Comet C/2018 R3 (Lemmon)

Comet C/2018 R3 (Lemmon) is currently in the constellation of Antlia. The current Right Ascension of Comet C/2018 R3 (Lemmon) is 09h 47m 05s and the Declination is -32° 24’ 07” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2018 R3 (Lemmon) is 23.32 (JPL).

Summary of key facts about Comet C/2018 R3 (Lemmon) [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]:

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Additional information about Comet C/2018 R3 (Lemmon) available on TheSkyLive:

Available Resources

• Position and finder charts (see also Where is Comet C/2018 R3 (Lemmon)?)
• Distance from Earth (see also How far is Comet C/2018 R3 (Lemmon) from Earth?)
• Rise and set times (see also When does Comet C/2018 R3 (Lemmon) rise and set?)
• Brightness (see also How bright is Comet C/2018 R3 (Lemmon)?)
• Orbital elements. Detailed information about Comet C/2018 R3 (Lemmon) orbital parameters.
• Interactive orbit visualization. 3d visualization showing the orbit of Comet C/2018 R3 (Lemmon) with respect to the major Solar System objects.
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Comet C/2018 R3 (Lemmon) for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Comet C/2018 R3 (Lemmon) in the sky from your location.
• Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Comet C/2018 R3 (Lemmon) with your telescope or on your astrophotographies.

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2018 R3 (Lemmon) is right now. Click on the image to see a more detailed fullscreen tracker view.

Also check out Where is Comet C/2018 R3 (Lemmon)?, a page that provides all the information needed to find Comet C/2018 R3 (Lemmon) in the sky and additional links to sky charts.

Comet C/2018 R3 (Lemmon) Distance from Earth

The distance of Comet C/2018 R3 (Lemmon) from Earth is currently 887,592,855 kilometers, equivalent to 5.933192 Astronomical Units. Light takes 49 minutes and 20.6911 seconds to travel from Comet C/2018 R3 (Lemmon) and arrive to us.

The following chart shows the distance of Comet C/2018 R3 (Lemmon) 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.

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 R3 (Lemmon) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2018 R3 (Lemmon) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2018 R3 (Lemmon) to Earth happens on Thu May 23 2019 at a distance of 1.92176204 Astronomical Units, or 287,491,510 kilometers:

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

Comet C/2018 R3 (Lemmon) brightness

The current visual magnitude of Comet C/2018 R3 (Lemmon) is 23.32.

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 R3 (Lemmon), 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.

Comet C/2018 R3 (Lemmon) rise and set times

Today's Comet C/2018 R3 (Lemmon) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

The rise and set times are defined as the time at which the upper limb of Comet C/2018 R3 (Lemmon) 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.

Visualization of Comet C/2018 R3 (Lemmon) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 R3 (Lemmon) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 R3 (Lemmon) 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!

Comet C/2018 R3 (Lemmon) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2018 R3 (Lemmon) 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 R3 (Lemmon) in our Online Planetarium at the chosen date.

Date	Right AscensionR.A.	DeclinationDec.	MagnitudeMag	Constellation
2020 Aug 05	09h 41m 18s	-31° 43’ 14”	23.21	Antlia
2020 Aug 06	09h 42m 03s	-31° 48’ 12”	23.22	Antlia
2020 Aug 07	09h 42m 47s	-31° 53’ 14”	23.24	Antlia
2020 Aug 08	09h 43m 32s	-31° 58’ 23”	23.25	Antlia
2020 Aug 09	09h 44m 17s	-32° 03’ 36”	23.26	Antlia
2020 Aug 10	09h 45m 02s	-32° 08’ 53”	23.28	Antlia
2020 Aug 11	09h 45m 46s	-32° 14’ 16”	23.29	Antlia
2020 Aug 12	09h 46m 30s	-32° 19’ 42”	23.30	Antlia
2020 Aug 13	09h 47m 14s	-32° 25’ 15”	23.32	Antlia
2020 Aug 14	09h 47m 58s	-32° 30’ 52”	23.33	Antlia
2020 Aug 15	09h 48m 42s	-32° 36’ 34”	23.34	Antlia
2020 Aug 16	09h 49m 27s	-32° 42’ 20”	23.36	Antlia
2020 Aug 17	09h 50m 11s	-32° 48’ 12”	23.37	Antlia
2020 Aug 18	09h 50m 54s	-32° 54’ 09”	23.38	Antlia