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🌎 Location: Greenwich, United Kingdom [change]

Comet 11P/Tempel-Swift-LINEAR

Comet 11P/Tempel-Swift-LINEAR is currently in the constellation of Pegasus. The current Right Ascension of Comet 11P/Tempel-Swift-LINEAR is 23h 45m 53s and the Declination is +23° 28’ 55” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 11P/Tempel-Swift-LINEAR is 17.34 (JPL) while the latest observed magnitude is 16.2 (COBS).

Summary of key facts about Comet 11P/Tempel-Swift-LINEAR [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 45m 53s
+23° 28’ 55”

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Additional information about Comet 11P/Tempel-Swift-LINEAR available on TheSkyLive:

Available Resources

Comet 11P/Tempel-Swift-LINEAR Position and Finder Charts

Below we provide Comet 11P/Tempel-Swift-LINEAR 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 11P/Tempel-Swift-LINEAR in Pegasus on October, 29 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 11P/Tempel-Swift-LINEAR in Pegasus on October, 29 2020
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 11P/Tempel-Swift-LINEAR is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 23h 45m 53s
Dec: +23° 28’ 55”
Deep sky finder chart for Comet 11P/Tempel-Swift-LINEAR
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 11P/Tempel-Swift-LINEAR?, a page that provides all the information needed to find Comet 11P/Tempel-Swift-LINEAR in the sky and additional links to sky charts.

Comet 11P/Tempel-Swift-LINEAR Distance from Earth

The distance of Comet 11P/Tempel-Swift-LINEAR from Earth is currently 74,217,943 kilometers, equivalent to 0.496116 Astronomical Units. Light takes 4 minutes and 7.5644 seconds to travel from Comet 11P/Tempel-Swift-LINEAR and arrive to us.

4 minutes and 7.5644 seconds

The following chart shows the distance of Comet 11P/Tempel-Swift-LINEAR 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 11P/Tempel-Swift-LINEAR 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 11P/Tempel-Swift-LINEAR from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 11P/Tempel-Swift-LINEAR to Earth

Between January 2013 and December 2100, the closest approach of Comet 11P/Tempel-Swift-LINEAR to Earth happens on Thu Nov 12 2026 at a distance of 0.401229 Astronomical Units, or 60,023,030 kilometers:

Thu Nov 12 2026

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

Comet 11P/Tempel-Swift-LINEAR brightness

The current visual magnitude of Comet 11P/Tempel-Swift-LINEAR is 17.34.


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 11P/Tempel-Swift-LINEAR, 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 11P/Tempel-Swift-LINEAR between January 2013 and December 2100

Comet 11P/Tempel-Swift-LINEAR 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 11P/Tempel-Swift-LINEAR rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 66.6°
Max altitude: 61.8°
Azimuth: 293.5°

The rise and set times are defined as the time at which the upper limb of Comet 11P/Tempel-Swift-LINEAR 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 11P/Tempel-Swift-LINEAR Orbital Elements

The following table lists the orbital elements of Comet 11P/Tempel-Swift-LINEAR at epoch 11 January 2018 00:00 UTC (JD: 2458130.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.55698465
Orbit inclination i 14.01808328°
Perihelion distance q 1.50044477 AU
224,463,344 km
Aphelion distance Q 5.27333750 AU
788,880,063 km
Semi-major axis a 3.38689114 AU
506,671,704 km
Orbital period period 6.2300 years
2,276.6710 days
Date of perihelion transit Tp 2020-Nov-28 18:09:09
2,459,182.2564 JD
Argument of perihelion peri 164.73824540448°
Longitude of the ascending node node 239.38969900916°
Mean anomaly M 193.69038278757°
Mean motion n 0.15812561°/day

Visualization of Comet 11P/Tempel-Swift-LINEAR Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 11P/Tempel-Swift-LINEAR with respect of the Sun and the orbits of the major planets. The position of Comet 11P/Tempel-Swift-LINEAR 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 11P/Tempel-Swift-LINEAR
View Comet 11P/Tempel-Swift-LINEAR in the 3D Solar System Simulator

Comet 11P/Tempel-Swift-LINEAR 15 Days Ephemeris

The following table lists the ephemerides of Comet 11P/Tempel-Swift-LINEAR computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 11P/Tempel-Swift-LINEAR in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Oct 22 23h 38m 12s +26° 09’ 51” 17.45 Pegasus
2020 Oct 23 23h 39m 06s +25° 48’ 46” 17.43 Pegasus
2020 Oct 24 23h 40m 03s +25° 27’ 15” 17.41 Pegasus
2020 Oct 25 23h 41m 03s +25° 05’ 23” 17.40 Pegasus
2020 Oct 26 23h 42m 06s +24° 43’ 11” 17.38 Pegasus
2020 Oct 27 23h 43m 13s +24° 20’ 39” 17.37 Pegasus
2020 Oct 28 23h 44m 22s +23° 57’ 51” 17.35 Pegasus
2020 Oct 29 23h 45m 36s +23° 34’ 45” 17.34 Pegasus
2020 Oct 30 23h 46m 53s +23° 11’ 26” 17.33 Pegasus
2020 Oct 31 23h 48m 12s +22° 47’ 54” 17.32 Pegasus
2020 Nov 01 23h 49m 36s +22° 24’ 12” 17.31 Pegasus
2020 Nov 02 23h 51m 02s +22° 00’ 20” 17.30 Pegasus
2020 Nov 03 23h 52m 31s +21° 36’ 20” 17.30 Pegasus
2020 Nov 04 23h 54m 03s +21° 12’ 15” 17.29 Pegasus