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Comet C/2017 Y2 (PANSTARRS)

Available Resources

Comet C/2017 Y2 (PANSTARRS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 Y2 (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 Y2 (PANSTARRS) in Cassiopeia on June, 25 2018
High Precision Live Sky Chart
23h 43m 05s
+49° 34’ 00”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Comet C/2017 Y2 (PANSTARRS) Rise and Set Times

Comet C/2017 Y2 (PANSTARRS) is circumpolar from Greenwich, United Kingdom [change] and transits at 05:29 UTC (altitude: 88.1°)

Comet C/2017 Y2 (PANSTARRS) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 Y2 (PANSTARRS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 Y2 (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 Y2 (PANSTARRS)
View Comet C/2017 Y2 (PANSTARRS) in the 3D Solar System Simulator

Comet C/2017 Y2 (PANSTARRS) Ephemeris

The following table lists the ephemerides of Comet C/2017 Y2 (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 Y2 (PANSTARRS) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Jun 18 21.18 23h 45m 15s +48° 50’ 34” Cassiopeia
2018 Jun 19 21.17 23h 44m 58s +48° 56’ 48” Cassiopeia
2018 Jun 20 21.16 23h 44m 43s +49° 03’ 02” Cassiopeia
2018 Jun 21 21.16 23h 44m 25s +49° 09’ 15” Cassiopeia
2018 Jun 22 21.15 23h 44m 07s +49° 15’ 28” Cassiopeia
2018 Jun 23 21.14 23h 43m 48s +49° 21’ 39” Cassiopeia
2018 Jun 24 21.13 23h 43m 27s +49° 27’ 50” Cassiopeia
2018 Jun 25 21.12 23h 43m 05s +49° 34’ 00” Cassiopeia
2018 Jun 26 21.11 23h 42m 43s +49° 40’ 08” Cassiopeia
2018 Jun 27 21.10 23h 42m 21s +49° 46’ 14” Cassiopeia
2018 Jun 28 21.09 23h 41m 57s +49° 52’ 21” Cassiopeia
2018 Jun 29 21.09 23h 41m 32s +49° 58’ 24” Cassiopeia
2018 Jun 30 21.08 23h 41m 07s +50° 04’ 27” Cassiopeia
2018 Jul 01 21.07 23h 40m 41s +50° 10’ 27” Andromeda

Distance of Comet C/2017 Y2 (PANSTARRS) from Earth

The following chart shows the distance of Comet C/2017 Y2 (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 Y2 (PANSTARRS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2017 Y2 (PANSTARRS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 Y2 (PANSTARRS)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 Y2 (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 Y2 (PANSTARRS) between January 2013 and December 2075

Comet C/2017 Y2 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 Y2 (PANSTARRS) at epoch 29 December 2017 00:00 UTC (JD: 2458117.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99841903
Orbit inclination i 124.67079950°
Perihelion distance q 3.95699349 AU
591,957,802 km
Aphelion distance Q 5,001.81654839 AU
748,261,106,772 km
Semi-major axis a 2,502.88677094 AU
374,426,532,287 km
Orbital period period 125,218.9400 years
45,736,216.0903 days
Date of perihelion transit Tp 2020-Aug-19 04:02:01
2,459,080.6681 JD
Argument of perihelion peri 149.40252195488°
Longitude of the ascending node node 59.007221535776°
Mean anomaly M 359.99241868839°
Mean motion n 0.00000787°/day
Closest approach to Earth* 2020-Jun-24
Distance of closest approach* 3.18089655 AU
475,855,352 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.