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Comet C/2019 U6 (Lemmon)

Comet C/2019 U6 (Lemmon) is currently in the constellation of Cygnus. The current Right Ascension of Comet C/2019 U6 (Lemmon) is 21h 56m 40s and the Declination is +48° 14’ 46” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2019 U6 (Lemmon) is 21.49 (JPL).

Summary of key facts about Comet C/2019 U6 (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]:

21h 56m 40s
+48° 14’ 46”
  • C/2019 U6 (Lemmon) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the East-North-East direction at an altitude of 61° above the horizon.
  • Given its current magnitude, C/2019 U6 (Lemmon) is visible only through long exposure photography.
  • See also C/2019 U6 (Lemmon) 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/2019 U6 (Lemmon) available on TheSkyLive:

Available Resources

Comet C/2019 U6 (Lemmon) Position and Finder Charts

Below we provide Comet C/2019 U6 (Lemmon) 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/2019 U6 (Lemmon) in Cygnus on May, 09 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2019 U6 (Lemmon) in Cygnus on May, 09 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/2019 U6 (Lemmon) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2019 U6 (Lemmon)
RA: 21h 56m 40s
Dec: +48° 14’ 46”
Deep sky finder chart for Comet C/2019 U6 (Lemmon)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2019 U6 (Lemmon)?, a page that provides all the information needed to find Comet C/2019 U6 (Lemmon) in the sky and additional links to sky charts.

Comet C/2019 U6 (Lemmon) Distance from Earth

The distance of Comet C/2019 U6 (Lemmon) from Earth is currently 706,294,079 kilometers, equivalent to 4.721284 Astronomical Units. Light takes 39 minutes and 15.9435 seconds to travel from Comet C/2019 U6 (Lemmon) and arrive to us.

39 minutes and 15.9435 seconds

The following chart shows the distance of Comet C/2019 U6 (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.

Distance of Comet C/2019 U6 (Lemmon) 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/2019 U6 (Lemmon) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2019 U6 (Lemmon) to Earth

Between January 2013 and December 2100, the closest approach of Comet C/2019 U6 (Lemmon) to Earth happens on Mon Jun 29 2020 at a distance of 0.826972 Astronomical Units, or 123,713,206 kilometers:

Mon Jun 29 2020

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

Comet C/2019 U6 (Lemmon) brightness

The current visual magnitude of Comet C/2019 U6 (Lemmon) is 21.49.


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/2019 U6 (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.

Predicted magnitude of Comet C/2019 U6 (Lemmon) between January 2013 and December 2100

Comet C/2019 U6 (Lemmon) rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Comet C/2019 U6 (Lemmon) is circumpolar and transits at 06:47 UTC (altitude: 86.8°)

The rise and set times are defined as the time at which the upper limb of Comet C/2019 U6 (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.

Comet C/2019 U6 (Lemmon) Orbital Elements

The following table lists the orbital elements of Comet C/2019 U6 (Lemmon) at epoch 26 April 2020 00:00 UTC (JD: 2458966.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99790347
Orbit inclination i 61.00133602°
Perihelion distance q 0.91426428 AU
136,771,990 km
Aphelion distance Q 871.25423753 AU
130,337,779,034 km
Semi-major axis a 436.08425090 AU
65,237,275,512 km
Orbital period period 9,106.7600 years
3,326,243.4367 days
Date of perihelion transit Tp 2020-Jun-18 19:43:23
2,459,019.3218 JD
Next perihelion transit 11127-May-31 06:12
5,785,262.7585 JD
Argument of perihelion peri 329.6590298743°
Longitude of the ascending node node 235.70575930486°
Mean anomaly M 359.99428308577°
Mean motion n 0.00010823°/day

Visualization of Comet C/2019 U6 (Lemmon) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2019 U6 (Lemmon) with respect of the Sun and the orbits of the major planets. The position of Comet C/2019 U6 (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!

Orbit Diagram of Comet C/2019 U6 (Lemmon)
View Comet C/2019 U6 (Lemmon) in the 3D Solar System Simulator

Comet C/2019 U6 (Lemmon) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2019 U6 (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/2019 U6 (Lemmon) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 May 02 21h 53m 24s +46° 51’ 38” 21.43 Cygnus
2021 May 03 21h 53m 54s +47° 03’ 20” 21.44 Cygnus
2021 May 04 21h 54m 24s +47° 15’ 00” 21.45 Cygnus
2021 May 05 21h 54m 52s +47° 26’ 39” 21.46 Cygnus
2021 May 06 21h 55m 20s +47° 38’ 17” 21.47 Cygnus
2021 May 07 21h 55m 46s +47° 49’ 53” 21.48 Cygnus
2021 May 08 21h 56m 12s +48° 01’ 27” 21.49 Cygnus
2021 May 09 21h 56m 36s +48° 13’ 00” 21.49 Cygnus
2021 May 10 21h 57m 01s +48° 24’ 30” 21.50 Cygnus
2021 May 11 21h 57m 24s +48° 36’ 01” 21.51 Cygnus
2021 May 12 21h 57m 44s +48° 47’ 27” 21.52 Cygnus
2021 May 13 21h 58m 05s +48° 58’ 53” 21.53 Cygnus
2021 May 14 21h 58m 24s +49° 10’ 15” 21.54 Cygnus
2021 May 15 21h 58m 42s +49° 21’ 35” 21.55 Cygnus