Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]
Comets » 

Comet C/2017 Y2 (PANSTARRS)

Available Resources

Comet C/2017 Y2 (PANSTARRS) Position

Comet C/2017 Y2 (PANSTARRS) is currently in the constellation of Sagitta. The current Right Ascension is 20h 02m 15s and the Declination is +21° 32’ 57”.

20h 02m 15s
+21° 32’ 57”

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 full screen Online Planetarium)

Map showing Comet C/2017 Y2 (PANSTARRS) in Sagitta on April, 04 2020
Field of view: 60x30 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 showing where Comet C/2017 Y2 (PANSTARRS) is right now (view fullscreen)

RA: 20h 02m 15s
Dec: +21° 32’ 57”
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 770,658,863 kilometers, equivalent to 5.151536 Astronomical Units. Light takes 42 minutes and 50.6413 seconds to travel from Comet C/2017 Y2 (PANSTARRS) and arrive to us.

42 minutes and 50.6413 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 3.89693950 Astronomical Units, or 582,973,853 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 17.89.


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 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

Today's Comet C/2017 Y2 (PANSTARRS) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 68.4°
Max altitude: 60.1°
Azimuth: 291.6°
Comet C/2017 Y2 (PANSTARRS) is above the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Comet C/2017 Y2 (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 Y2 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 Y2 (PANSTARRS) at epoch 15 June 2019 00:00 UTC (JD: 2458650.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00008234
Orbit inclination i 128.43067607°
Perihelion distance q 4.63324647 AU
693,123,807 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 08:53:38
2,459,157.8706 JD
Argument of perihelion peri 147.81216471873°
Longitude of the ascending node node 65.97201368264°
Mean anomaly M -3.7463684640816E-5°
Mean motion n 0.00000007°/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
2020 Mar 28 20h 03m 06s +21° 07’ 42” 17.95 Sagitta
2020 Mar 29 20h 03m 01s +21° 11’ 05” 17.94 Sagitta
2020 Mar 30 20h 02m 56s +21° 14’ 30” 17.94 Sagitta
2020 Mar 31 20h 02m 49s +21° 17’ 57” 17.93 Sagitta
2020 Apr 01 20h 02m 43s +21° 21’ 25” 17.92 Sagitta
2020 Apr 02 20h 02m 35s +21° 24’ 56” 17.91 Sagitta
2020 Apr 03 20h 02m 26s +21° 28’ 27” 17.90 Sagitta
2020 Apr 04 20h 02m 17s +21° 32’ 02” 17.89 Sagitta
2020 Apr 05 20h 02m 08s +21° 35’ 36” 17.88 Sagitta
2020 Apr 06 20h 01m 55s +21° 39’ 12” 17.87 Vulpecula
2020 Apr 07 20h 01m 44s +21° 42’ 51” 17.86 Vulpecula
2020 Apr 08 20h 01m 32s +21° 46’ 29” 17.85 Vulpecula
2020 Apr 09 20h 01m 18s +21° 50’ 08” 17.84 Vulpecula
2020 Apr 10 20h 01m 02s +21° 53’ 49” 17.83 Vulpecula