Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

Comet C/2019 U6 (Lemmon)

Comet C/2019 U6 (Lemmon) is currently in the constellation of Hercules. The current Right Ascension of Comet C/2019 U6 (Lemmon) is 17h 13m 22s and the Declination is +23° 04’ 02” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2019 U6 (Lemmon) is 17.78 (JPL) while the latest observed magnitude is 12.9 (COBS).

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]:

17h 13m 22s
+23° 04’ 02”
  • C/2019 U6 (Lemmon) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the West direction at an altitude of 23° above the horizon.
  • Given its current magnitude, C/2019 U6 (Lemmon) is visible with the help of a telescope havng an aperture of 10 inches (250mm) or more.
  • 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 Hercules on October, 22 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2019 U6 (Lemmon) in Hercules on October, 22 2020
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: 17h 13m 22s
Dec: +23° 04’ 02”
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 377,334,363 kilometers, equivalent to 2.522324 Astronomical Units. Light takes 20 minutes and 58.6520 seconds to travel from Comet C/2019 U6 (Lemmon) and arrive to us.

20 minutes and 58.6520 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 0.826971 Astronomical Units, or 123,713,170 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 17.78.


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

Today's Comet C/2019 U6 (Lemmon) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 66.9°
Max altitude: 61.6°
Azimuth: 293.1°

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 06 March 2020 00:00 UTC (JD: 2458915.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99791860
Orbit inclination i 61.00144087°
Perihelion distance q 0.91427821 AU
136,774,073 km
Aphelion distance Q 877.60849951 AU
131,288,363,097 km
Semi-major axis a 439.26138886 AU
65,712,568,585 km
Orbital period period 9,206.4600 years
3,362,660.1132 days
Date of perihelion transit Tp 2020-Jun-18 19:42:10
2,459,019.3210 JD
Next perihelion transit 11227-Feb-11 22:25
5,821,679.4342 JD
Argument of perihelion peri 329.65744599504°
Longitude of the ascending node node 235.70610653647°
Mean anomaly M 359.98888512587°
Mean motion n 0.00010706°/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
2020 Oct 15 16h 56m 30s +23° 02’ 08” 17.51 Hercules
2020 Oct 16 16h 58m 41s +23° 02’ 16” 17.54 Hercules
2020 Oct 17 17h 00m 51s +23° 02’ 25” 17.58 Hercules
2020 Oct 18 17h 03m 01s +23° 02’ 36” 17.61 Hercules
2020 Oct 19 17h 05m 08s +23° 02’ 49” 17.65 Hercules
2020 Oct 20 17h 07m 18s +23° 03’ 06” 17.68 Hercules
2020 Oct 21 17h 09m 25s +23° 03’ 24” 17.71 Hercules
2020 Oct 22 17h 11m 34s +23° 03’ 43” 17.75 Hercules
2020 Oct 23 17h 13m 41s +23° 04’ 08” 17.78 Hercules
2020 Oct 24 17h 15m 47s +23° 04’ 33” 17.81 Hercules
2020 Oct 25 17h 17m 54s +23° 05’ 03” 17.85 Hercules
2020 Oct 26 17h 20m 00s +23° 05’ 35” 17.88 Hercules
2020 Oct 27 17h 22m 06s +23° 06’ 11” 17.91 Hercules
2020 Oct 28 17h 24m 11s +23° 06’ 50” 17.94 Hercules