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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 5:57  ☀️ Transit: 12:05  🌅 Sunset: 18:14

Comet C/2023 A1 (Leonard)

Comet C/2023 A1 (Leonard) is currently in the constellation of Lynx. The current Right Ascension of Comet C/2023 A1 (Leonard) is 07h 27m 08s and the Declination is +47° 03’ 27” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2023 A1 (Leonard) is 17.77 (JPL).

07h 27m 08s
+47° 03’ 27”

Today's rise, transit and set times of Comet C/2023 A1 (Leonard) from Greenwich, United Kingdom [change] (all times relative to the local timezone Europe/London):

Today Comet C/2023 A1 (Leonard) is circumpolar and transits at 19:23 UTC reaching a maximum altitude of 85.6°.
  • C/2023 A1 (Leonard) is above the horizon from Greenwich, United Kingdom [change].
  • Right now it is placed in the East direction at an altitude of 71° above the horizon.
  • Given its current magnitude, C/2023 A1 (Leonard) is visible only through long exposure photography.
  • 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.

Available Resources

Comet C/2023 A1 (Leonard) Position and Finder Charts

Below we provide Comet C/2023 A1 (Leonard) 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/2023 A1 (Leonard) in Lynx on March, 23 2023
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2023 A1 (Leonard) in Lynx on March, 23 2023
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/2023 A1 (Leonard) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2023 A1 (Leonard)
RA: 07h 27m 08s
Dec: +47° 03’ 27”
Deep sky finder chart for Comet C/2023 A1 (Leonard)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2023 A1 (Leonard)?, a page that provides all the information needed to find Comet C/2023 A1 (Leonard) in the sky and additional links to sky charts.

Comet C/2023 A1 (Leonard) Distance from Earth

The distance of Comet C/2023 A1 (Leonard) from Earth is currently 200,862,341 kilometers, equivalent to 1.342682 Astronomical Units. Light takes 11 minutes and 10.0047 seconds to travel from Comet C/2023 A1 (Leonard) and arrive to us.

11 minutes and 10.0047 seconds

The following chart shows the distance of Comet C/2023 A1 (Leonard) 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.

Chart of the distance of Comet C/2023 A1 (Leonard) from Earth in Astronomical Units (au)

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/2023 A1 (Leonard) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach of Comet C/2023 A1 (Leonard) to Earth

Between 1 January 2014 and 31 December 2099, the closest approach of Comet C/2023 A1 (Leonard) to Earth happens on Thu Mar 2 2023 at a distance of 1.186987 Astronomical Units, or 177,570,761 kilometers:

Thu Mar 2 2023

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

Comet C/2023 A1 (Leonard) Brightness

The current visual magnitude of Comet C/2023 A1 (Leonard) is 17.77.


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/2023 A1 (Leonard), 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.

Chart of the magnitude of Comet C/2023 A1 (Leonard) as a function of time

Comet C/2023 A1 (Leonard) Orbital Elements

The following table lists the orbital elements of Comet C/2023 A1 (Leonard) at epoch 15 January 2023 00:00 UTC (JD: 2459960.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99319764
Orbit inclination i 94.75134872°
Perihelion distance q 1.83476584 AU
274,477,064 km
Aphelion distance Q 537.61541919 AU
80,426,122,127 km
Semi-major axis a 269.72509251 AU
40,350,299,595 km
Orbital period period 4,429.8623 years
1,618,007.2116 days
Date of perihelion transit Tp 2023-Mar-18 17:34:30
2,460,022.2323 JD
Next perihelion transit 6453-Feb-28 22:39
4,078,029.4439 JD
Argument of perihelion peri 159.25490336127°
Longitude of the ascending node node 318.30021765431°
Mean anomaly M 359.98626481462°
Mean motion n 0.00022250°/day

Visualization of Comet C/2023 A1 (Leonard) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2023 A1 (Leonard) with respect of the Sun and the orbits of the major planets. The position of Comet C/2023 A1 (Leonard) 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/2023 A1 (Leonard)
View Comet C/2023 A1 (Leonard) in the 3D Solar System Simulator

Comet C/2023 A1 (Leonard) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2023 A1 (Leonard) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2023 A1 (Leonard) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2023 Mar 16 07h 45m 14s +55° 23’ 35” 17.63 Lynx
2023 Mar 17 07h 42m 06s +54° 16’ 36” 17.65 Lynx
2023 Mar 18 07h 39m 14s +53° 10’ 08” 17.66 Lynx
2023 Mar 19 07h 36m 38s +52° 04’ 15” 17.68 Lynx
2023 Mar 20 07h 34m 15s +50° 59’ 05” 17.70 Lynx
2023 Mar 21 07h 32m 06s +49° 54’ 42” 17.72 Lynx
2023 Mar 22 07h 30m 06s +48° 51’ 08” 17.74 Lynx
2023 Mar 23 07h 28m 19s +47° 48’ 29” 17.76 Lynx
2023 Mar 24 07h 26m 42s +46° 46’ 45” 17.78 Lynx
2023 Mar 25 07h 25m 13s +45° 46’ 01” 17.81 Lynx
2023 Mar 26 07h 23m 52s +44° 46’ 18” 17.83 Lynx
2023 Mar 27 07h 22m 39s +43° 47’ 36” 17.86 Auriga
2023 Mar 28 07h 21m 33s +42° 49’ 59” 17.88 Auriga
2023 Mar 29 07h 20m 33s +41° 53’ 26” 17.91 Auriga