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🌎 Location: Greenwich, United Kingdom [change]

Comet 185P/Petriew

Comet 185P/Petriew is currently in the constellation of Libra. The current Right Ascension of Comet 185P/Petriew is 15h 14m 50s and the Declination is -16° 30’ 36” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 185P/Petriew is 24.24 (JPL).

Summary of key facts about Comet 185P/Petriew [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 14m 50s
-16° 30’ 36”

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Additional information about Comet 185P/Petriew available on TheSkyLive:

Available Resources

Comet 185P/Petriew Position and Finder Charts

Below we provide Comet 185P/Petriew 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 185P/Petriew in Libra on January, 26 2021
Field of view: 50x30 degrees
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Map showing Comet 185P/Petriew in Libra on January, 26 2021
Field of view: 10x6 degrees
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 = 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 185P/Petriew is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 15h 14m 50s
Dec: -16° 30’ 36”
Deep sky finder chart for Comet 185P/Petriew
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 185P/Petriew?, a page that provides all the information needed to find Comet 185P/Petriew in the sky and additional links to sky charts.

Comet 185P/Petriew Distance from Earth

The distance of Comet 185P/Petriew from Earth is currently 805,328,390 kilometers, equivalent to 5.383288 Astronomical Units. Light takes 44 minutes and 46.2864 seconds to travel from Comet 185P/Petriew and arrive to us.

44 minutes and 46.2864 seconds

The following chart shows the distance of Comet 185P/Petriew 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 185P/Petriew 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 185P/Petriew from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 185P/Petriew to Earth

Between January 2013 and December 2100, the closest approach of Comet 185P/Petriew to Earth happens on Tue Nov 7 2056 at a distance of 0.281732 Astronomical Units, or 42,146,482 kilometers:

Tue Nov 7 2056

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

Comet 185P/Petriew brightness

The current visual magnitude of Comet 185P/Petriew is 24.24.


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 185P/Petriew, 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 185P/Petriew between January 2013 and December 2100

Comet 185P/Petriew 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 185P/Petriew rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 106.5°
Max altitude: 22.0°
Azimuth: 253.5°

The rise and set times are defined as the time at which the upper limb of Comet 185P/Petriew 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 185P/Petriew Orbital Elements

The following table lists the orbital elements of Comet 185P/Petriew at epoch 29 June 2013 00:00 UTC (JD: 2456473.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.69933460
Orbit inclination i 14.00710281°
Perihelion distance q 0.93197571 AU
139,421,582 km
Aphelion distance Q 5.26744537 AU
787,998,613 km
Semi-major axis a 3.09971054 AU
463,710,097 km
Orbital period period 5.4600 years
1,993.3343 days
Date of perihelion transit Tp 2012-Aug-13 13:13:58
2,456,153.0514 JD
Next perihelion transit 2018-Jan-27 21:15
2,458,146.3857 JD
Argument of perihelion peri 181.93919392608°
Longitude of the ascending node node 214.09125498944°
Mean anomaly M 57.873637850864°
Mean motion n 0.18060192°/day

Visualization of Comet 185P/Petriew Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 185P/Petriew with respect of the Sun and the orbits of the major planets. The position of Comet 185P/Petriew 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 185P/Petriew
View Comet 185P/Petriew in the 3D Solar System Simulator

Comet 185P/Petriew 15 Days Ephemeris

The following table lists the ephemerides of Comet 185P/Petriew computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 185P/Petriew in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 19 15h 11m 42s -16° 25’ 01” 24.29 Libra
2021 Jan 20 15h 12m 07s -16° 25’ 54” 24.29 Libra
2021 Jan 21 15h 12m 34s -16° 26’ 45” 24.28 Libra
2021 Jan 22 15h 13m 00s -16° 27’ 33” 24.27 Libra
2021 Jan 23 15h 13m 26s -16° 28’ 18” 24.27 Libra
2021 Jan 24 15h 13m 50s -16° 29’ 00” 24.26 Libra
2021 Jan 25 15h 14m 13s -16° 29’ 39” 24.25 Libra
2021 Jan 26 15h 14m 38s -16° 30’ 16” 24.24 Libra
2021 Jan 27 15h 15m 01s -16° 30’ 50” 24.24 Libra
2021 Jan 28 15h 15m 23s -16° 31’ 19” 24.23 Libra
2021 Jan 29 15h 15m 44s -16° 31’ 48” 24.22 Libra
2021 Jan 30 15h 16m 05s -16° 32’ 12” 24.21 Libra
2021 Jan 31 15h 16m 26s -16° 32’ 33” 24.21 Libra
2021 Feb 01 15h 16m 45s -16° 32’ 52” 24.20 Libra