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🌎  Greenwich, United Kingdom [change]

Comet 6P/d'Arrest

Comet 6P/d'Arrest is currently in the constellation of Sagittarius. The current Right Ascension of Comet 6P/d'Arrest is 19h 51m 15s and the Declination is -31° 11’ 46” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 6P/d'Arrest is 17.13 (JPL).

Summary of key facts about Comet 6P/d'Arrest [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]:

19h 51m 15s
-31° 11’ 46”

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 6P/d'Arrest available on TheSkyLive:

Available Resources

Comet 6P/d'Arrest Position and Finder Charts

Below we provide Comet 6P/d'Arrest 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 6P/d'Arrest in Sagittarius on October, 18 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 6P/d'Arrest in Sagittarius on October, 18 2021
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 6P/d'Arrest is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 19h 51m 15s
Dec: -31° 11’ 46”
Deep sky finder chart for Comet 6P/d'Arrest
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 6P/d'Arrest?, a page that provides all the information needed to find Comet 6P/d'Arrest in the sky and additional links to sky charts.

Comet 6P/d'Arrest Distance from Earth

The distance of Comet 6P/d'Arrest from Earth is currently 149,986,372 kilometers, equivalent to 1.002597 Astronomical Units. Light takes 8 minutes and 20.3007 seconds to travel from Comet 6P/d'Arrest and arrive to us.

8 minutes and 20.3007 seconds

The following chart shows the distance of Comet 6P/d'Arrest 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 6P/d'Arrest 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 6P/d'Arrest from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 6P/d'Arrest to Earth

Between January 2013 and December 2100, the closest approach of Comet 6P/d'Arrest to Earth happens on Wed Aug 7 2047 at a distance of 0.317294 Astronomical Units, or 47,466,486 kilometers:

Wed Aug 7 2047

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

Comet 6P/d'Arrest brightness

The current visual magnitude of Comet 6P/d'Arrest is 17.13.


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 6P/d'Arrest, 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 6P/d'Arrest between January 2013 and December 2100

Comet 6P/d'Arrest 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 6P/d'Arrest rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 121.2°
Max altitude: 7.3°
Azimuth: 238.8°

The rise and set times are defined as the time at which the upper limb of Comet 6P/d'Arrest 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 6P/d'Arrest Orbital Elements

The following table lists the orbital elements of Comet 6P/d'Arrest at epoch 26 June 2015 00:00 UTC (JD: 2457200.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.61142218
Orbit inclination i 19.48170781°
Perihelion distance q 1.36145392 AU
203,670,608 km
Aphelion distance Q 5.64591420 AU
844,616,744 km
Semi-major axis a 3.50368406 AU
524,143,676 km
Orbital period period 6.5600 years
2,395.4430 days
Date of perihelion transit Tp 2015-Mar-02 10:00:25
2,457,083.9170 JD
Next perihelion transit 2021-Sep-21 20:38
2,459,479.3599 JD
Argument of perihelion peri 178.11492658416°
Longitude of the ascending node node 138.93370246416°
Mean anomaly M 17.520723706765°
Mean motion n 0.15028536°/day

Visualization of Comet 6P/d'Arrest Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 6P/d'Arrest with respect of the Sun and the orbits of the major planets. The position of Comet 6P/d'Arrest 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 6P/d'Arrest
View Comet 6P/d'Arrest in the 3D Solar System Simulator

Comet 6P/d'Arrest 15 Days Ephemeris

The following table lists the ephemerides of Comet 6P/d'Arrest computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 6P/d'Arrest in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Oct 11 19h 21m 45s -30° 00’ 34” 16.96 Sagittarius
2021 Oct 12 19h 25m 40s -30° 12’ 19” 16.98 Sagittarius
2021 Oct 13 19h 29m 35s -30° 23’ 21” 17.00 Sagittarius
2021 Oct 14 19h 33m 32s -30° 33’ 42” 17.02 Sagittarius
2021 Oct 15 19h 37m 27s -30° 43’ 22” 17.05 Sagittarius
2021 Oct 16 19h 41m 25s -30° 52’ 20” 17.07 Sagittarius
2021 Oct 17 19h 45m 23s -31° 00’ 38” 17.09 Sagittarius
2021 Oct 18 19h 49m 19s -31° 08’ 13” 17.12 Sagittarius
2021 Oct 19 19h 53m 17s -31° 15’ 10” 17.14 Sagittarius
2021 Oct 20 19h 57m 15s -31° 21’ 24” 17.17 Sagittarius
2021 Oct 21 20h 01m 14s -31° 26’ 59” 17.19 Sagittarius
2021 Oct 22 20h 05m 12s -31° 31’ 54” 17.22 Sagittarius
2021 Oct 23 20h 09m 08s -31° 36’ 10” 17.25 Sagittarius
2021 Oct 24 20h 13m 05s -31° 39’ 47” 17.27 Sagittarius