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Comet C/2017 Y2 (PANSTARRS)

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Comet C/2017 Y2 (PANSTARRS) Position

Comet C/2017 Y2 (PANSTARRS) is currently in the constellation of Cygnus. The current Right Ascension is 20h 22m 31s and the Declination is +43° 31’ 03”.

20h 22m 31s
+43° 31’ 03”

Simplified sky chart showing where Comet C/2017 Y2 (PANSTARRS) is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Comet C/2017 Y2 (PANSTARRS) in Cygnus on August, 22 2019
Field of view: 60x30 degrees
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 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Hihgher precision deep sky finder chart showing where Comet C/2017 Y2 (PANSTARRS) is right now (view fullscreen)

RA: 20h 22m 31s
Dec: +43° 31’ 03”
Deep sky finder chart for Comet C/2017 Y2 (PANSTARRS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2017 Y2 (PANSTARRS)?, a page that provides all the information needed to find Comet C/2017 Y2 (PANSTARRS) in the sky and additional links to sky charts.

Comet C/2017 Y2 (PANSTARRS) Distance

The distance of Comet C/2017 Y2 (PANSTARRS) from Earth is currently 778,330,024 kilometers, equivalent to 5.202815 Astronomical Units. Light takes 43 minutes and 16.2295 seconds to travel from Comet C/2017 Y2 (PANSTARRS) and arrive to us.

43 minutes and 16.2295 seconds

The following chart shows the distance of Comet C/2017 Y2 (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 Y2 (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 Y2 (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 Y2 (PANSTARRS) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2017 Y2 (PANSTARRS) to Earth happens on Tue May 25 2021 at a distance of 3.89818162 Astronomical Units, or 583,159,671 kilometers:

Tue May 25 2021

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

Comet C/2017 Y2 (PANSTARRS) brightness

The current visual magnitude of Comet C/2017 Y2 (PANSTARRS) is 18.52.


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.

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 2100

Comet C/2017 Y2 (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 Y2 (PANSTARRS) is circumpolar and transits at 22:18 UTC (altitude: 82.0°)

The rise and set times are defined as the time at which the upper limb of Comet C/2017 Y2 (PANSTARRS) touches the horizon, consideting the effect of the atmospheric refraction. As the atmoshpere conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2017 Y2 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 Y2 (PANSTARRS) at epoch 02 May 2019 00:00 UTC (JD: 2458606.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00124925
Orbit inclination i 128.43015242°
Perihelion distance q 4.63401515 AU
693,238,801 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2020-Nov-04 03:32:47
2,459,157.6478 JD
Argument of perihelion peri 147.78787839947°
Longitude of the ascending node node 65.969635267252°
Mean anomaly M -0.0024044261722696°
Mean motion n 0.00000436°/day

Visualization of Comet C/2017 Y2 (PANSTARRS) Orbit

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) 15 Days 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 Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Aug 15 20h 32m 33s +44° 24’ 38” 18.56 Cygnus
2019 Aug 16 20h 31m 06s +44° 17’ 47” 18.56 Cygnus
2019 Aug 17 20h 29m 40s +44° 10’ 41” 18.55 Cygnus
2019 Aug 18 20h 28m 14s +44° 03’ 21” 18.54 Cygnus
2019 Aug 19 20h 26m 49s +43° 55’ 47” 18.54 Cygnus
2019 Aug 20 20h 25m 24s +43° 48’ 01” 18.53 Cygnus
2019 Aug 21 20h 24m 02s +43° 39’ 59” 18.53 Cygnus
2019 Aug 22 20h 22m 37s +43° 31’ 45” 18.52 Cygnus
2019 Aug 23 20h 21m 15s +43° 23’ 17” 18.51 Cygnus
2019 Aug 24 20h 19m 54s +43° 14’ 35” 18.51 Cygnus
2019 Aug 25 20h 18m 33s +43° 05’ 41” 18.50 Cygnus
2019 Aug 26 20h 17m 12s +42° 56’ 35” 18.50 Cygnus
2019 Aug 27 20h 15m 52s +42° 47’ 16” 18.49 Cygnus
2019 Aug 28 20h 14m 34s +42° 37’ 45” 18.49 Cygnus