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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 August, 20 2018
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
11h 45m 26s
+39° 19’ 33”
14.2
15.58
1.8'

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.

Comet C/2015 O1 (PANSTARRS) Rise and Set Times

Comet C/2015 O1 (PANSTARRS) is circumpolar from Greenwich, United Kingdom [change] and transits at 13:50 UTC (altitude: 77.8°)

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 Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Aug 13 11h 44m 25s +40° 18’ 43” 15.54 Ursa Major
2018 Aug 14 11h 44m 31s +40° 10’ 09” 15.55 Ursa Major
2018 Aug 15 11h 44m 39s +40° 01’ 39” 15.55 Ursa Major
2018 Aug 16 11h 44m 48s +39° 53’ 16” 15.56 Ursa Major
2018 Aug 17 11h 44m 57s +39° 44’ 58” 15.56 Ursa Major
2018 Aug 18 11h 45m 06s +39° 36’ 47” 15.57 Ursa Major
2018 Aug 19 11h 45m 15s +39° 28’ 42” 15.58 Ursa Major
2018 Aug 20 11h 45m 24s +39° 20’ 44” 15.58 Ursa Major
2018 Aug 21 11h 45m 34s +39° 12’ 51” 15.59 Ursa Major
2018 Aug 22 11h 45m 46s +39° 05’ 04” 15.60 Ursa Major
2018 Aug 23 11h 45m 56s +38° 57’ 24” 15.60 Ursa Major
2018 Aug 24 11h 46m 08s +38° 49’ 50” 15.61 Ursa Major
2018 Aug 25 11h 46m 19s +38° 42’ 20” 15.61 Ursa Major
2018 Aug 26 11h 46m 32s +38° 34’ 59” 15.62 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 09 August 2017 00:00 UTC (JD: 2457975.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99995693
Orbit inclination i 127.20922722°
Perihelion distance q 3.72971047 AU
557,956,745 km
Aphelion distance Q 173,175.40278837 AU
25,906,671,566,707 km
Semi-major axis a 86,589.56624942 AU
12,953,614,761,726 km
Orbital period period 25,480,418.0200 years
9,306,722,680.3447 days
Date of perihelion transit Tp 2018-Feb-18 23:38:43
2,458,168.4852 JD
Next perihelion transit 2018-Feb-18 23:38
9,309,180,848.8299 JD
Argument of perihelion peri 89.580383460497°
Longitude of the ascending node node 299.84854861649°
Mean anomaly M 359.999992535°
Mean motion n 0.00000004°/day
Closest approach to Earth* 2018-Apr-05
Distance of closest approach* 3.23322170 AU
483,683,083 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.