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Comet 8P/Tuttle

Comet 8P/Tuttle is currently in the constellation of Cygnus. The current Right Ascension of Comet 8P/Tuttle is 19h 58m 18s and the Declination is +41° 10’ 39” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 8P/Tuttle is 20.91 (JPL).

Summary of key facts about Comet 8P/Tuttle [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 58m 18s
+41° 10’ 39”
  • 8P/Tuttle is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the East-North-East direction at an altitude of 41° above the horizon.
  • Given its current magnitude, 8P/Tuttle is visible only through long exposure photography.
  • See also 8P/Tuttle 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 8P/Tuttle available on TheSkyLive:

Available Resources

Comet 8P/Tuttle Position and Finder Charts

Below we provide Comet 8P/Tuttle 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 8P/Tuttle in Cygnus on October, 28 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 8P/Tuttle in Cygnus on October, 28 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 8P/Tuttle is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 19h 58m 18s
Dec: +41° 10’ 39”
Deep sky finder chart for Comet 8P/Tuttle
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 8P/Tuttle?, a page that provides all the information needed to find Comet 8P/Tuttle in the sky and additional links to sky charts.

Comet 8P/Tuttle Distance from Earth

The distance of Comet 8P/Tuttle from Earth is currently 513,260,676 kilometers, equivalent to 3.430936 Astronomical Units. Light takes 28 minutes and 32.0533 seconds to travel from Comet 8P/Tuttle and arrive to us.

28 minutes and 32.0533 seconds

The following chart shows the distance of Comet 8P/Tuttle 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 8P/Tuttle 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 8P/Tuttle from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 8P/Tuttle to Earth

Between January 2013 and December 2100, the closest approach of Comet 8P/Tuttle to Earth happens on Mon Dec 28 2048 at a distance of 0.175548 Astronomical Units, or 26,261,576 kilometers:

Mon Dec 28 2048

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

Comet 8P/Tuttle brightness

The current visual magnitude of Comet 8P/Tuttle is 20.91.


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 8P/Tuttle, 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 8P/Tuttle between January 2013 and December 2100

Comet 8P/Tuttle rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Comet 8P/Tuttle is circumpolar and transits at 17:28 UTC (altitude: 79.7°)

The rise and set times are defined as the time at which the upper limb of Comet 8P/Tuttle 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 8P/Tuttle Orbital Elements

The following table lists the orbital elements of Comet 8P/Tuttle at epoch 01 December 2007 00:00 UTC (JD: 2454436.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.81982108
Orbit inclination i 54.98320551°
Perihelion distance q 1.02712938 AU
153,656,369 km
Aphelion distance Q 10.37408627 AU
1,551,941,219 km
Semi-major axis a 5.70060782 AU
852,798,794 km
Orbital period period 13.6100 years
4,971.4168 days
Date of perihelion transit Tp 2008-Jan-27 00:34:19
2,454,492.5238 JD
Next perihelion transit 2021-Sep-06 10:34
2,459,463.9406 JD
Argument of perihelion peri 207.50752270447°
Longitude of the ascending node node 270.34165048967°
Mean anomaly M 355.94309172005°
Mean motion n 0.07241396°/day

Visualization of Comet 8P/Tuttle Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 8P/Tuttle with respect of the Sun and the orbits of the major planets. The position of Comet 8P/Tuttle 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!

Comet 8P/Tuttle 15 Days Ephemeris

The following table lists the ephemerides of Comet 8P/Tuttle computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 8P/Tuttle in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Oct 21 19h 56m 35s +42° 26’ 39” 20.99 Cygnus
2020 Oct 22 19h 56m 44s +42° 16’ 27” 20.98 Cygnus
2020 Oct 23 19h 56m 54s +42° 06’ 15” 20.97 Cygnus
2020 Oct 24 19h 57m 06s +41° 56’ 07” 20.96 Cygnus
2020 Oct 25 19h 57m 20s +41° 46’ 00” 20.95 Cygnus
2020 Oct 26 19h 57m 33s +41° 35’ 56” 20.94 Cygnus
2020 Oct 27 19h 57m 51s +41° 25’ 54” 20.93 Cygnus
2020 Oct 28 19h 58m 08s +41° 15’ 56” 20.92 Cygnus
2020 Oct 29 19h 58m 27s +41° 06’ 01” 20.91 Cygnus
2020 Oct 30 19h 58m 48s +40° 56’ 08” 20.89 Cygnus
2020 Oct 31 19h 59m 08s +40° 46’ 21” 20.88 Cygnus
2020 Nov 01 19h 59m 32s +40° 36’ 37” 20.87 Cygnus
2020 Nov 02 19h 59m 57s +40° 26’ 57” 20.86 Cygnus
2020 Nov 03 20h 00m 23s +40° 17’ 21” 20.85 Cygnus