astronomy

HD 134060

HD 134060 is a astronomy 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 HD 134060 rather than just read about it. In short: HD 134060, also known by its Gould designation of 38 G. Circini, is a star in the southern constellation of Circinus.

Key takeaways

HD 134060 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect HD 134060 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 134060 from memory before moving on to harder problems.

Reference excerpt

HD 134060, also known by its Gould designation of 38 G. Circini, is a star in the southern constellation of Circinus. It is near the lower limit of stars visible to the naked eye, having an apparent visual magnitude of 6.29. The distance to HD 134060, as determined using an annual parallax shift measurement of 41.6 mas, is 78.4 light years. It is moving further away with a heliocentric radial velocity of 43.5 km/s, having come within 34.6 ly some 439,000 years ago. During the NStars project, Grey et al. (2006) found a stellar classification of G0 V Fe+0.4 for this star, matching a Sun-like G-type main-sequence star with an overabundance of iron in its outer atmosphere. However, an older classification of G3 IV is still used, which would suggest it is instead a more evolved subgiant star. HD 134060 has an estimated 1.07 times the mass of the Sun and 1.15 times the Sun's radius. It is radiating 1.63 times the Sun's luminosity from its photosphere at an effective temperature of about 5,965 K. The survey in 2015 have ruled out the existence of any additional stellar companions at projected distances from 22 to 163 astronomical units.

Planetary system Based upon an 8-year survey using the HARPS spectrograph at La Silla Observatory, in 2011 the detection of a pair of planets orbiting this star were announced. The inner planet, HD 134060 b, is in a tight, eccentric orbit around the star with a period of just over three days. The second object, HD 134060 c, has a more leisurely period of around 3.2 years and a high orbital eccentricity. The star was observed for a few hours by the Spitzer Space Telescope in the hopes of observing a transit by the inner planet, but none was detected. HD 134060 displays an infrared excess at a wavelength of 18μm, making it a warm debris disk candidate.

References

External links "Planet HD 134060 b", Extrasolar Planets Encyclopaedia, retrieved 2018-07-13. "Planet HD 134060 c", Extrasolar Planets Encyclopaedia, retrieved 2018-07-13.

Worked examples

Example 1 — a first encounter with HD 134060

Start with the simplest possible case. Write down what HD 134060 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 HD 134060 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 HD 134060 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 HD 134060

In research: HD 134060 appears in astronomy 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 HD 134060 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: HD 134060 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Circinus, Durchmusterung objects, G-type main-sequence stars, so understanding it makes those chapters shorter.
In everyday life: Look for HD 134060 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 HD 134060 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 134060 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 HD 134060 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 134060 in simple terms?

HD 134060, also known by its Gould designation of 38 G. Circini, is a star in the southern constellation of Circinus.

Why does HD 134060 matter?

Because it connects several astronomy 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 HD 134060?

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 HD 134060.