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🌎 Location: Greenwich, United Kingdom [change]

Comet C/2018 F4 (PANSTARRS)

Comet C/2018 F4 (PANSTARRS) is currently in the constellation of Cetus. The current Right Ascension of Comet C/2018 F4 (PANSTARRS) is 01h 13m 54s and the Declination is -20° 22’ 47” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2018 F4 (PANSTARRS) is 19.26 (JPL) while the latest observed magnitude is 17.1 (COBS).

Summary of key facts about Comet C/2018 F4 (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]:

01h 13m 54s
-20° 22’ 47”
  • C/2018 F4 (PANSTARRS) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South-South-East direction at an altitude of 16° above the horizon.
  • Given its current magnitude, C/2018 F4 (PANSTARRS) is visible only through long exposure photography.
  • See also C/2018 F4 (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/2018 F4 (PANSTARRS) available on TheSkyLive:

Available Resources

Comet C/2018 F4 (PANSTARRS) Position and Finder Charts

Below we provide Comet C/2018 F4 (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/2018 F4 (PANSTARRS) in Cetus on January, 21 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2018 F4 (PANSTARRS) in Cetus on January, 21 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/2018 F4 (PANSTARRS) is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 01h 13m 54s
Dec: -20° 22’ 47”
Deep sky finder chart for Comet C/2018 F4 (PANSTARRS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2018 F4 (PANSTARRS)?, a page that provides all the information needed to find Comet C/2018 F4 (PANSTARRS) in the sky and additional links to sky charts.

Comet C/2018 F4 (PANSTARRS) Distance from Earth

The distance of Comet C/2018 F4 (PANSTARRS) from Earth is currently 794,463,079 kilometers, equivalent to 5.310658 Astronomical Units. Light takes 44 minutes and 10.0436 seconds to travel from Comet C/2018 F4 (PANSTARRS) and arrive to us.

44 minutes and 10.0436 seconds

The following chart shows the distance of Comet C/2018 F4 (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/2018 F4 (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/2018 F4 (PANSTARRS) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2018 F4 (PANSTARRS) to Earth

Between January 2013 and December 2100, the closest approach of Comet C/2018 F4 (PANSTARRS) to Earth happens on Tue May 7 2019 at a distance of 3.252379 Astronomical Units, or 486,549,045 kilometers:

Tue May 7 2019

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

Comet C/2018 F4 (PANSTARRS) brightness

The current visual magnitude of Comet C/2018 F4 (PANSTARRS) is 19.26.


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/2018 F4 (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/2018 F4 (PANSTARRS) between January 2013 and December 2100

Comet C/2018 F4 (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/2018 F4 (PANSTARRS) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 110.4°
Max altitude: 18.2°
Azimuth: 249.7°

The rise and set times are defined as the time at which the upper limb of Comet C/2018 F4 (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/2018 F4 (PANSTARRS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2018 F4 (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/2018 F4 (PANSTARRS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 14 01h 13m 06s -21° 55’ 12” 19.15 Cetus
2021 Jan 15 01h 13m 10s -21° 43’ 00” 19.17 Cetus
2021 Jan 16 01h 13m 14s -21° 30’ 50” 19.18 Cetus
2021 Jan 17 01h 13m 20s -21° 18’ 42” 19.20 Cetus
2021 Jan 18 01h 13m 27s -21° 06’ 37” 19.21 Cetus
2021 Jan 19 01h 13m 33s -20° 54’ 33” 19.22 Cetus
2021 Jan 20 01h 13m 41s -20° 42’ 33” 19.24 Cetus
2021 Jan 21 01h 13m 49s -20° 30’ 37” 19.25 Cetus
2021 Jan 22 01h 13m 58s -20° 18’ 42” 19.26 Cetus
2021 Jan 23 01h 14m 08s -20° 06’ 50” 19.28 Cetus
2021 Jan 24 01h 14m 17s -19° 55’ 00” 19.29 Cetus
2021 Jan 25 01h 14m 29s -19° 43’ 14” 19.30 Cetus
2021 Jan 26 01h 14m 39s -19° 31’ 31” 19.32 Cetus
2021 Jan 27 01h 14m 53s -19° 19’ 50” 19.33 Cetus