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🌎 Location: Greenwich, United Kingdom [change]

Comet C/2018 W1 (Catalina)

Comet C/2018 W1 (Catalina) is currently in the constellation of Libra. The current Right Ascension of Comet C/2018 W1 (Catalina) is 15h 01m 40s and the Declination is -03° 10’ 15” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2018 W1 (Catalina) is 25.00 (JPL).

Summary of key facts about Comet C/2018 W1 (Catalina) [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]:

15h 01m 40s
-03° 10’ 15”
Libra
25.00
  • C/2018 W1 (Catalina) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South-South-West direction at an altitude of 33° above the horizon.
  • Given its current magnitude, C/2018 W1 (Catalina) is visible only through long exposure photography.
  • See also C/2018 W1 (Catalina) 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/2018 W1 (Catalina) available on TheSkyLive:

Available Resources

Comet C/2018 W1 (Catalina) Position and Finder Charts

Below we provide Comet C/2018 W1 (Catalina) 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/2018 W1 (Catalina) in Libra on August, 12 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2018 W1 (Catalina) in Libra on August, 12 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/2018 W1 (Catalina) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2018 W1 (Catalina)
RA: 15h 01m 40s
Dec: -03° 10’ 15”
Deep sky finder chart for Comet C/2018 W1 (Catalina)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2018 W1 (Catalina)?, a page that provides all the information needed to find Comet C/2018 W1 (Catalina) in the sky and additional links to sky charts.

Comet C/2018 W1 (Catalina) Distance from Earth

The distance of Comet C/2018 W1 (Catalina) from Earth is currently 791,732,741 kilometers, equivalent to 5.292406 Astronomical Units. Light takes 44 minutes and 0.9362 seconds to travel from Comet C/2018 W1 (Catalina) and arrive to us.

791,732,741
5.292406
44 minutes and 0.9362 seconds

The following chart shows the distance of Comet C/2018 W1 (Catalina) 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/2018 W1 (Catalina) 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/2018 W1 (Catalina) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2018 W1 (Catalina) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2018 W1 (Catalina) to Earth happens on Tue Dec 11 2018 at a distance of 1.65146468 Astronomical Units, or 247,055,601 kilometers:

Tue Dec 11 2018
247,055,601
1.651465

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

Comet C/2018 W1 (Catalina) brightness

The current visual magnitude of Comet C/2018 W1 (Catalina) is 25.00.

25.00
-
-

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/2018 W1 (Catalina), 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/2018 W1 (Catalina) between January 2013 and December 2100

Comet C/2018 W1 (Catalina) 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/2018 W1 (Catalina) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 93.2°
Max altitude: 35.3°
Azimuth: 266.8°

The rise and set times are defined as the time at which the upper limb of Comet C/2018 W1 (Catalina) 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/2018 W1 (Catalina) Orbital Elements

The following table lists the orbital elements of Comet C/2018 W1 (Catalina) at epoch 26 January 2019 00:00 UTC (JD: 2458510.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.93766275
Orbit inclination i 83.27888375°
Perihelion distance q 1.36017720 AU
203,479,613 km
Aphelion distance Q 42.27913300 AU
6,324,868,285 km
Semi-major axis a 21.81965510 AU
3,264,173,949 km
Orbital period period 101.9200 years
37,228.0466 days
Date of perihelion transit Tp 2019-May-11 20:28:13
2,458,615.3529 JD
Next perihelion transit 2121-Apr-14 21:35
2,495,843.3996 JD
Argument of perihelion peri 251.2480607503°
Longitude of the ascending node node 233.58957638292°
Mean anomaly M 358.98605860217°
Mean motion n 0.00967013°/day

Visualization of Comet C/2018 W1 (Catalina) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 W1 (Catalina) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 W1 (Catalina) 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/2018 W1 (Catalina)
View Comet C/2018 W1 (Catalina) in the 3D Solar System Simulator

Comet C/2018 W1 (Catalina) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2018 W1 (Catalina) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2018 W1 (Catalina) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Aug 05 15h 00m 33s -03° 12’ 48” 25.00 Libra
2020 Aug 06 15h 00m 39s -03° 12’ 16” 25.00 Libra
2020 Aug 07 15h 00m 47s -03° 11’ 48” 25.00 Libra
2020 Aug 08 15h 00m 55s -03° 11’ 25” 25.00 Libra
2020 Aug 09 15h 01m 03s -03° 11’ 03” 25.00 Libra
2020 Aug 10 15h 01m 11s -03° 10’ 46” 25.00 Libra
2020 Aug 11 15h 01m 22s -03° 10’ 32” 25.00 Libra
2020 Aug 12 15h 01m 32s -03° 10’ 20” 25.00 Libra
2020 Aug 13 15h 01m 42s -03° 10’ 13” 25.00 Libra
2020 Aug 14 15h 01m 54s -03° 10’ 06” 25.00 Libra
2020 Aug 15 15h 02m 07s -03° 10’ 05” 25.00 Libra
2020 Aug 16 15h 02m 18s -03° 10’ 05” 25.00 Libra
2020 Aug 17 15h 02m 33s -03° 10’ 09” 25.00 Libra
2020 Aug 18 15h 02m 45s -03° 10’ 14” 25.00 Libra