ArticleslgStudy

chemistry

HH 111

HH 111 is a chemistry 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 HH 111 rather than just read about it. In short: HH 111 is a Herbig–Haro object in the L1617 dark cloud of the Orion B molecular cloud in the constellation of Orion. It is a prototype of a highly collimated optical jet sources.

HH 111 — main illustration
HH 111 — illustration

Key takeaways

  • HH 111 belongs to chemistry; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect HH 111 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of HH 111 from memory before moving on to harder problems.

Reference excerpt

HH 111 is a Herbig–Haro object in the L1617 dark cloud of the Orion B molecular cloud in the constellation of Orion. It is a prototype of a highly collimated optical jet sources. It shows several bow shocks and has a length of about 2.6 light-years (0.8 parsec). HH 111 is about 1300 light years (400 parsec) distant from earth and the central source is IRAS 05491+0247, also called VLA 1. This source is the driving source of the jets and it is a class I protostar with a luminosity of about 25 L☉. This protostar is embedded in a 30 M☉ cloud core. The dynamical age of the complex is only 800 years. Near the central source an ammonia feature called NH3-S was found, which is a starless core with a turbulent interior induced by HH 111. The jets move with a speed of 300–600 km/s and consist of a blueshifted component, which is bright in optical wavelengths and a redshifted faint counterjet. A second pair of bipolar jets, called HH 121, was discovered in the near-infrared at an angle of 61° compared to the HH 111 pair. This was taken as evidence for a system with multiple protostars.

Gallery

References

External links

Animations of HH object jets from HST observations Geometry of the multiple star system (from 2000)

Illustrations

HH 111 illustration
HH 111 illustration
HH 111 illustration
HH 111 illustration

Worked examples

Example 1 — a first encounter with HH 111

Start with the simplest possible case. Write down what HH 111 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, 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 HH 111 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 HH 111 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 HH 111

In research
HH 111 appears in chemistry 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 HH 111 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
HH 111 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Herbig–Haro objects, Orion (constellation), Orion molecular cloud complex, so understanding it makes those chapters shorter.
In everyday life
Look for HH 111 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.
Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “HH 111” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study HH 111 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what HH 111 means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain HH 111 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HH 111 in simple terms?

HH 111 is a Herbig–Haro object in the L1617 dark cloud of the Orion B molecular cloud in the constellation of Orion. It is a prototype of a highly collimated optical jet sources.

Why does HH 111 matter?

Because it connects several chemistry 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 HH 111?

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 HH 111.

Tags

  • Herbig–Haro objects
  • Orion (constellation)
  • Orion molecular cloud complex

Keep exploring