giovedì 28 settembre 2017

New comet C/2017 S3 PanSTARRS

New comet C/2017 S3 (PANSTARRS) was discovered 2017-Aug-17 at magnitude 21.8 by the Pan-STARRS survey.

The object's retrograde orbit is inclined 99 degrees from the ecliptic with the object currently at 4.9 AU from the sun.

The new comet is expected to pass perihelion in mid-August 2018 at only 0.2 AU from the sun. The ephemeris by the Minor Planet Center predicts a magnitude of 4.1 at perihelion but at very low solar elongation.

IC1805 Heart Nebula - 2017/08/25