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Comet C/2015 O1 (PANSTARRS)

Available Resources

Comet C/2015 O1 (PANSTARRS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2015 O1 (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/2015 O1 (PANSTARRS) in Ursa Major on May, 28 2018
High Precision Live Sky Chart
12h 38m 11s
+54° 41’ 53”
 = 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/2015 O1 (PANSTARRS) Rise and Set Times

Comet C/2015 O1 (PANSTARRS) is circumpolar from Greenwich, United Kingdom [change] and transits at 20:12 UTC (altitude: 86.8°)

Comet C/2015 O1 (PANSTARRS) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2015 O1 (PANSTARRS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2015 O1 (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/2015 O1 (PANSTARRS)
View Comet C/2015 O1 (PANSTARRS) in the 3D Solar System Simulator

Comet C/2015 O1 (PANSTARRS) Ephemeris

The following table lists the ephemerides of Comet C/2015 O1 (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/2015 O1 (PANSTARRS) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 May 21 14.62 12h 55m 05s +55° 46’ 08” Ursa Major
2018 May 22 14.63 12h 52m 28s +55° 37’ 51” Ursa Major
2018 May 23 14.64 12h 49m 56s +55° 29’ 17” Ursa Major
2018 May 24 14.65 12h 47m 29s +55° 20’ 21” Ursa Major
2018 May 25 14.66 12h 45m 03s +55° 11’ 09” Ursa Major
2018 May 26 14.67 12h 42m 42s +55° 01’ 40” Ursa Major
2018 May 27 14.69 12h 40m 24s +54° 51’ 54” Ursa Major
2018 May 28 14.70 12h 38m 11s +54° 41’ 53” Ursa Major
2018 May 29 14.71 12h 36m 01s +54° 31’ 37” Ursa Major
2018 May 30 14.72 12h 33m 53s +54° 21’ 08” Ursa Major
2018 May 31 14.73 12h 31m 50s +54° 10’ 27” Ursa Major
2018 Jun 01 14.74 12h 29m 49s +53° 59’ 35” Ursa Major
2018 Jun 02 14.75 12h 27m 53s +53° 48’ 30” Ursa Major
2018 Jun 03 14.76 12h 26m 00s +53° 37’ 17” Ursa Major

Distance of Comet C/2015 O1 (PANSTARRS) from Earth

The following chart shows the distance of Comet C/2015 O1 (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/2015 O1 (PANSTARRS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2015 O1 (PANSTARRS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2015 O1 (PANSTARRS)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2015 O1 (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/2015 O1 (PANSTARRS) between January 2013 and December 2075

Comet C/2015 O1 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2015 O1 (PANSTARRS) at epoch 06 July 2017 00:00 UTC (JD: 2457941.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99992760
Orbit inclination i 127.20891674°
Perihelion distance q 3.72974034 AU
557,961,214 km
Aphelion distance Q 103,023.34721236 AU
15,412,073,406,264 km
Semi-major axis a 51,513.53847635 AU
7,706,315,683,739 km
Orbital period period 11,692,039.5600 years
4,270,517,451.0079 days
Date of perihelion transit Tp 2018-Feb-18 23:34:19
2,458,168.4822 JD
Next perihelion transit 2018-Feb-18 23:34
4,272,975,619.4901 JD
Argument of perihelion peri 89.579024225579°
Longitude of the ascending node node 299.84805622697°
Mean anomaly M 359.99998086565°
Mean motion n 0.00000008°/day
Closest approach to Earth* 2018-Apr-05
Distance of closest approach* 3.23323252 AU
483,684,702 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.