science

Tau Herculids

Tau Herculids is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tau Herculids rather than just read about it. In short: The Tau Herculids (TAH #0061) are a meteor shower that when discovered in 1930 appeared to originate from the star Tau Herculis. The parent comet of the Tau Herculids is periodic comet Schwassmann-Wachmann 3 with a 5.4 year orbital period.

Key takeaways

Tau Herculids belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tau Herculids to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tau Herculids from memory before moving on to harder problems.

Reference excerpt

The Tau Herculids (TAH #0061) are a meteor shower that when discovered in 1930 appeared to originate from the star Tau Herculis. The parent comet of the Tau Herculids is periodic comet Schwassmann-Wachmann 3 with a 5.4 year orbital period. This meteor shower occurs from May 19 - June 19. The meteor shower was first observed by the Kwasan Observatory in Kyoto, Japan in May 1930. The Tau Herculids' average radiant was α=236°, δ=+41°. Due to orbital perturbations of the meteor streams by Jupiter, 2022 activity will have a radiant of R.A. = 13:56 (209), Decl. = +28 (North-West of the star Arcturus in the constellation Boötes). The meteors are relatively slow moving making atmospheric entry at around 16 km/s (36,000 mph). On 31 May 1930 the comet passed about 0.062 AU (9.3 million km; 5.8 million mi) from Earth, on 9 June 1930 a meteor outburst with a zenithal hourly rate of around 100 was observed, and then the comet passed perihelion (closest approach to the Sun) on 14 June 1930. On 30–31 May 2022 (31 May 4:00-5:00 UT) there was a modest meteor shower generated by fragments from the 1995 break-up of the parent comet 73P. This required that fragments had been migrating ahead of the comet for the last 27 years. The parent comet has 69 known fragments and does not come to perihelion (0.97 AU from the Sun) until 25 August 2022. On 30 May 2022 comet 73P/Schwassmann–Wachmann was 1.5 AU from the Sun and 1.4 AU (210 million km) from Earth. The next notable appearances of the Tau Herculids are expected in 2033 and 2049.

References

External links tau Herculids as seen by the Global Meteor Network cameras (30 May 2022 Denis Vida) Radio Meteor Observations (peaking around 4:00 UT 31 May) Tau Herculids Meteors over Kitt Peak Telescopes (Astronomy Picture of the Day accumulated over 2.5 hours very late on May 30)

Illustrations

Worked examples

Example 1 — a first encounter with Tau Herculids

Start with the simplest possible case. Write down what Tau Herculids claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tau Herculids before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tau Herculids ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tau Herculids

In research: Tau Herculids appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Tau Herculids in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Tau Herculids is common in secondary-school and first-year university syllabi. It links to neighbouring topics Boötes, Hercules (constellation), June observances, so understanding it makes those chapters shorter.
In everyday life: Look for Tau Herculids outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tau Herculids in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tau Herculids means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Tau Herculids out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tau Herculids in simple terms?

Why does Tau Herculids matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tau Herculids?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tau Herculids.