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Comet 109P/Swift-Tuttle

Available Resources

Comet 109P/Swift-Tuttle Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet 109P/Swift-Tuttle is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Comet 109P/Swift-Tuttle in Hydra on April, 21 2019
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
09h 34m 59s
-20° 56’ 48”

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 behvior 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.

Comet 109P/Swift-Tuttle Rise and Set Times

Today's Comet 109P/Swift-Tuttle rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 110.9°
Max altitude: 17.6°
Azimuth: 249.1°

Comet 109P/Swift-Tuttle Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 109P/Swift-Tuttle with respect of the Sun and the orbits of the major planets. The position of Comet 109P/Swift-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!

Orbit Diagram of Comet 109P/Swift-Tuttle
View Comet 109P/Swift-Tuttle in the 3D Solar System Simulator

Comet 109P/Swift-Tuttle Ephemeris

The following table lists the ephemerides of Comet 109P/Swift-Tuttle computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 109P/Swift-Tuttle in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Apr 14 09h 35m 20s -21° 04’ 55” 36.16 Hydra
2019 Apr 15 09h 35m 17s -21° 03’ 54” 36.16 Hydra
2019 Apr 16 09h 35m 13s -21° 02’ 50” 36.16 Hydra
2019 Apr 17 09h 35m 11s -21° 01’ 48” 36.16 Hydra
2019 Apr 18 09h 35m 08s -21° 00’ 46” 36.16 Hydra
2019 Apr 19 09h 35m 06s -20° 59’ 43” 36.16 Hydra
2019 Apr 20 09h 35m 03s -20° 58’ 41” 36.16 Hydra
2019 Apr 21 09h 35m 00s -20° 57’ 38” 36.17 Hydra
2019 Apr 22 09h 34m 59s -20° 56’ 35” 36.17 Hydra
2019 Apr 23 09h 34m 55s -20° 55’ 33” 36.17 Hydra
2019 Apr 24 09h 34m 54s -20° 54’ 32” 36.17 Hydra
2019 Apr 25 09h 34m 51s -20° 53’ 30” 36.17 Hydra
2019 Apr 26 09h 34m 50s -20° 52’ 28” 36.17 Hydra
2019 Apr 27 09h 34m 49s -20° 51’ 27” 36.17 Hydra

Distance of Comet 109P/Swift-Tuttle from Earth

The following chart shows the distance of Comet 109P/Swift-Tuttle from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 109P/Swift-Tuttle is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet 109P/Swift-Tuttle from Earth between January 2013 and December 2100

Light Curve of Comet 109P/Swift-Tuttle

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 109P/Swift-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 109P/Swift-Tuttle between January 2013 and December 2100

Comet 109P/Swift-Tuttle Orbital Elements

The following table lists the orbital elements of Comet 109P/Swift-Tuttle at epoch 09 October 1995 00:00 UTC (JD: 2450000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.96322576
Orbit inclination i 113.45381700°
Perihelion distance q 0.95951616 AU
143,541,574 km
Aphelion distance Q 51.22462284 AU
7,663,094,520 km
Semi-major axis a 26.09206950 AU
3,903,318,047 km
Orbital period period 133.2800 years
48,681.1935 days
Date of perihelion transit Tp 1992-Dec-11 23:59:41
2,448,968.4998 JD
Next perihelion transit 2126-Mar-26 04:38
2,497,649.6932 JD
Argument of perihelion peri 152.98216763059°
Longitude of the ascending node node 139.38119208159°
Mean anomaly M 7.6316961671242°
Mean motion n 0.00739505°/day
Closest approach to Earth* 2013-Feb-17
Distance of closest approach* 32.76524309 AU
4,901,610,610 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2100-Dec-31, with a sampling interval of 1 day.