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Comet 164P/Christensen

Comet 164P/Christensen is currently in the constellation of Libra. The current Right Ascension of Comet 164P/Christensen is 15h 03m 56s and the Declination is -02° 55’ 39” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 164P/Christensen is 20.93 (JPL).

Summary of key facts about Comet 164P/Christensen [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 03m 56s
-02° 55’ 39”
  • 164P/Christensen is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South-South-East direction at an altitude of 35° above the horizon.
  • Given its current magnitude, 164P/Christensen is visible only through long exposure photography.
  • See also 164P/Christensen rise and set times.
  • 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.

Additional information about Comet 164P/Christensen available on TheSkyLive:

Available Resources

Comet 164P/Christensen Position and Finder Charts

Below we provide Comet 164P/Christensen 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 164P/Christensen in Libra on May, 07 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 164P/Christensen in Libra on May, 07 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 164P/Christensen is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 15h 03m 56s
Dec: -02° 55’ 39”
Deep sky finder chart for Comet 164P/Christensen
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 164P/Christensen?, a page that provides all the information needed to find Comet 164P/Christensen in the sky and additional links to sky charts.

Comet 164P/Christensen Distance from Earth

The distance of Comet 164P/Christensen from Earth is currently 679,405,273 kilometers, equivalent to 4.541544 Astronomical Units. Light takes 37 minutes and 46.2521 seconds to travel from Comet 164P/Christensen and arrive to us.

37 minutes and 46.2521 seconds

The following chart shows the distance of Comet 164P/Christensen 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 164P/Christensen 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 164P/Christensen from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 164P/Christensen to Earth

Between January 2013 and December 2100, the closest approach of Comet 164P/Christensen to Earth happens on Tue Dec 4 2074 at a distance of 0.812188 Astronomical Units, or 121,501,626 kilometers:

Tue Dec 4 2074

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

Comet 164P/Christensen brightness

The current visual magnitude of Comet 164P/Christensen is 20.93.


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 164P/Christensen, 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 164P/Christensen between January 2013 and December 2100

Comet 164P/Christensen 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 164P/Christensen rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 92.9°
Max altitude: 35.6°
Azimuth: 267.1°

The rise and set times are defined as the time at which the upper limb of Comet 164P/Christensen 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 164P/Christensen Orbital Elements

The following table lists the orbital elements of Comet 164P/Christensen at epoch 10 December 2014 00:00 UTC (JD: 2457002.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.54028603
Orbit inclination i 16.26201829°
Perihelion distance q 1.68145002 AU
251,541,342 km
Aphelion distance Q 5.63375092 AU
842,797,143 km
Semi-major axis a 3.65760047 AU
547,169,243 km
Orbital period period 7.0000 years
2,555.0113 days
Date of perihelion transit Tp 2018-May-30 21:53:37
2,458,269.4122 JD
Next perihelion transit 2025-May-28 22:09
2,460,824.4235 JD
Argument of perihelion peri 326.00391345373°
Longitude of the ascending node node 88.30743483611°
Mean anomaly M 181.49260663498°
Mean motion n 0.14089957°/day

Visualization of Comet 164P/Christensen Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 164P/Christensen with respect of the Sun and the orbits of the major planets. The position of Comet 164P/Christensen 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 164P/Christensen
View Comet 164P/Christensen in the 3D Solar System Simulator

Comet 164P/Christensen 15 Days Ephemeris

The following table lists the ephemerides of Comet 164P/Christensen computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 164P/Christensen in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Apr 30 15h 08m 43s -03° 11’ 02” 20.92 Libra
2021 May 01 15h 08m 08s -03° 08’ 57” 20.92 Libra
2021 May 02 15h 07m 32s -03° 06’ 54” 20.92 Libra
2021 May 03 15h 06m 56s -03° 04’ 53” 20.92 Libra
2021 May 04 15h 06m 20s -03° 02’ 56” 20.92 Libra
2021 May 05 15h 05m 44s -03° 01’ 00” 20.92 Libra
2021 May 06 15h 05m 07s -02° 59’ 08” 20.93 Libra
2021 May 07 15h 04m 31s -02° 57’ 20” 20.93 Libra
2021 May 08 15h 03m 55s -02° 55’ 33” 20.93 Libra
2021 May 09 15h 03m 19s -02° 53’ 52” 20.93 Libra
2021 May 10 15h 02m 41s -02° 52’ 12” 20.93 Libra
2021 May 11 15h 02m 06s -02° 50’ 35” 20.93 Libra
2021 May 12 15h 01m 30s -02° 49’ 04” 20.93 Libra
2021 May 13 15h 00m 54s -02° 47’ 35” 20.93 Libra