Your Guide to the Solar System and the Night Sky
Donate now! You'll help cover server costs, enhance the site and keep it ad-free.
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:52  
clear_day Transit: 12:55  
SunsetSet: 20:59 south
wb_twilight Nautical TwilightWhat's Visible Now
Breakng! newly discovered Supernova 2023ixf in the Pinwheel Galaxy is the closest supernova observed in the latest decade. It can become bright enough to be visible by amateur astronomers. Check out information and detailed finder chart.
Comets » 

Comet 20D/Westphal (Lost)

Comet 20D/Westphal (Lost) is currently in the constellation of Centaurus.

The current Right Ascension of Comet 20D/Westphal (Lost) is 13h 59m 43s and the Declination is -54° 04’ 33” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current estimated magnitude of Comet 20D/Westphal (Lost) is 29.60 (JPL).

13h 59m 43s
-54° 04’ 33”

The observed values of Magnitude, Coma Diameter and Tail Length are derived from the most recent observation recorded at the Comet Observers Database. The value of Predicted Magnitude comes from the JPL Horizons ephemerides service and, in the case of comets, might be inaccurate given the highly dynamic and unpredictable behavior of these objects. When available, please refer to the Observed Magnitude value and consider the Predicted 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.

Today's rise, transit and set times of Comet 20D/Westphal (Lost) from Greenwich, United Kingdom edit_location_alt (all times relative to the local timezone Europe/London):

Today Comet 20D/Westphal (Lost) is not visible from Greenwich, United Kingdom edit_location_alt

  • 20D/Westphal (Lost) is below the horizon from Greenwich, United Kingdom edit_location_alt.
  • Given its current magnitude, 20D/Westphal (Lost) is visible only through long exposure photography.
  • 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.

Available Resources

Comet 20D/Westphal (Lost) Position and Finder Charts

Below we provide Comet 20D/Westphal (Lost) 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.

Finder chart of 20D/Westphal (Lost) in Centaurus on May,28 2023
Map showing Comet 20D/Westphal (Lost) in Centaurus on May, 28 2023
Field of view: 50x30 degrees
View fullscreen
Finder chart of 20D/Westphal (Lost)
Map showing Comet 20D/Westphal (Lost) in Centaurus on May, 28 2023
Field of view: 10x6 degrees
View fullscreen

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet 20D/Westphal (Lost) is right now. Click on the image to see a more detailed fullscreen tracker view.

20D/Westphal (Lost)
RA: 13h 59m 43s
Dec: -54° 04’ 33”
Deep sky finder chart for Comet 20D/Westphal (Lost)
Field of view: 60x40 arcmins
View fullscreen

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

Comet 20D/Westphal (Lost) Distance from Earth

The distance of Comet 20D/Westphal (Lost) from Earth is currently 3,567,935,564 kilometers, equivalent to 23.850176 Astronomical Units. Light takes 3 hours, 18 minutes and 21.3520 seconds to travel from Comet 20D/Westphal (Lost) and arrive to us.

3 hours, 18 minutes and 21.3520 seconds

The following chart shows the distance of Comet 20D/Westphal (Lost) 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.

Chart of the distance of Comet 20D/Westphal (Lost) from Earth in Astronomical Units (au)

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 (Lost) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach of Comet 20D/Westphal (Lost) to Earth

Between 1 January 2013 and 30 December 2100, the closest approach of Comet 20D/Westphal (Lost) to Earth happens on Wed Apr 18 2096 at a distance of 2.068993 Astronomical Units, or 309,516,955 kilometers:

Wed Apr 18 2096

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

Comet 20D/Westphal (Lost) Brightness and Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 20D/Westphal (Lost), 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.

Chart of the magnitude of Comet 20D/Westphal (Lost) as a function of time

Comet 20D/Westphal (Lost) Orbital Elements

The following table lists the orbital elements of Comet 20D/Westphal (Lost) 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 61.8661 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 (Lost) Orbit

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

Comet 20D/Westphal (Lost) 15 Days Ephemeris

The following table lists the ephemerides of Comet 20D/Westphal (Lost) 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 (Lost) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2023 May 21 14h 01m 14s -54° 13’ 20” 29.60 Centaurus
2023 May 22 14h 01m 01s -54° 12’ 11” 29.60 Centaurus
2023 May 23 14h 00m 48s -54° 10’ 58” 29.60 Centaurus
2023 May 24 14h 00m 35s -54° 09’ 45” 29.60 Centaurus
2023 May 25 14h 00m 23s -54° 08’ 30” 29.60 Centaurus
2023 May 26 14h 00m 10s -54° 07’ 14” 29.60 Centaurus
2023 May 27 13h 59m 57s -54° 05’ 57” 29.60 Centaurus
2023 May 28 13h 59m 44s -54° 04’ 40” 29.60 Centaurus
2023 May 29 13h 59m 32s -54° 03’ 20” 29.60 Centaurus
2023 May 30 13h 59m 21s -54° 01’ 59” 29.60 Centaurus
2023 May 31 13h 59m 08s -54° 00’ 38” 29.60 Centaurus
2023 Jun 01 13h 58m 56s -53° 59’ 17” 29.60 Centaurus
2023 Jun 02 13h 58m 45s -53° 57’ 54” 29.60 Centaurus
2023 Jun 03 13h 58m 33s -53° 56’ 30” 29.60 Centaurus