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Comet C/2015 ER61 (PANSTARRS)

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Comet C/2015 ER61 (PANSTARRS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2015 ER61 (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 ER61 (PANSTARRS) in Aries on July, 25 2017
High Precision Live Sky Chart
03h 16m 54s
+22° 11’ 57”
11.83
 = 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 ER61 (PANSTARRS) Rise and Set Times

Today's Comet C/2015 ER61 (PANSTARRS) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 67.8°
Max altitude: 60.7°
Azimuth: 292.2°

Comet C/2015 ER61 (PANSTARRS) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2015 ER61 (PANSTARRS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2015 ER61 (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 ER61 (PANSTARRS)
View Comet C/2015 ER61 (PANSTARRS) in the 3D Solar System Simulator

Comet C/2015 ER61 (PANSTARRS) Ephemeris

The following table lists the ephemerides of Comet C/2015 ER61 (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 ER61 (PANSTARRS) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Jul 18 11.65 03h 04m 17s +21° 33’ 33” Aries
2017 Jul 19 11.68 03h 06m 11s +21° 39’ 38” Aries
2017 Jul 20 11.70 03h 08m 03s +21° 45’ 29” Aries
2017 Jul 21 11.73 03h 09m 54s +21° 51’ 10” Aries
2017 Jul 22 11.76 03h 11m 41s +21° 56’ 38” Aries
2017 Jul 23 11.78 03h 13m 27s +22° 01’ 55” Aries
2017 Jul 24 11.81 03h 15m 12s +22° 07’ 01” Aries
2017 Jul 25 11.83 03h 16m 54s +22° 11’ 57” Aries
2017 Jul 26 11.85 03h 18m 36s +22° 16’ 41” Aries
2017 Jul 27 11.88 03h 20m 14s +22° 21’ 15” Aries
2017 Jul 28 11.90 03h 21m 51s +22° 25’ 40” Aries
2017 Jul 29 11.93 03h 23m 26s +22° 29’ 53” Aries
2017 Jul 30 11.95 03h 24m 59s +22° 33’ 56” Aries
2017 Jul 31 11.97 03h 26m 30s +22° 37’ 50” Aries

Distance of Comet C/2015 ER61 (PANSTARRS) from Earth

The following chart shows the distance of Comet C/2015 ER61 (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 ER61 (PANSTARRS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2015 ER61 (PANSTARRS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2015 ER61 (PANSTARRS)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2015 ER61 (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 ER61 (PANSTARRS) between January 2013 and December 2075

Comet C/2015 ER61 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2015 ER61 (PANSTARRS) at epoch 15 September 2016 00:00 UTC (JD: 2457647.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99768294
Orbit inclination i 6.34394746°
Perihelion distance q 1.04230136 AU
155,926,065 km
Aphelion distance Q 898.63331951 AU
134,433,631,409 km
Semi-major axis a 449.83781044 AU
67,294,778,737 km
Orbital period period 9,540.9600 years
3,484,836.1381 days
Date of perihelion transit Tp 2017-May-09 21:36:04
2,457,883.4001 JD
Next perihelion transit 11558-Jul-07 00:54
5,942,719.5381 JD
Argument of perihelion peri 68.136990354265°
Longitude of the ascending node node 235.25533735941°
Mean anomaly M 359.97563041209°
Mean motion n 0.00010330°/day
Closest approach to Earth* 2017-Apr-19
Distance of closest approach* 1.17844112 AU
176,292,283 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.