Comet Leonard (C/2021 A1)

Comet Leonard (C/2021 A1) is currently in the constellation of Ophiucus.

The current Right Ascension of Comet Leonard (C/2021 A1) is 16h 38m 47s and the Declination is -14° 04’ 35” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current estimated magnitude of Comet Leonard (C/2021 A1) is 19.84 (JPL).

The observed values of Magnitude, Coma Diameter and Tail Length are derived from the most recent observation recorded at the Comet Observers Database. The value of Predicted Magnitude comes from the JPL Horizons ephemerides service and, in the case of comets, might be inaccurate given the highly dynamic and unpredictable behavior of these objects. When available, please refer to the Observed Magnitude value and consider the Predicted 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.

Today's rise, transit and set times of Comet Leonard (C/2021 A1) from Greenwich, United Kingdom edit_location_alt (all times relative to the local timezone Europe/London):

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Available Resources

• Position and finder charts (see also Where is Comet Leonard (C/2021 A1)?)
• Distance from Earth (see also How far is Comet Leonard (C/2021 A1) from Earth?)
• When does Comet Leonard (C/2021 A1) rise and set?
• Brightness (see also How bright is Comet Leonard (C/2021 A1)?)
• Orbital elements. Detailed information about Comet Leonard (C/2021 A1) orbital parameters.
• Interactive orbit visualization. 3d visualization showing the orbit of Comet Leonard (C/2021 A1) with respect to the major Solar System objects.
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Comet Leonard (C/2021 A1) for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Comet Leonard (C/2021 A1) in the sky from your location.
• Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Comet Leonard (C/2021 A1) with your telescope or on your astrophotographies.

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet Leonard (C/2021 A1) is right now. Click on the image to see a more detailed fullscreen tracker view.

Also check out Where is Comet Leonard (C/2021 A1)?, a page that provides all the information needed to find Comet Leonard (C/2021 A1) in the sky and additional links to sky charts.

Comet Leonard (C/2021 A1) Distance from Earth

The distance of Comet Leonard (C/2021 A1) from Earth is currently 817,215,911 kilometers, equivalent to 5.462751 Astronomical Units. Light takes 45 minutes and 25.9389 seconds to travel from Comet Leonard (C/2021 A1) and arrive to us.

The following chart shows the distance of Comet Leonard (C/2021 A1) 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/2021 A1 (Leonard) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach of Comet Leonard (C/2021 A1) to Earth

Between 1 January 2013 and 30 December 2100, the closest approach of Comet Leonard (C/2021 A1) to Earth happens on Mon Dec 13 2021 at a distance of 0.233994 Astronomical Units, or 35,005,002 kilometers:

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

Comet Leonard (C/2021 A1) Brightness and Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet Leonard (C/2021 A1), 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.

Visualization of Comet Leonard (C/2021 A1) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet Leonard (C/2021 A1) with respect of the Sun and the orbits of the major planets. The position of Comet Leonard (C/2021 A1) 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 Leonard (C/2021 A1) 15 Days Ephemeris

The following table lists the ephemerides of Comet Leonard (C/2021 A1) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet Leonard (C/2021 A1) in our Online Planetarium at the chosen date.

Date	Right AscensionR.A.	DeclinationDec.	MagnitudeMag	Constellation
2023 May 21	16h 45m 11s	-14° 28’ 50”	19.79	Ophiucus
2023 May 22	16h 44m 21s	-14° 25’ 42”	19.80	Ophiucus
2023 May 23	16h 43m 33s	-14° 22’ 36”	19.80	Ophiucus
2023 May 24	16h 42m 44s	-14° 19’ 31”	19.81	Ophiucus
2023 May 25	16h 41m 57s	-14° 16’ 27”	19.81	Ophiucus
2023 May 26	16h 41m 08s	-14° 13’ 23”	19.82	Ophiucus
2023 May 27	16h 40m 19s	-14° 10’ 20”	19.82	Ophiucus
2023 May 28	16h 39m 32s	-14° 07’ 21”	19.83	Ophiucus
2023 May 29	16h 38m 44s	-14° 04’ 20”	19.84	Ophiucus
2023 May 30	16h 37m 55s	-14° 01’ 23”	19.84	Ophiucus
2023 May 31	16h 37m 08s	-13° 58’ 26”	19.85	Ophiucus
2023 Jun 01	16h 36m 20s	-13° 55’ 30”	19.85	Ophiucus
2023 Jun 02	16h 35m 31s	-13° 52’ 36”	19.86	Ophiucus
2023 Jun 03	16h 34m 45s	-13° 49’ 44”	19.87	Ophiucus