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🌎  Greenwich, United Kingdom [change]

Comet 9P/Tempel 1

Comet 9P/Tempel 1 is currently in the constellation of Aquarius. The current Right Ascension of Comet 9P/Tempel 1 is 23h 47m 03s and the Declination is -09° 51’ 35” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 9P/Tempel 1 is 20.12 (JPL).

Summary of key facts about Comet 9P/Tempel 1 [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]:

23h 47m 03s
-09° 51’ 35”
  • 9P/Tempel 1 is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South direction at an altitude of 29° above the horizon.
  • Given its current magnitude, 9P/Tempel 1 is visible only through long exposure photography.
  • See also 9P/Tempel 1 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 9P/Tempel 1 available on TheSkyLive:

Available Resources

Comet 9P/Tempel 1 Position and Finder Charts

Below we provide Comet 9P/Tempel 1 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 9P/Tempel 1 in Aquarius on January, 27 2023
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 9P/Tempel 1 in Aquarius on January, 27 2023
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 9P/Tempel 1 is right now. Click on the image to see a more detailed fullscreen tracker view.

9P/Tempel 1
RA: 23h 47m 03s
Dec: -09° 51’ 35”
Deep sky finder chart for Comet 9P/Tempel 1
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 9P/Tempel 1?, a page that provides all the information needed to find Comet 9P/Tempel 1 in the sky and additional links to sky charts.

Comet 9P/Tempel 1 Distance from Earth

The distance of Comet 9P/Tempel 1 from Earth is currently 547,742,477 kilometers, equivalent to 3.661432 Astronomical Units. Light takes 30 minutes and 27.0722 seconds to travel from Comet 9P/Tempel 1 and arrive to us.

30 minutes and 27.0722 seconds

The following chart shows the distance of Comet 9P/Tempel 1 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 9P/Tempel 1 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 9P/Tempel 1 from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 9P/Tempel 1 to Earth

Between January 2013 and December 2100, the closest approach of Comet 9P/Tempel 1 to Earth happens on Sat Jun 16 2040 at a distance of 0.946207 Astronomical Units, or 141,550,499 kilometers:

Sat Jun 16 2040

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

Comet 9P/Tempel 1 brightness

The current visual magnitude of Comet 9P/Tempel 1 is 20.12.


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 9P/Tempel 1, 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 9P/Tempel 1 between January 2013 and December 2100

Comet 9P/Tempel 1 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 9P/Tempel 1 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 99.9°
Max altitude: 28.7°
Azimuth: 260.2°

The rise and set times are defined as the time at which the upper limb of Comet 9P/Tempel 1 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 9P/Tempel 1 Orbital Elements

The following table lists the orbital elements of Comet 9P/Tempel 1 at epoch 24 December 2015 00:00 UTC (JD: 2457381.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.50981218
Orbit inclination i 10.47330197°
Perihelion distance q 1.54239348 AU
230,738,781 km
Aphelion distance Q 4.75067788 AU
710,691,296 km
Semi-major axis a 3.14653568 AU
470,715,039 km
Orbital period period 5.5816 years
2,038.6723 days
Date of perihelion transit Tp 2016-Aug-02 13:25:35
2,457,603.0594 JD
Next perihelion transit 2022-Mar-03 05:33
2,459,641.7317 JD
Argument of perihelion peri 179.18782584718°
Longitude of the ascending node node 68.766701809392°
Mean anomaly M 320.87581259496°
Mean motion n 0.17658552°/day

Visualization of Comet 9P/Tempel 1 Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 9P/Tempel 1 with respect of the Sun and the orbits of the major planets. The position of Comet 9P/Tempel 1 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 9P/Tempel 1
View Comet 9P/Tempel 1 in the 3D Solar System Simulator

Comet 9P/Tempel 1 15 Days Ephemeris

The following table lists the ephemerides of Comet 9P/Tempel 1 computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 9P/Tempel 1 in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2023 Jan 20 23h 37m 54s -11° 07’ 02” 20.00 Aquarius
2023 Jan 21 23h 39m 06s -10° 57’ 09” 20.01 Aquarius
2023 Jan 22 23h 40m 18s -10° 47’ 14” 20.03 Aquarius
2023 Jan 23 23h 41m 30s -10° 37’ 21” 20.05 Aquarius
2023 Jan 24 23h 42m 41s -10° 27’ 28” 20.06 Aquarius
2023 Jan 25 23h 43m 53s -10° 17’ 35” 20.08 Aquarius
2023 Jan 26 23h 45m 05s -10° 07’ 44” 20.10 Aquarius
2023 Jan 27 23h 46m 17s -09° 57’ 51” 20.11 Aquarius
2023 Jan 28 23h 47m 29s -09° 48’ 02” 20.13 Aquarius
2023 Jan 29 23h 48m 42s -09° 38’ 12” 20.14 Aquarius
2023 Jan 30 23h 49m 54s -09° 28’ 23” 20.16 Aquarius
2023 Jan 31 23h 51m 06s -09° 18’ 33” 20.17 Aquarius
2023 Feb 01 23h 52m 18s -09° 08’ 47” 20.19 Aquarius
2023 Feb 02 23h 53m 30s -08° 58’ 59” 20.20 Aquarius