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🌎 Location: Greenwich, United Kingdom [change]

Comet C/2015 ER61 (PANSTARRS)

Comet C/2015 ER61 (PANSTARRS) is currently in the constellation of Taurus. The current Right Ascension of Comet C/2015 ER61 (PANSTARRS) is 05h 47m 37s and the Declination is +19° 32’ 33” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2015 ER61 (PANSTARRS) is 22.59 (JPL).

Summary of key facts about Comet C/2015 ER61 (PANSTARRS) [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

05h 47m 37s
+19° 32’ 33”
  • C/2015 ER61 (PANSTARRS) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the East-North-East direction at an altitude of 12° above the horizon.
  • Given its current magnitude, C/2015 ER61 (PANSTARRS) is visible only through long exposure photography.
  • See also C/2015 ER61 (PANSTARRS) rise and set times.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Additional information about Comet C/2015 ER61 (PANSTARRS) available on TheSkyLive:

Available Resources

Comet C/2015 ER61 (PANSTARRS) Position and Finder Charts

Below we provide Comet C/2015 ER61 (PANSTARRS) finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Comet C/2015 ER61 (PANSTARRS) in Taurus on January, 25 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2015 ER61 (PANSTARRS) in Taurus on January, 25 2021
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2015 ER61 (PANSTARRS) is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 05h 47m 37s
Dec: +19° 32’ 33”
Deep sky finder chart for Comet C/2015 ER61 (PANSTARRS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2015 ER61 (PANSTARRS)?, a page that provides all the information needed to find Comet C/2015 ER61 (PANSTARRS) in the sky and additional links to sky charts.

Comet C/2015 ER61 (PANSTARRS) Distance from Earth

The distance of Comet C/2015 ER61 (PANSTARRS) from Earth is currently 1,750,030,854 kilometers, equivalent to 11.698234 Astronomical Units. Light takes 1 hours, 37 minutes and 17.4746 seconds to travel from Comet C/2015 ER61 (PANSTARRS) and arrive to us.

1 hours, 37 minutes and 17.4746 seconds

The following chart shows the distance of Comet C/2015 ER61 (PANSTARRS) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Comet C/2015 ER61 (PANSTARRS) from Earth between January 2013 and December 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2015 ER61 (PANSTARRS) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2015 ER61 (PANSTARRS) to Earth

Between January 2013 and December 2100, the closest approach of Comet C/2015 ER61 (PANSTARRS) to Earth happens on Wed Apr 19 2017 at a distance of 1.178464 Astronomical Units, or 176,295,709 kilometers:

Wed Apr 19 2017

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Comet C/2015 ER61 (PANSTARRS) brightness

The current visual magnitude of Comet C/2015 ER61 (PANSTARRS) is 22.59.


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 behavior 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.

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 2100

Comet C/2015 ER61 (PANSTARRS) rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

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

Azimuth: 70.5°
Max altitude: 58.1°
Azimuth: 289.5°

The rise and set times are defined as the time at which the upper limb of Comet C/2015 ER61 (PANSTARRS) touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2015 ER61 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2015 ER61 (PANSTARRS) at epoch 29 April 2017 00:00 UTC (JD: 2457873.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99727860
Orbit inclination i 6.34864858°
Perihelion distance q 1.04213192 AU
155,900,716 km
Aphelion distance Q 764.83704121 AU
114,417,993,027 km
Semi-major axis a 382.93958656 AU
57,286,946,872 km
Orbital period period 7,493.8300 years
2,737,119.9051 days
Date of perihelion transit Tp 2017-May-09 22:39:09
2,457,883.4439 JD
Next perihelion transit 9511-May-03 20:22
5,195,003.3489 JD
Argument of perihelion peri 68.192260069465°
Longitude of the ascending node node 235.22173967629°
Mean anomaly M 359.99869213221°
Mean motion n 0.00013153°/day

Visualization of Comet C/2015 ER61 (PANSTARRS) Orbit

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) 15 Days 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 Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 18 05h 49m 33s +19° 31’ 59” 22.56 Orion
2021 Jan 19 05h 49m 18s +19° 32’ 03” 22.56 Taurus
2021 Jan 20 05h 49m 01s +19° 32’ 07” 22.57 Taurus
2021 Jan 21 05h 48m 46s +19° 32’ 11” 22.57 Taurus
2021 Jan 22 05h 48m 30s +19° 32’ 16” 22.58 Taurus
2021 Jan 23 05h 48m 15s +19° 32’ 20” 22.58 Taurus
2021 Jan 24 05h 48m 01s +19° 32’ 25” 22.59 Taurus
2021 Jan 25 05h 47m 45s +19° 32’ 30” 22.59 Taurus
2021 Jan 26 05h 47m 31s +19° 32’ 35” 22.59 Taurus
2021 Jan 27 05h 47m 17s +19° 32’ 42” 22.60 Taurus
2021 Jan 28 05h 47m 03s +19° 32’ 48” 22.60 Taurus
2021 Jan 29 05h 46m 50s +19° 32’ 54” 22.61 Taurus
2021 Jan 30 05h 46m 37s +19° 33’ 02” 22.61 Taurus
2021 Jan 31 05h 46m 24s +19° 33’ 08” 22.62 Taurus