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🌎 Location: Greenwich, United Kingdom [change]

Comet C/2020 U4 (PANSTARRS)

Comet C/2020 U4 (PANSTARRS) is currently in the constellation of Gemini. The current Right Ascension of Comet C/2020 U4 (PANSTARRS) is 07h 13m 33s and the Declination is +27° 26’ 17” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2020 U4 (PANSTARRS) is 19.63 (JPL).

Summary of key facts about Comet C/2020 U4 (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]:

07h 13m 33s
+27° 26’ 17”
  • Comet C/2020 U4 is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the West-North-West direction at an altitude of 10° above the horizon.
  • Given its current magnitude, Comet C/2020 U4 is visible only through long exposure photography.
  • See also Comet C/2020 U4 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/2020 U4 (PANSTARRS) available on TheSkyLive:

Available Resources

Comet C/2020 U4 (PANSTARRS) Position and Finder Charts

Below we provide Comet C/2020 U4 (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/2020 U4 (PANSTARRS) in Gemini on November, 24 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2020 U4 (PANSTARRS) in Gemini on November, 24 2020
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/2020 U4 (PANSTARRS) is right now. Click on the image to see a more detailed fullscreen tracker view.

Comet C/2020 U4
RA: 07h 13m 33s
Dec: +27° 26’ 17”
Deep sky finder chart for Comet C/2020 U4 (PANSTARRS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2020 U4 (PANSTARRS)?, a page that provides all the information needed to find Comet C/2020 U4 (PANSTARRS) in the sky and additional links to sky charts.

Comet C/2020 U4 (PANSTARRS) Distance from Earth

The distance of Comet C/2020 U4 (PANSTARRS) from Earth is currently 858,176,258 kilometers, equivalent to 5.736554 Astronomical Units. Light takes 47 minutes and 42.5679 seconds to travel from Comet C/2020 U4 (PANSTARRS) and arrive to us.

47 minutes and 42.5679 seconds

The following chart shows the distance of Comet C/2020 U4 (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/2020 U4 (PANSTARRS) from Earth between January 2014 and January 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 Comet C/2020 U4 from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2020 U4 (PANSTARRS) to Earth

Between January 2014 and January 2100, the closest approach of Comet C/2020 U4 (PANSTARRS) to Earth happens on Tue Nov 30 2021 at a distance of 4.473858 Astronomical Units, or 669,279,557 kilometers:

Tue Nov 30 2021

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

Comet C/2020 U4 (PANSTARRS) brightness

The current visual magnitude of Comet C/2020 U4 (PANSTARRS) is 19.63.


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/2020 U4 (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/2020 U4 (PANSTARRS) between January 2014 and January 2100

Comet C/2020 U4 (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/2020 U4 (PANSTARRS) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 62.5°
Max altitude: 65.9°
Azimuth: 297.4°

The rise and set times are defined as the time at which the upper limb of Comet C/2020 U4 (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/2020 U4 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2020 U4 (PANSTARRS) at epoch 23 July 2020 00:00 UTC (JD: 2459054.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00297746
Orbit inclination i 167.03770714°
Perihelion distance q 5.35357588 AU
800,883,554 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2022-Apr-07 14:41:38
2,459,677.1123 JD
Argument of perihelion peri 69.516603383422°
Longitude of the ascending node node 120.0214742301°
Mean anomaly M -0.0080487007378545°
Mean motion n 0.00001293°/day

Visualization of Comet C/2020 U4 (PANSTARRS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2020 U4 (PANSTARRS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2020 U4 (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/2020 U4 (PANSTARRS)
View Comet C/2020 U4 (PANSTARRS) in the 3D Solar System Simulator

Comet C/2020 U4 (PANSTARRS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2020 U4 (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/2020 U4 (PANSTARRS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Nov 17 07h 19m 50s +27° 01’ 37” 19.69 Gemini
2020 Nov 18 07h 19m 02s +27° 04’ 54” 19.68 Gemini
2020 Nov 19 07h 18m 15s +27° 08’ 12” 19.67 Gemini
2020 Nov 20 07h 17m 25s +27° 11’ 31” 19.66 Gemini
2020 Nov 21 07h 16m 33s +27° 14’ 52” 19.65 Gemini
2020 Nov 22 07h 15m 42s +27° 18’ 11” 19.64 Gemini
2020 Nov 23 07h 14m 49s +27° 21’ 32” 19.63 Gemini
2020 Nov 24 07h 13m 56s +27° 24’ 52” 19.63 Gemini
2020 Nov 25 07h 13m 01s +27° 28’ 13” 19.62 Gemini
2020 Nov 26 07h 12m 06s +27° 31’ 33” 19.61 Gemini
2020 Nov 27 07h 11m 11s +27° 34’ 54” 19.60 Gemini
2020 Nov 28 07h 10m 13s +27° 38’ 16” 19.59 Gemini
2020 Nov 29 07h 09m 15s +27° 41’ 35” 19.58 Gemini
2020 Nov 30 07h 08m 16s +27° 44’ 56” 19.57 Gemini