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Comet C/2017 S3 (PANSTARRS)

Available Resources

Comet C/2017 S3 (PANSTARRS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 S3 (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 S3 (PANSTARRS) in Hydra on August, 17 2018
High Precision Live Sky Chart
09h 37m 30s
+01° 43’ 55”
 = 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 S3 (PANSTARRS) Rise and Set Times

Today's Comet C/2017 S3 (PANSTARRS) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 88.3°
Max altitude: 40.3°
Azimuth: 271.7°

Comet C/2017 S3 (PANSTARRS) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 S3 (PANSTARRS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 S3 (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 S3 (PANSTARRS)
View Comet C/2017 S3 (PANSTARRS) in the 3D Solar System Simulator

Comet C/2017 S3 (PANSTARRS) Ephemeris

The following table lists the ephemerides of Comet C/2017 S3 (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 S3 (PANSTARRS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Aug 10 08h 27m 11s +15° 43’ 18” 8.00 Cancer
2018 Aug 11 08h 37m 11s +12° 48’ 23” 8.00 Cancer
2018 Aug 12 08h 47m 12s +10° 04’ 03” 8.00 Cancer
2018 Aug 13 08h 57m 15s +07° 35’ 40” 8.00 Cancer
2018 Aug 14 09h 07m 11s +05° 28’ 41” 7.76 Hydra
2018 Aug 15 09h 17m 00s +03° 47’ 40” 7.72 Hydra
2018 Aug 16 09h 26m 33s +02° 35’ 02” 7.78 Hydra
2018 Aug 17 09h 35m 39s +01° 50’ 04” 7.94 Hydra
2018 Aug 18 09h 44m 11s +01° 29’ 03” 8.17 Sextans
2018 Aug 19 09h 52m 05s +01° 26’ 36” 8.47 Sextans
2018 Aug 20 09h 59m 24s +01° 37’ 18” 8.79 Sextans
2018 Aug 21 10h 06m 06s +01° 56’ 39” 9.12 Sextans
2018 Aug 22 10h 12m 19s +02° 21’ 24” 9.44 Sextans
2018 Aug 23 10h 18m 03s +02° 49’ 17” 9.75 Sextans

Distance of Comet C/2017 S3 (PANSTARRS) from Earth

The following chart shows the distance of Comet C/2017 S3 (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 S3 (PANSTARRS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2017 S3 (PANSTARRS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 S3 (PANSTARRS)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 S3 (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 S3 (PANSTARRS) between January 2013 and December 2075

Comet C/2017 S3 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 S3 (PANSTARRS) at epoch 21 January 2018 00:00 UTC (JD: 2458140.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00007873
Orbit inclination i 99.04086842°
Perihelion distance q 0.20841408 AU
31,178,303 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2018-Aug-15 22:40:28
2,458,346.4448 JD
Argument of perihelion peri 255.89284567922°
Longitude of the ascending node node 171.03343170999°
Mean anomaly M -0.0014901957890373°
Mean motion n 0.00000724°/day
Closest approach to Earth* 2018-Aug-07
Distance of closest approach* 0.75800965 AU
113,396,629 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.