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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sleep NighttimeWhat's Visible Now?
Comets » 

Comet 51P/Harrington

Altitude: -0.7°   Azimuth: 52.4°   Direction: North-East

Comet 51P/Harrington is currently in the constellation of Cancer.

The current Right Ascension of Comet 51P/Harrington is 08h 47m 01s and the Declination is +21° 44’ 28” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current estimated magnitude of Comet 51P/Harrington is 24.22 (JPL).

08h 47m 01s
+21° 44’ 28”

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 51P/Harrington from Greenwich, United Kingdom edit_location_alt (all times relative to the local timezone Europe/London):

Azimuth: 68.3°
Max altitude: 60.2°
Azimuth: 291.7°
  • 51P/Harrington is below the horizon from Greenwich, United Kingdom edit_location_alt.
  • Given its current magnitude, 51P/Harrington 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 51P/Harrington Position and Finder Charts

Below we provide Comet 51P/Harrington 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 51P/Harrington in Cancer on December,11 2023
Map showing Comet 51P/Harrington in Cancer on December, 11 2023
Field of view: 50x30 degrees
View fullscreen
Finder chart of 51P/Harrington
Map showing Comet 51P/Harrington in Cancer on December, 11 2023
Field of view: 10x6 degrees
View fullscreen

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet 51P/Harrington is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 08h 47m 01s
Dec: +21° 44’ 28”
Deep sky finder chart for Comet 51P/Harrington
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 51P/Harrington?, a page that provides all the information needed to find Comet 51P/Harrington in the sky and additional links to sky charts.

Comet 51P/Harrington Distance from Earth

The distance of Comet 51P/Harrington from Earth is currently 454,376,858 kilometers, equivalent to 3.037322 Astronomical Units. Light takes 25 minutes and 15.6381 seconds to travel from Comet 51P/Harrington and arrive to us.

25 minutes and 15.6381 seconds

The following chart shows the distance of Comet 51P/Harrington 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 51P/Harrington 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 51P/Harrington from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach of Comet 51P/Harrington to Earth

Between 1 January 2013 and 30 December 2100, the closest approach of Comet 51P/Harrington to Earth happens on Mon Sep 5 2022 at a distance of 0.719952 Astronomical Units, or 107,703,295 kilometers:

Mon Sep 5 2022

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

Comet 51P/Harrington Brightness and Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 51P/Harrington, 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 51P/Harrington as a function of time

Comet 51P/Harrington 15 Days Ephemeris

The following table lists the ephemerides of Comet 51P/Harrington computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 51P/Harrington in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2023 Dec 04 08h 49m 23s +21° 23’ 27” 24.23 Cancer
2023 Dec 05 08h 49m 09s +21° 25’ 54” 24.23 Cancer
2023 Dec 06 08h 48m 53s +21° 28’ 26” 24.23 Cancer
2023 Dec 07 08h 48m 37s +21° 31’ 01” 24.23 Cancer
2023 Dec 08 08h 48m 20s +21° 33’ 42” 24.22 Cancer
2023 Dec 09 08h 48m 01s +21° 36’ 27” 24.22 Cancer
2023 Dec 10 08h 47m 40s +21° 39’ 15” 24.22 Cancer
2023 Dec 11 08h 47m 18s +21° 42’ 09” 24.22 Cancer
2023 Dec 12 08h 46m 57s +21° 45’ 06” 24.22 Cancer
2023 Dec 13 08h 46m 32s +21° 48’ 06” 24.21 Cancer
2023 Dec 14 08h 46m 08s +21° 51’ 11” 24.21 Cancer
2023 Dec 15 08h 45m 42s +21° 54’ 20” 24.21 Cancer
2023 Dec 16 08h 45m 15s +21° 57’ 32” 24.21 Cancer
2023 Dec 17 08h 44m 45s +22° 00’ 47” 24.21 Cancer