 54’ 47” 18.50 Draco
2018 Oct 13 17h 12m 34s +54° 50’ 16” 18.49 Draco
2018 Oct 14 17h 12m 51s +54° 45’ 46” 18.49 Draco
2018 Oct 15 17h 13m 08s +54° 41’ 18” 18.49 Draco
2018 Oct 16 17h 13m 24s +54° 36’ 54” 18.49 Draco
2018 Oct 17 17h 13m 41s +54° 32’ 30” 18.49 Draco
2018 Oct 18 17h 13m 59s +54° 28’ 09” 18.48 Draco
2018 Oct 19 17h 14m 17s +54° 23’ 51” 18.48 Draco
2018 Oct 20 17h 14m 36s +54° 19’ 35” 18.48 Draco
2018 Oct 21 17h 14m 56s +54° 15’ 20” 18.48 Draco
2018 Oct 22 17h 15m 15s +54° 11’ 08” 18.48 Draco

Distance of Comet C/2017 K2 (PANSTARRS) from Earth

The following chart shows the distance of Comet C/2017 K2 (PANSTARRS) from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2017 K2 (PANSTARRS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2017 K2 (PANSTARRS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 K2 (PANSTARRS)

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 2075

Comet C/2017 K2 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 K2 (PANSTARRS) at epoch 21 September 2017 00:00 UTC (JD: 2458018.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00035961
Orbit inclination i 87.55224288°
Perihelion distance q 1.81031876 AU
270,819,833 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2022-Dec-21 05:42:15
2,459,934.7377 JD
Argument of perihelion peri 236.0240425723°
Longitude of the ascending node node 88.195817684143°
Mean anomaly M -0.005287611663475°
Mean motion n 0.00000276°/day
Closest approach to Earth* 2022-Jul-14
Distance of closest approach* 1.80756335 AU
270,407,629 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.