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Comet C/2018 W2 (Africano)

Available Resources

Comet C/2018 W2 (Africano) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2018 W2 (Africano) 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 W2 (Africano) in Ursa Major on January, 17 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]
14h 00m 44s
+61° 17’ 38”

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 W2 (Africano) Rise and Set Times

Comet C/2018 W2 (Africano) is circumpolar from Greenwich, United Kingdom [change] and transits at 06:15 UTC (altitude: 80.2°)

Comet C/2018 W2 (Africano) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 W2 (Africano) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 W2 (Africano) 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 W2 (Africano)
View Comet C/2018 W2 (Africano) in the 3D Solar System Simulator

Comet C/2018 W2 (Africano) Ephemeris

The following table lists the ephemerides of Comet C/2018 W2 (Africano) 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 W2 (Africano) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Jan 10 13h 51m 08s +57° 52’ 36” 17.36 Ursa Major
2019 Jan 11 13h 52m 24s +58° 19’ 10” 17.34 Ursa Major
2019 Jan 12 13h 53m 41s +58° 46’ 05” 17.31 Ursa Major
2019 Jan 13 13h 54m 59s +59° 13’ 19” 17.29 Ursa Major
2019 Jan 14 13h 56m 16s +59° 40’ 54” 17.26 Ursa Major
2019 Jan 15 13h 57m 33s +60° 08’ 49” 17.24 Ursa Major
2019 Jan 16 13h 58m 51s +60° 37’ 04” 17.21 Ursa Major
2019 Jan 17 14h 00m 11s +61° 05’ 36” 17.19 Ursa Major
2019 Jan 18 14h 01m 30s +61° 34’ 28” 17.17 Ursa Major
2019 Jan 19 14h 02m 49s +62° 03’ 39” 17.14 Ursa Major
2019 Jan 20 14h 04m 09s +62° 33’ 07” 17.12 Draco
2019 Jan 21 14h 05m 30s +63° 02’ 54” 17.09 Draco
2019 Jan 22 14h 06m 51s +63° 32’ 57” 17.07 Draco
2019 Jan 23 14h 08m 13s +64° 03’ 19” 17.05 Draco

Distance of Comet C/2018 W2 (Africano) from Earth

The following chart shows the distance of Comet C/2018 W2 (Africano) 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 W2 (Africano) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2018 W2 (Africano) from Earth between January 2013 and December 2075

Light Curve of Comet C/2018 W2 (Africano)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2018 W2 (Africano), 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 W2 (Africano) between January 2013 and December 2075

Comet C/2018 W2 (Africano) Orbital Elements

The following table lists the orbital elements of Comet C/2018 W2 (Africano) at epoch 04 December 2018 00:00 UTC (JD: 2458457.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99811948
Orbit inclination i 116.60971940°
Perihelion distance q 1.45337953 AU
217,422,483 km
Aphelion distance Q 1,544.27139236 AU
231,019,712,543 km
Semi-major axis a 772.86238594 AU
115,618,567,513 km
Orbital period period 21,486.2900 years
7,847,867.8957 days
Date of perihelion transit Tp 2019-Sep-06 02:12:03
2,458,732.5917 JD
Argument of perihelion peri 158.09059542529°
Longitude of the ascending node node 181.83011134486°
Mean anomaly M 359.98738090199°
Mean motion n 0.00004587°/day
Closest approach to Earth* 2019-Sep-28
Distance of closest approach* 0.49265480 AU
73,700,108 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.