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Comet C/2017 P2 (PANSTARRS)

Available Resources

Comet C/2017 P2 (PANSTARRS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 P2 (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 P2 (PANSTARRS) in Cetus on September, 26 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]
01h 02m 38s
-23° 23’ 41”

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 P2 (PANSTARRS) Rise and Set Times

Today's Comet C/2017 P2 (PANSTARRS) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 113.5°
Max altitude: 15.2°
Azimuth: 246.6°

Comet C/2017 P2 (PANSTARRS) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 P2 (PANSTARRS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 P2 (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 P2 (PANSTARRS)
View Comet C/2017 P2 (PANSTARRS) in the 3D Solar System Simulator

Comet C/2017 P2 (PANSTARRS) Ephemeris

The following table lists the ephemerides of Comet C/2017 P2 (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 P2 (PANSTARRS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Sep 19 01h 06m 38s -21° 53’ 48” 26.13 Cetus
2018 Sep 20 01h 06m 06s -22° 06’ 38” 26.15 Cetus
2018 Sep 21 01h 05m 35s -22° 19’ 18” 26.18 Cetus
2018 Sep 22 01h 05m 02s -22° 31’ 49” 26.21 Cetus
2018 Sep 23 01h 04m 29s -22° 44’ 08” 26.24 Cetus
2018 Sep 24 01h 03m 56s -22° 56’ 16” 26.26 Cetus
2018 Sep 25 01h 03m 23s -23° 08’ 12” 26.29 Cetus
2018 Sep 26 01h 02m 49s -23° 19’ 55” 26.32 Cetus
2018 Sep 27 01h 02m 16s -23° 31’ 27” 26.35 Cetus
2018 Sep 28 01h 01m 41s -23° 42’ 47” 26.38 Cetus
2018 Sep 29 01h 01m 06s -23° 53’ 54” 26.41 Cetus
2018 Sep 30 01h 00m 33s -24° 04’ 49” 26.43 Cetus
2018 Oct 01 00h 59m 57s -24° 15’ 29” 26.46 Cetus
2018 Oct 02 00h 59m 22s -24° 25’ 58” 26.49 Cetus

Distance of Comet C/2017 P2 (PANSTARRS) from Earth

The following chart shows the distance of Comet C/2017 P2 (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 P2 (PANSTARRS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2017 P2 (PANSTARRS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 P2 (PANSTARRS)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 P2 (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 P2 (PANSTARRS) between January 2013 and December 2075

Comet C/2017 P2 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 P2 (PANSTARRS) at epoch 01 September 2017 00:00 UTC (JD: 2457998.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99802844
Orbit inclination i 50.08493456°
Perihelion distance q 2.46180680 AU
368,281,057 km
Aphelion distance Q 2,494.85873811 AU
373,225,555,668 km
Semi-major axis a 1,248.66027246 AU
186,796,918,362 km
Orbital period period 44,123.9800 years
16,116,282.3869 days
Date of perihelion transit Tp 2017-Dec-06 13:26:51
2,458,094.0603 JD
Next perihelion transit 46142-Oct-24 22:43
18,574,376.4472 JD
Argument of perihelion peri 132.2377076654°
Longitude of the ascending node node 165.54593798376°
Mean anomaly M 359.99786540623°
Mean motion n 0.00002234°/day
Closest approach to Earth* 2017-Jul-19
Distance of closest approach* 2.59854899 AU
388,737,397 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.