Juno's Perijove-22 Jupiter Flyby, Reconstructed in 125-Fold Time-Lapse

2019-09-27 18:55 UT
Credit : NASA / JPL / SwRI / MSSS / SPICE / Gerald Eichstädt © cc by
Submitted By : Maquet-80
Mission Phase : PERIJOVE 22

On September 12, 2019, NASA's Juno probe successfully performed her Perijove-22 Jupiter flyby.

The movie is a reconstruction of the 2 hours and 30 minutes between 2019-09-12T03:00:00.000 and 2019-09-12T05:00:00.000 in 125-fold time-lapse.

It is based on 36 of the JunoCam images taken, and on spacecraft trajectory data provided via SPICE kernel files.

In steps of five real-time seconds, one still images of the movie has been rendered from at least one suitable raw image. This resulted in short scenes, usually of a few seconds.

Playing with 25 images per second results in 125-fold time-lapse.

Resulting overlapping scenes have been blended using the ffmpeg tool.

In natural colors, Jupiter looks pretty pale. Therefore, the still images are approximately illumination-adusted, i.e. almost flattened, and consecutively gamma-stretched to the 4th power of radiometric values, in order to enhance contrast and color.

Like for previous flybys, Juno approached Jupiter from north, and left Jupiter looking towards the soutern hemisphere. Closest approach to Jupiter was 7,975 km above the nominal IAU 1-bar level, and near 21.6 degrees north (planetocentric), according to long-term planning of November 2017.

During this flyby, Juno happened to fly over Io's shadow. Five of the PJ22 images show the shadow. They are part of the image sequence used for the flyby movie.

JunoCam was built and is operated by Malin Space Science Systems in San Diego / California / USA.

Many people at NASA, JPL, SwRI, and elsewhere have been, are, and will be required to plan and operate the Juno mission.