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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 Aquarius on February, 24 2018
High Precision Live Sky Chart
23h 02m 22s
-21° 24’ 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: 111.4°
Max altitude: 17.1°
Azimuth: 248.6°

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 Feb 17 19.16 22h 52m 58s -22° 23’ 57” Aquarius
2018 Feb 18 19.14 22h 54m 18s -22° 15’ 30” Aquarius
2018 Feb 19 19.12 22h 55m 37s -22° 07’ 01” Aquarius
2018 Feb 20 19.10 22h 56m 57s -21° 58’ 32” Aquarius
2018 Feb 21 19.08 22h 58m 18s -21° 49’ 59” Aquarius
2018 Feb 22 19.06 22h 59m 39s -21° 41’ 26” Aquarius
2018 Feb 23 19.04 23h 01m 00s -21° 32’ 52” Aquarius
2018 Feb 24 19.02 23h 02m 22s -21° 24’ 15” Aquarius
2018 Feb 25 19.00 23h 03m 43s -21° 15’ 38” Aquarius
2018 Feb 26 18.98 23h 05m 06s -21° 07’ 00” Aquarius
2018 Feb 27 18.96 23h 06m 29s -20° 58’ 18” Aquarius
2018 Feb 28 18.94 23h 07m 50s -20° 49’ 37” Aquarius
2018 Mar 01 18.92 23h 09m 14s -20° 40’ 54” Aquarius
2018 Mar 02 18.90 23h 10m 36s -20° 32’ 09” Aquarius

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.