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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 Taurus on August, 20 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]
04h 15m 40s
+05° 35’ 47”

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 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: 84.4°
Max altitude: 44.1°
Azimuth: 275.6°

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 Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Aug 13 03h 59m 29s +04° 35’ 09” 13.61 Taurus
2018 Aug 14 04h 01m 44s +04° 43’ 39” 13.56 Taurus
2018 Aug 15 04h 03m 59s +04° 52’ 08” 13.52 Taurus
2018 Aug 16 04h 06m 14s +05° 00’ 37” 13.48 Taurus
2018 Aug 17 04h 08m 30s +05° 09’ 05” 13.44 Taurus
2018 Aug 18 04h 10m 45s +05° 17’ 34” 13.40 Taurus
2018 Aug 19 04h 13m 03s +05° 26’ 03” 13.36 Taurus
2018 Aug 20 04h 15m 20s +05° 34’ 32” 13.32 Taurus
2018 Aug 21 04h 17m 36s +05° 43’ 00” 13.28 Taurus
2018 Aug 22 04h 19m 54s +05° 51’ 29” 13.24 Taurus
2018 Aug 23 04h 22m 13s +06° 00’ 00” 13.20 Taurus
2018 Aug 24 04h 24m 30s +06° 08’ 30” 13.16 Taurus
2018 Aug 25 04h 26m 49s +06° 17’ 00” 13.12 Taurus
2018 Aug 26 04h 29m 09s +06° 25’ 32” 13.08 Taurus

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 15 August 1988 00:00 UTC (JD: 2447389.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.85994705
Orbit inclination i 18.40849405°
Perihelion distance q 1.58031983 AU
236,412,482 km
Aphelion distance Q 20.98714312 AU
3,139,631,930 km
Semi-major axis a 11.28373148 AU
1,688,022,206 km
Orbital period period 37.9000 years
13,844.5084 days
Date of perihelion transit Tp 1980-Dec-04 18:42:10
2,444,578.2793 JD
Next perihelion transit 2018-Oct-31 06:54
2,458,422.7877 JD
Argument of perihelion peri 359.52224621794°
Longitude of the ascending node node 78.007897451235°
Mean anomaly M 73.100425438071°
Mean motion n 0.02600309°/day
Closest approach to Earth* 2018-Dec-17
Distance of closest approach* 0.76573081 AU
114,551,700 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.