science

HIP 85605

HIP 85605 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 HIP 85605 rather than just read about it. In short: HIP 85605 is a star in the constellation Hercules with a visual apparent magnitude of 11.03. It was once thought to be a M dwarf or K-type main-sequence star and a possible companion of the brighter star HIP 85607, but they are now known to be an optical double.

Key takeaways

HIP 85605 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect HIP 85605 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HIP 85605 from memory before moving on to harder problems.

Reference excerpt

HIP 85605 is a star in the constellation Hercules with a visual apparent magnitude of 11.03. It was once thought to be a M dwarf or K-type main-sequence star and a possible companion of the brighter star HIP 85607, but they are now known to be an optical double. Both objects are red giants separated by a greater distance than the original measurements indicated: HIP 85605 is 1,730±10 light years away while HIP 85607 is 1,323±13 light years away.

Distance estimation The original Hipparcos parallax measurement in 1997 was 202 mas, which would have placed it 16.1 light-years from the Solar System. In 2007, van Leeuwen revised the number to 147 mas (0.147 arcseconds), or 22.2 light-years. With this new value, HIP 85605 would have been unlikely to be one of the 100 closest star systems to the Sun. In 2014, it was estimated that HIP 85605 could approach to about 0.13 to 0.65 light-years (0.04 to 0.2 pc) from the Sun within 240,000 to 470,000 years, assuming the then-known parallax and distance measurements to the object were correct. In that case its gravitational influence could have disrupted the orbits of comets in the Oort cloud and caused some of them to enter the inner Solar System. With the release of Gaia DR2, it was determined that HIP 85605 is actually a much more distant 1,790±30 light-years away and will not be passing remotely close to the Sun at any point in time.

See also Stars that actually passed/will pass close to the Sun: Scholz's Star Gliese 710 List of nearest stars and brown dwarfs

References

External links Frequently asked questions to Close encounters of the stellar kind by C.A.L. Bailer-Jones HIP 85605 at the SIMBAD Astronomical Database. Ids – Bibliography – Image – B&W Image.

Worked examples

Example 1 — a first encounter with HIP 85605

Start with the simplest possible case. Write down what HIP 85605 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 HIP 85605 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 HIP 85605 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 HIP 85605

In research: HIP 85605 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 HIP 85605 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: HIP 85605 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Hercules (constellation), Hipparcos objects, K-type giants, so understanding it makes those chapters shorter.
In everyday life: Look for HIP 85605 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 HIP 85605 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HIP 85605 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 HIP 85605 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HIP 85605 in simple terms?

Why does HIP 85605 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 HIP 85605?

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 HIP 85605.