Your guide to the Solar System and the night sky
Please donate now to help keep TheSkyLive ads-free. This site cannot run without your voluntary donations.
🌎  Greenwich, United Kingdom [change]

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 58m 21s and the Declination is +54° 06’ 39” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2019 U6 (Lemmon) is 25.17 (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 58m 21s
+54° 06’ 39”
  • C/2019 U6 (Lemmon) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the West-North-West direction at an altitude of 72° 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 October, 01 2022
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2019 U6 (Lemmon) in Cygnus on October, 01 2022
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 58m 21s
Dec: +54° 06’ 39”
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 1,250,301,998 kilometers, equivalent to 8.357753 Astronomical Units. Light takes 1 hours, 9 minutes and 30.5585 seconds to travel from Comet C/2019 U6 (Lemmon) and arrive to us.

1 hours, 9 minutes and 30.5585 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 123,713,203 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 25.17.


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 21:16 UTC (altitude: 87.4°)

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 27 April 2020 00:00 UTC (JD: 2458967.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99790319
Orbit inclination i 61.00133862°
Perihelion distance q 0.91426407 AU
136,771,958 km
Aphelion distance Q 871.13759163 AU
130,320,329,057 km
Semi-major axis a 436.02592785 AU
65,228,550,507 km
Orbital period period 9,104.9313 years
3,325,576.1682 days
Date of perihelion transit Tp 2020-Jun-18 19:43:24
2,459,019.3218 JD
Next perihelion transit 11125-Aug-01 23:45
5,784,595.4900 JD
Argument of perihelion peri 329.65905805444°
Longitude of the ascending node node 235.70575453166°
Mean anomaly M 359.9943901889°
Mean motion n 0.00010825°/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
2022 Sep 24 22h 01m 59s +54° 45’ 02” 25.13 Cygnus
2022 Sep 25 22h 01m 31s +54° 40’ 29” 25.14 Cygnus
2022 Sep 26 22h 01m 01s +54° 35’ 53” 25.14 Cygnus
2022 Sep 27 22h 00m 33s +54° 31’ 10” 25.15 Cygnus
2022 Sep 28 22h 00m 05s +54° 26’ 22” 25.15 Cygnus
2022 Sep 29 21h 59m 38s +54° 21’ 32” 25.16 Cygnus
2022 Sep 30 21h 59m 12s +54° 16’ 35” 25.16 Cygnus
2022 Oct 01 21h 58m 45s +54° 11’ 35” 25.17 Cygnus
2022 Oct 02 21h 58m 21s +54° 06’ 29” 25.17 Cygnus
2022 Oct 03 21h 57m 56s +54° 01’ 21” 25.18 Cygnus
2022 Oct 04 21h 57m 32s +53° 56’ 08” 25.18 Cygnus
2022 Oct 05 21h 57m 09s +53° 50’ 50” 25.19 Cygnus
2022 Oct 06 21h 56m 45s +53° 45’ 30” 25.19 Cygnus
2022 Oct 07 21h 56m 25s +53° 40’ 06” 25.20 Cygnus