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Comet C/2018 R4 (Fuls)

Available Resources

Comet C/2018 R4 (Fuls) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2018 R4 (Fuls) 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 C/2018 R4 (Fuls) in Pegasus on December, 11 2018
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]
23h 53m 30s
+13° 14’ 22”

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 C/2018 R4 (Fuls) Rise and Set Times

Today's Comet C/2018 R4 (Fuls) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 76.8°
Max altitude: 51.8°
Azimuth: 283.2°

Comet C/2018 R4 (Fuls) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 R4 (Fuls) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 R4 (Fuls) 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 C/2018 R4 (Fuls)
View Comet C/2018 R4 (Fuls) in the 3D Solar System Simulator

Comet C/2018 R4 (Fuls) Ephemeris

The following table lists the ephemerides of Comet C/2018 R4 (Fuls) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2018 R4 (Fuls) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Dec 04 23h 50m 08s +13° 20’ 03” 22.05 Pegasus
2018 Dec 05 23h 50m 31s +13° 18’ 56” 22.08 Pegasus
2018 Dec 06 23h 50m 56s +13° 17’ 57” 22.10 Pegasus
2018 Dec 07 23h 51m 20s +13° 17’ 04” 22.13 Pegasus
2018 Dec 08 23h 51m 46s +13° 16’ 18” 22.16 Pegasus
2018 Dec 09 23h 52m 13s +13° 15’ 38” 22.19 Pegasus
2018 Dec 10 23h 52m 40s +13° 15’ 06” 22.22 Pegasus
2018 Dec 11 23h 53m 08s +13° 14’ 39” 22.24 Pegasus
2018 Dec 12 23h 53m 35s +13° 14’ 18” 22.27 Pegasus
2018 Dec 13 23h 54m 06s +13° 14’ 04” 22.30 Pegasus
2018 Dec 14 23h 54m 36s +13° 13’ 56” 22.33 Pegasus
2018 Dec 15 23h 55m 06s +13° 13’ 54” 22.35 Pegasus
2018 Dec 16 23h 55m 37s +13° 13’ 59” 22.38 Pegasus
2018 Dec 17 23h 56m 11s +13° 14’ 11” 22.41 Pegasus

Distance of Comet C/2018 R4 (Fuls) from Earth

The following chart shows the distance of Comet C/2018 R4 (Fuls) 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 C/2018 R4 (Fuls) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2018 R4 (Fuls) from Earth between January 2013 and December 2075

Light Curve of Comet C/2018 R4 (Fuls)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2018 R4 (Fuls), 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 C/2018 R4 (Fuls) between January 2013 and December 2075

Comet C/2018 R4 (Fuls) Orbital Elements

The following table lists the orbital elements of Comet C/2018 R4 (Fuls) at epoch 12 September 2018 00:00 UTC (JD: 2458374.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99419128
Orbit inclination i 11.68277277°
Perihelion distance q 1.70938831 AU
255,720,852 km
Aphelion distance Q 586.84976210 AU
87,791,475,007 km
Semi-major axis a 294.27957521 AU
44,023,597,930 km
Orbital period period 5,048.3400 years
1,843,905.2785 days
Date of perihelion transit Tp 2018-Mar-03 14:45:54
2,458,181.1152 JD
Next perihelion transit 7066-Aug-11 21:26
4,302,086.3937 JD
Argument of perihelion peri 345.1424179974°
Longitude of the ascending node node 298.46301269168°
Mean anomaly M 0.037756019789355°
Mean motion n 0.00019524°/day
Closest approach to Earth* 2018-Aug-21
Distance of closest approach* 1.94798040 AU
291,413,720 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.