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Comet C/2018 F1 (Grauer)

Available Resources

Comet C/2018 F1 (Grauer) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2018 F1 (Grauer) 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 F1 (Grauer) in Hercules 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]
16h 40m 40s
+11° 08’ 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 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 F1 (Grauer) Rise and Set Times

Today's Comet C/2018 F1 (Grauer) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 78.9°
Max altitude: 49.7°
Azimuth: 281.1°

Comet C/2018 F1 (Grauer) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 F1 (Grauer) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 F1 (Grauer) 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 F1 (Grauer)
View Comet C/2018 F1 (Grauer) in the 3D Solar System Simulator

Comet C/2018 F1 (Grauer) Ephemeris

The following table lists the ephemerides of Comet C/2018 F1 (Grauer) 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 F1 (Grauer) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Dec 04 16h 25m 33s +11° 05’ 12” 17.83 Hercules
2018 Dec 05 16h 27m 29s +11° 05’ 15” 17.82 Hercules
2018 Dec 06 16h 29m 26s +11° 05’ 22” 17.82 Hercules
2018 Dec 07 16h 31m 22s +11° 05’ 36” 17.82 Hercules
2018 Dec 08 16h 33m 17s +11° 05’ 57” 17.82 Hercules
2018 Dec 09 16h 35m 13s +11° 06’ 24” 17.81 Hercules
2018 Dec 10 16h 37m 09s +11° 06’ 56” 17.81 Hercules
2018 Dec 11 16h 39m 06s +11° 07’ 36” 17.81 Hercules
2018 Dec 12 16h 41m 03s +11° 08’ 21” 17.81 Hercules
2018 Dec 13 16h 42m 59s +11° 09’ 14” 17.81 Hercules
2018 Dec 14 16h 44m 56s +11° 10’ 13” 17.80 Hercules
2018 Dec 15 16h 46m 51s +11° 11’ 17” 17.80 Hercules
2018 Dec 16 16h 48m 48s +11° 12’ 29” 17.80 Hercules
2018 Dec 17 16h 50m 44s +11° 13’ 46” 17.80 Hercules

Distance of Comet C/2018 F1 (Grauer) from Earth

The following chart shows the distance of Comet C/2018 F1 (Grauer) 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 F1 (Grauer) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2018 F1 (Grauer) from Earth between January 2013 and December 2075

Light Curve of Comet C/2018 F1 (Grauer)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2018 F1 (Grauer), 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 F1 (Grauer) between January 2013 and December 2075

Comet C/2018 F1 (Grauer) Orbital Elements

The following table lists the orbital elements of Comet C/2018 F1 (Grauer) at epoch 11 April 2018 00:00 UTC (JD: 2458220.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99053722
Orbit inclination i 46.08358829°
Perihelion distance q 2.99305278 AU
447,754,323 km
Aphelion distance Q 629.60176949 AU
94,187,084,294 km
Semi-major axis a 316.29741113 AU
47,317,419,309 km
Orbital period period 5,625.3800 years
2,054,669.0674 days
Date of perihelion transit Tp 2018-Dec-14 02:27:19
2,458,466.6023 JD
Argument of perihelion peri 71.615609490182°
Longitude of the ascending node node 177.30585524037°
Mean anomaly M 359.95688024358°
Mean motion n 0.00017521°/day
Closest approach to Earth* 2018-Apr-15
Distance of closest approach* 2.88090917 AU
430,977,878 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.