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Comet 38P/Stephan-Oterma

Available Resources

Comet 38P/Stephan-Oterma Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet 38P/Stephan-Oterma 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 38P/Stephan-Oterma in Cetus on May, 26 2018
High Precision Live Sky Chart
01h 23m 09s
-07° 18’ 15”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Comet 38P/Stephan-Oterma Rise and Set Times

Today's Comet 38P/Stephan-Oterma rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 97.3°
Max altitude: 31.2°
Azimuth: 262.7°

Comet 38P/Stephan-Oterma Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 38P/Stephan-Oterma with respect of the Sun and the orbits of the major planets. The position of Comet 38P/Stephan-Oterma 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 38P/Stephan-Oterma
View Comet 38P/Stephan-Oterma in the 3D Solar System Simulator

Comet 38P/Stephan-Oterma Ephemeris

The following table lists the ephemerides of Comet 38P/Stephan-Oterma computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 38P/Stephan-Oterma in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 May 19 16.81 01h 11m 06s -08° 24’ 59” Cetus
2018 May 20 16.78 01h 12m 47s -08° 15’ 25” Cetus
2018 May 21 16.75 01h 14m 30s -08° 05’ 53” Cetus
2018 May 22 16.71 01h 16m 14s -07° 56’ 21” Cetus
2018 May 23 16.68 01h 17m 57s -07° 46’ 49” Cetus
2018 May 24 16.65 01h 19m 41s -07° 37’ 17” Cetus
2018 May 25 16.62 01h 21m 25s -07° 27’ 46” Cetus
2018 May 26 16.58 01h 23m 09s -07° 18’ 15” Cetus
2018 May 27 16.55 01h 24m 55s -07° 08’ 44” Cetus
2018 May 28 16.52 01h 26m 39s -06° 59’ 13” Cetus
2018 May 29 16.48 01h 28m 24s -06° 49’ 44” Cetus
2018 May 30 16.45 01h 30m 11s -06° 40’ 14” Cetus
2018 May 31 16.42 01h 31m 56s -06° 30’ 45” Cetus
2018 Jun 01 16.38 01h 33m 42s -06° 21’ 16” Cetus

Distance of Comet 38P/Stephan-Oterma from Earth

The following chart shows the distance of Comet 38P/Stephan-Oterma 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 38P/Stephan-Oterma is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet 38P/Stephan-Oterma from Earth between January 2013 and December 2075

Light Curve of Comet 38P/Stephan-Oterma

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 38P/Stephan-Oterma, 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 38P/Stephan-Oterma between January 2013 and December 2075

Comet 38P/Stephan-Oterma Orbital Elements

The following table lists the orbital elements of Comet 38P/Stephan-Oterma at epoch 16 February 1985 00:00 UTC (JD: 2446113.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.85935659
Orbit inclination i 18.30133220°
Perihelion distance q 1.58974053 AU
237,821,798 km
Aphelion distance Q 21.01694250 AU
3,144,089,853 km
Semi-major axis a 11.30334151 AU
1,690,955,826 km
Orbital period period 38.0000 years
13,880.6148 days
Date of perihelion transit Tp 1980-Dec-03 00:22:16
2,444,576.5155 JD
Next perihelion transit 2018-Dec-04 15:07
2,458,457.1302 JD
Argument of perihelion peri 359.46369385338°
Longitude of the ascending node node 78.175708544233°
Mean anomaly M 39.862386689354°
Mean motion n 0.02593545°/day
Closest approach to Earth* 2018-Dec-17
Distance of closest approach* 0.76545919 AU
114,511,066 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.