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Comet 20D/Westphal

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Comet 20D/Westphal Position

Comet 20D/Westphal is currently in the constellation of Centaurus. The current Right Ascension is 13h 53m 17s and the Declination is -49° 38’ 04”.

13h 53m 17s
-49° 38’ 04”

Simplified sky chart showing where Comet 20D/Westphal is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Comet 20D/Westphal in Centaurus on October, 21 2019
Field of view: 60x30 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]

Hihgher precision deep sky finder chart showing where Comet 20D/Westphal is right now (view fullscreen)

RA: 13h 53m 17s
Dec: -49° 38’ 04”
Deep sky finder chart for Comet 20D/Westphal
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 20D/Westphal?, a page that provides all the information needed to find Comet 20D/Westphal in the sky and additional links to sky charts.

Comet 20D/Westphal Distance

The distance of Comet 20D/Westphal from Earth is currently 4,140,209,549 kilometers, equivalent to 27.675591 Astronomical Units. Light takes 3 hours, 50 minutes and 10.2525 seconds to travel from Comet 20D/Westphal and arrive to us.

3 hours, 50 minutes and 10.2525 seconds

The following chart shows the distance of Comet 20D/Westphal 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 20D/Westphal 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 20D/Westphal from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 20D/Westphal to Earth

Between January 2013 and December 2100 the closest approach of Comet 20D/Westphal to Earth happens on Wed Apr 18 2096 at a distance of 2.06898637 Astronomical Units, or 309,515,957 kilometers:

Wed Apr 18 2096

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

Comet 20D/Westphal brightness

The current visual magnitude of Comet 20D/Westphal is 30.31.


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 behvior 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 20D/Westphal, 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 20D/Westphal between January 2013 and December 2100

Comet 20D/Westphal rise and set times

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

Comet 20D/Westphal is currently not visible from Greenwich, United Kingdom [change]

The rise and set times are defined as the time at which the upper limb of Comet 20D/Westphal touches the horizon, consideting the effect of the atmospheric refraction. As the atmoshpere conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet 20D/Westphal Orbital Elements

The following table lists the orbital elements of Comet 20D/Westphal at epoch 01 January 1970 00:00 UTC (JD: 2420080.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.91983119
Orbit inclination i 40.89006106°
Perihelion distance q 1.25401276 AU
187,597,639 km
Aphelion distance Q 30.03029210 AU
4,492,467,764 km
Semi-major axis a 15.64215243 AU
2,340,032,701 km
Orbital period period 61.8700 years
22,596.6052 days
Date of perihelion transit Tp 1913-Nov-26 18:57:58
2,420,098.2903 JD
Next perihelion transit 1975-Oct-09 09:29
2,442,694.8954 JD
Argument of perihelion peri 57.08095497142°
Longitude of the ascending node node 348.00644693114°
Mean anomaly M 359.71657281861°
Mean motion n 0.01593160°/day

Visualization of Comet 20D/Westphal Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 20D/Westphal with respect of the Sun and the orbits of the major planets. The position of Comet 20D/Westphal 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 20D/Westphal
View Comet 20D/Westphal in the 3D Solar System Simulator

Comet 20D/Westphal 15 Days Ephemeris

The following table lists the ephemerides of Comet 20D/Westphal computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 20D/Westphal in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Oct 14 13h 51m 45s -49° 34’ 10” 30.31 Centaurus
2019 Oct 15 13h 51m 57s -49° 34’ 40” 30.31 Centaurus
2019 Oct 16 13h 52m 09s -49° 35’ 09” 30.31 Centaurus
2019 Oct 17 13h 52m 23s -49° 35’ 40” 30.31 Centaurus
2019 Oct 18 13h 52m 36s -49° 36’ 14” 30.31 Centaurus
2019 Oct 19 13h 52m 49s -49° 36’ 47” 30.31 Centaurus
2019 Oct 20 13h 53m 02s -49° 37’ 22” 30.31 Centaurus
2019 Oct 21 13h 53m 14s -49° 37’ 59” 30.31 Centaurus
2019 Oct 22 13h 53m 27s -49° 38’ 36” 30.31 Centaurus
2019 Oct 23 13h 53m 40s -49° 39’ 15” 30.31 Centaurus
2019 Oct 24 13h 53m 53s -49° 39’ 56” 30.31 Centaurus
2019 Oct 25 13h 54m 06s -49° 40’ 37” 30.31 Centaurus
2019 Oct 26 13h 54m 20s -49° 41’ 21” 30.31 Centaurus
2019 Oct 27 13h 54m 33s -49° 42’ 05” 30.31 Centaurus