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Comet C/2018 X2 (Fitzsimmons)

Available Resources

Comet C/2018 X2 (Fitzsimmons) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2018 X2 (Fitzsimmons) 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 X2 (Fitzsimmons) in Auriga on March, 25 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]
04h 57m 07s
+42° 08’ 29”

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 X2 (Fitzsimmons) Rise and Set Times

Comet C/2018 X2 (Fitzsimmons) is circumpolar from Greenwich, United Kingdom [change] and transits at 16:45 UTC (altitude: 80.7°)

Comet C/2018 X2 (Fitzsimmons) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 X2 (Fitzsimmons) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 X2 (Fitzsimmons) 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 X2 (Fitzsimmons)
View Comet C/2018 X2 (Fitzsimmons) in the 3D Solar System Simulator

Comet C/2018 X2 (Fitzsimmons) Ephemeris

The following table lists the ephemerides of Comet C/2018 X2 (Fitzsimmons) 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 X2 (Fitzsimmons) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Mar 18 04h 42m 38s +42° 57’ 19” 16.69 Perseus
2019 Mar 19 04h 44m 30s +42° 50’ 48” 16.67 Perseus
2019 Mar 20 04h 46m 24s +42° 44’ 18” 16.66 Perseus
2019 Mar 21 04h 48m 20s +42° 37’ 46” 16.64 Perseus
2019 Mar 22 04h 50m 17s +42° 31’ 14” 16.62 Perseus
2019 Mar 23 04h 52m 14s +42° 24’ 41” 16.61 Auriga
2019 Mar 24 04h 54m 12s +42° 18’ 06” 16.59 Auriga
2019 Mar 25 04h 56m 12s +42° 11’ 30” 16.57 Auriga
2019 Mar 26 04h 58m 14s +42° 04’ 51” 16.56 Auriga
2019 Mar 27 05h 00m 15s +41° 58’ 11” 16.54 Auriga
2019 Mar 28 05h 02m 17s +41° 51’ 29” 16.52 Auriga
2019 Mar 29 05h 04m 22s +41° 44’ 44” 16.51 Auriga
2019 Mar 30 05h 06m 26s +41° 37’ 59” 16.49 Auriga
2019 Mar 31 05h 08m 31s +41° 31’ 09” 16.47 Auriga

Distance of Comet C/2018 X2 (Fitzsimmons) from Earth

The following chart shows the distance of Comet C/2018 X2 (Fitzsimmons) 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 X2 (Fitzsimmons) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2018 X2 (Fitzsimmons) from Earth between January 2013 and December 2100

Light Curve of Comet C/2018 X2 (Fitzsimmons)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2018 X2 (Fitzsimmons), 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 X2 (Fitzsimmons) between January 2013 and December 2100

Comet C/2018 X2 (Fitzsimmons) Orbital Elements

The following table lists the orbital elements of Comet C/2018 X2 (Fitzsimmons) at epoch 11 December 2018 00:00 UTC (JD: 2458464.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.98637409
Orbit inclination i 23.05931538°
Perihelion distance q 2.12524801 AU
317,932,577 km
Aphelion distance Q 309.81693505 AU
46,347,953,883 km
Semi-major axis a 155.97109153 AU
23,332,943,230 km
Orbital period period 1,947.9300 years
711,483.1089 days
Date of perihelion transit Tp 2019-Jul-08 04:10:06
2,458,672.6737 JD
Argument of perihelion peri 162.00523646848°
Longitude of the ascending node node 340.82285774298°
Mean anomaly M 359.89466717601°
Mean motion n 0.00050599°/day
Closest approach to Earth* 2019-Jan-07
Distance of closest approach* 2.22804485 AU
333,310,766 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.