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Comet C/2015 ER61 (PANSTARRS)

Available Resources

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 Aquarius on April, 23 2017
High Precision Live Sky Chart
22h 18m 38s
-06° 00’ 02”
 = 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: 96.0°
Max altitude: 32.5°
Azimuth: 264.0°

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 Apr 16 9.64 21h 44m 42s -09° 37’ 54” Capricornus
2017 Apr 17 9.62 21h 49m 36s -09° 07’ 18” Capricornus
2017 Apr 18 9.60 21h 54m 30s -08° 36’ 29” Capricornus
2017 Apr 19 9.59 21h 59m 22s -08° 05’ 27” Aquarius
2017 Apr 20 9.57 22h 04m 14s -07° 34’ 17” Aquarius
2017 Apr 21 9.56 22h 09m 02s -07° 02’ 57” Aquarius
2017 Apr 22 9.54 22h 13m 50s -06° 31’ 32” Aquarius
2017 Apr 23 9.53 22h 18m 38s -06° 00’ 02” Aquarius
2017 Apr 24 9.52 22h 23m 21s -05° 28’ 28” Aquarius
2017 Apr 25 9.51 22h 28m 05s -04° 56’ 54” Aquarius
2017 Apr 26 9.50 22h 32m 45s -04° 25’ 22” Aquarius
2017 Apr 27 9.49 22h 37m 26s -03° 53’ 49” Aquarius
2017 Apr 28 9.48 22h 42m 02s -03° 22’ 23” Aquarius
2017 Apr 29 9.48 22h 46m 38s -02° 51’ 00” Aquarius

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 2014 and January 2035

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 2014 and January 2035

Comet C/2015 ER61 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2015 ER61 (PANSTARRS) at epoch 04 June 2016 00:00 UTC (JD: 2457544.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99851036
Orbit inclination i 6.31499840°
Perihelion distance q 1.04335646 AU
156,083,905 km
Aphelion distance Q 1,399.76930505 AU
209,402,507,926 km
Semi-major axis a 700.40633075 AU
104,779,295,915 km
Orbital period period 18,536.7400 years
6,770,543.3201 days
Date of perihelion transit Tp 2017-May-09 17:51:08
2,457,883.2438 JD
Argument of perihelion peri 67.727985810867°
Longitude of the ascending node node 235.5921842261°
Mean anomaly M 359.98198847881°
Mean motion n 0.00005317°/day
Closest approach to Earth* 2017-Apr-19
Distance of closest approach* 1.17845760 AU
176,294,748 km

* NOTE: values for the closest approach are computed for the time interval between 2014-Jan-01 and 2035-Jan-01, with a sampling interval of 1 day.