Early this week, watch for the Orionids

earthsky.org | 10/20/2019 | Guy Ottewell
bluelilly (Posted by) Level 3
Click For Photo: https://en.es-static.us/upl/2019/10/orionids-2019-ottewell-meteor-stream-300x201.jpg

View larger. | Here is the scene Sunday and Monday evenings – from Northern Hemisphere locations – as the Orionid meteors’ radiant rises into view. Notice the moon will be ascending in the sky at the same time. From the Southern Hemisphere, where this shower is also visible, the view is much the same, but the ecliptic – or path of the sun, moon and planets – and the celestial equator would be oriented differently with respect to the horizon. Chart via Guy Ottewell’s blog.

Originally printed at Guy Ottewell’s blog. Re-printed here with permission.

Meteors - Orionid - Shower - Peak - Mornings

You may already have seen outlying meteors of the annual Orionid shower. They should reach a peak on the mornings of October 21 and 22, in the hours after midnight. Their zenithal hourly rate – the number one alert person might count in an hour at the peak time, in perfect conditions and with the meteors coming from overhead – may be 25. You’ll be very lucky if you manage to count that many, especially as this year there is a last quarter moon in the sky at the same time.

The radiant of a meteor shower is the point or small area among the stars from which the meteors seem to fly. They are particles of dusk or rock shed long ago from a comet – in this case, periodic comet 1P Halley.

Particles - Earth - Atmosphere - Tracks - Miles

The particles emit light as they hit Earth’s atmosphere and burn up. Really, they are on parallel tracks, many miles apart, and can appear in any part of the sky. If you can trace one of these shining trails back to the Orion-Gemini constellations in our sky, it was an Orionid and not a sporadic meteor.

View larger. | Here is the Orionid meteor stream (dotted line) striking Earth Sunday night. Guy Ottewell – who made...
(Excerpt) Read more at: earthsky.org
Wake Up To Breaking News!
Sign In or Register to comment.

Welcome to Long Room!

Where The World Finds Its News!