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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 Cetus on January, 22 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]
00h 35m 28s
-07° 59’ 53”

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: 98.0°
Max altitude: 30.5°
Azimuth: 262.1°

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
2019 Jan 15 00h 23m 32s -09° 42’ 33” 16.03 Cetus
2019 Jan 16 00h 25m 06s -09° 28’ 56” 16.05 Cetus
2019 Jan 17 00h 26m 40s -09° 15’ 20” 16.08 Cetus
2019 Jan 18 00h 28m 15s -09° 01’ 45” 16.10 Cetus
2019 Jan 19 00h 29m 49s -08° 48’ 10” 16.12 Cetus
2019 Jan 20 00h 31m 24s -08° 34’ 36” 16.14 Cetus
2019 Jan 21 00h 33m 00s -08° 21’ 05” 16.17 Cetus
2019 Jan 22 00h 34m 35s -08° 07’ 32” 16.19 Cetus
2019 Jan 23 00h 36m 10s -07° 54’ 02” 16.21 Cetus
2019 Jan 24 00h 37m 45s -07° 40’ 35” 16.23 Cetus
2019 Jan 25 00h 39m 20s -07° 27’ 06” 16.25 Cetus
2019 Jan 26 00h 40m 57s -07° 13’ 41” 16.28 Cetus
2019 Jan 27 00h 42m 33s -07° 00’ 16” 16.30 Cetus
2019 Jan 28 00h 44m 08s -06° 46’ 54” 16.32 Cetus

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 29 August 2008 00:00 UTC (JD: 2454708.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.36748360
Orbit inclination i 13.66358542°
Perihelion distance q 2.30523089 AU
344,857,633 km
Aphelion distance Q 4.98384780 AU
745,573,020 km
Semi-major axis a 3.64453935 AU
545,215,327 km
Orbital period period 6.9600 years
2,541.3378 days
Date of perihelion transit Tp 2011-Sep-28 15:57:36
2,455,833.1650 JD
Next perihelion transit 2018-Sep-13 00:03
2,458,374.5028 JD
Argument of perihelion peri 207.68930513106°
Longitude of the ascending node node 117.30982342633°
Mean anomaly M 200.68257052177°
Mean motion n 0.14165767°/day
Closest approach to Earth* 2018-Aug-20
Distance of closest approach* 1.01420021 AU
151,722,193 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.