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Comet 48P/Johnson

Available Resources

Comet 48P/Johnson Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet 48P/Johnson 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 48P/Johnson in Pisces Austrinus on September, 25 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]
22h 28m 08s
-28° 47’ 26”
-
13.43
-

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 48P/Johnson Rise and Set Times

Today's Comet 48P/Johnson rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 118.8°
Max altitude: 9.7°
Azimuth: 241.2°

Comet 48P/Johnson Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 48P/Johnson with respect of the Sun and the orbits of the major planets. The position of Comet 48P/Johnson 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 48P/Johnson
View Comet 48P/Johnson in the 3D Solar System Simulator

Comet 48P/Johnson Ephemeris

The following table lists the ephemerides of Comet 48P/Johnson computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 48P/Johnson in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Sep 18 22h 29m 08s -28° 40’ 55” 13.31 Pisces Austrinus
2018 Sep 19 22h 28m 55s -28° 42’ 56” 13.32 Pisces Austrinus
2018 Sep 20 22h 28m 45s -28° 44’ 36” 13.34 Pisces Austrinus
2018 Sep 21 22h 28m 35s -28° 45’ 55” 13.35 Pisces Austrinus
2018 Sep 22 22h 28m 26s -28° 46’ 50” 13.37 Pisces Austrinus
2018 Sep 23 22h 28m 18s -28° 47’ 26” 13.39 Pisces Austrinus
2018 Sep 24 22h 28m 13s -28° 47’ 39” 13.40 Pisces Austrinus
2018 Sep 25 22h 28m 09s -28° 47’ 34” 13.42 Pisces Austrinus
2018 Sep 26 22h 28m 06s -28° 47’ 06” 13.44 Pisces Austrinus
2018 Sep 27 22h 28m 05s -28° 46’ 18” 13.46 Pisces Austrinus
2018 Sep 28 22h 28m 05s -28° 45’ 11” 13.48 Pisces Austrinus
2018 Sep 29 22h 28m 08s -28° 43’ 42” 13.49 Pisces Austrinus
2018 Sep 30 22h 28m 10s -28° 41’ 56” 13.51 Pisces Austrinus
2018 Oct 01 22h 28m 15s -28° 39’ 50” 13.53 Pisces Austrinus

Distance of Comet 48P/Johnson from Earth

The following chart shows the distance of Comet 48P/Johnson 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 48P/Johnson is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet 48P/Johnson from Earth between January 2013 and December 2075

Light Curve of Comet 48P/Johnson

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 48P/Johnson, 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 48P/Johnson between January 2013 and December 2075

Comet 48P/Johnson Orbital Elements

The following table lists the orbital elements of Comet 48P/Johnson at epoch 28 February 2006 00:00 UTC (JD: 2453795.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.36668135
Orbit inclination i 13.65891221°
Perihelion distance q 2.30932885 AU
345,470,679 km
Aphelion distance Q 4.98345760 AU
745,514,648 km
Semi-major axis a 3.64639322 AU
545,492,663 km
Orbital period period 6.9600 years
2,543.2771 days
Date of perihelion transit Tp 2004-Oct-11 21:35:58
2,453,290.4000 JD
Next perihelion transit 2011-Sep-29 04:14
2,455,833.6771 JD
Argument of perihelion peri 207.66814778889°
Longitude of the ascending node node 117.31602084479°
Mean anomaly M 71.496734441998°
Mean motion n 0.14154966°/day
Closest approach to Earth* 2018-Aug-20
Distance of closest approach* 1.01420310 AU
151,722,625 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.