21:17
when its radiant point sets below your western horizon.

The radiant point culminates (is highest in the sky) before nightfall – at around 18:00 PDT – and so the shower is likely produce its best displays soon after dusk, when the radiant point is still as high as possible.

At this time, the Earth’s rotation turns Los Angeles to face optimally towards the direction of the incoming meteors, maximising the number that rain vertically downwards, producing short trails close to the radiant point. At other times, there will be fewer meteors burning up over Los Angeles, and they will tend to enter the atmosphere at an oblique angle, producing long-lived meteors that may traverse a wide area of the sky before completely burning up.

The shower is expected to reach peak activity at around 05:00 PDT on 23 April 2024, and so the best displays might be seen before the radiant sets on 22 April and after dusk on 22 April.

Observing prospects

The Moon, in Virgo, will be only one day past full phase at the shower’s peak, presenting significant interference throughout the night.

The origin of the shower

Meteor showers arise when the Earth passes through streams of debris left
behind in the wake of comets and asteroids. Over time, the pieces of grit-like
debris in these streams distribute themselves along the length of the parent
object’s orbit around the solar system.

Shooting stars are seen whenever one of these pieces of debris collides with
the Earth’s atmosphere, typically burning up at an altitude of around 70 to 100
km.

On certain days of the year the Earth’s orbit passes through particularly dense
streams, associated with comets or asteroids which have vented particularly
large amounts of solid material to space, and this gives rise to an annual
meteor shower. Such showers recur on an annual basis, whenever the Earth passes
the particular point in its orbit where it crosses the particular stream of
material.

The meteors that are associated with any particular meteor shower can be
distinguished from others because their paths appear to radiate outwards from a
common point on the sky, which points back in the direction from which their
orbital motion brought them.

This is because the grit particles in any particular stream are travelling in
almost exactly the same direction when they cross the Earth’s orbit, owing to
having very similar orbits to the parent object they came from. They strike the
Earth from almost exactly the same direction, and at the same speed.

To see the most meteors, the best place to look is not directly at the radiant
itself, but at any dark patch of sky which is around 30–40° away from
it. It is at around this distance from the radiant that the most meteors will
be seen.

By determining the position of this radiant point on the sky, it is possible to
work out the orbit of the stream giving rise to any particular meteor shower.
It is sometimes even be possible to identify the particular body responsible
for creating the debris stream, if there is a known comet or asteroid with a
very similar orbit.

The parent body responsible for creating the π-Puppid shower has been identified as

comet 26P/Grigg-Skjellerup.

The radiant of the π-Puppid meteor shower is at around right ascension

07h10m, declination 45°S, as shown by the green circle on the planetarium above.

The sky on 23 Apr 2024

Source

The position of the radiant of this shower, and its predicted hourly rate, were
taken from International Meteor Organisation’s

List of Meteor Showers.

Image credit

© Jacek Halicki 2016. Perseid meteor seen in 2016 from Poland.