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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 Pisces on December, 12 2017
High Precision Live Sky Chart
21h 39m 03s
-30° 41’ 03”
 = 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: 120.7°
Max altitude: 7.8°
Azimuth: 239.3°

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
2017 Dec 05 20.26 21h 33m 47s -31° 23’ 51” Pisces
2017 Dec 06 20.25 21h 34m 29s -31° 17’ 50” Pisces
2017 Dec 07 20.24 21h 35m 13s -31° 11’ 49” Pisces
2017 Dec 08 20.22 21h 35m 57s -31° 05’ 44” Pisces
2017 Dec 09 20.21 21h 36m 43s -30° 59’ 39” Pisces
2017 Dec 10 20.20 21h 37m 29s -30° 53’ 29” Pisces
2017 Dec 11 20.19 21h 38m 17s -30° 47’ 17” Pisces
2017 Dec 12 20.18 21h 39m 03s -30° 41’ 03” Pisces
2017 Dec 13 20.17 21h 39m 52s -30° 34’ 46” Pisces
2017 Dec 14 20.16 21h 40m 41s -30° 28’ 27” Pisces
2017 Dec 15 20.15 21h 41m 31s -30° 22’ 06” Pisces
2017 Dec 16 20.13 21h 42m 21s -30° 15’ 42” Pisces
2017 Dec 17 20.12 21h 43m 13s -30° 09’ 16” Pisces
2017 Dec 18 20.11 21h 44m 04s -30° 02’ 48” Pisces

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.