astronomy

UGPS J072227.51−054031.2

UGPS J072227.51−054031.2 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 UGPS J072227.51−054031.2 rather than just read about it. In short: UGPS J072227.51−054031.2 (designation often abbreviated to UGPS 0722−05) is a sub-brown dwarf or rogue planet of late T type, located approximately 4.1 parsecs (13 light-years) from Earth. It is the second closest known object of this type, after WISE 0855-0714.

Key takeaways

UGPS J072227.51−054031.2 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect UGPS J072227.51−054031.2 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of UGPS J072227.51−054031.2 from memory before moving on to harder problems.

Reference excerpt

UGPS J072227.51−054031.2 (designation often abbreviated to UGPS 0722−05) is a sub-brown dwarf or rogue planet of late T type, located approximately 4.1 parsecs (13 light-years) from Earth. It is the second closest known object of this type, after WISE 0855-0714. The object is roughly the volume of Jupiter, but is estimated to have 3–11 Jupiter masses (MJ). This would make it less massive than ε Indi Ba. As objects of this type below 13 Jupiter masses are thought to be more likely to be planets than Brown Dwarfs, it would either be classified as a planet or a sub-brown dwarf, depending on how it formed and the definition used. Infrared spectra shows the object contains water vapor and methane and has a surface temperature of approximately 480–560 kelvins.

History of observations

UGPS 0722-05 was discovered by Philip Lucas at the University of Hertfordshire and announced in 2010. The discovery image was taken on 28 November 2006 by the UKIRT Infrared Deep Sky Survey (UKIDSS) with a recovery image confirming the object's proper motion on 2 March 2010. It was initially reported to be at an even closer distance of 2.9 parsecs (9.5 light-years), which would have placed it among the ten nearest astronomical objects to the Sun, but later measurements revealed that the object was in fact located at a greater distance than initially thought, at 4.1+0.6−0.5 parsecs (13.4+2.0−1.6 light-years).

Space motion UGPS 0722−05 has proper motion of about 970 milliarcseconds per year. Radial velocity of UGPS 0722-05, measured by Bochanski et al. and published in 2011, is 46.9±2.5 km/s.

Notes

References

External links Article on UGPS 0722-05 at SolStation.com

Worked examples

Example 1 — a first encounter with UGPS J072227.51−054031.2

Start with the simplest possible case. Write down what UGPS J072227.51−054031.2 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 UGPS J072227.51−054031.2 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 UGPS J072227.51−054031.2 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 UGPS J072227.51−054031.2

In research: UGPS J072227.51−054031.2 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 UGPS J072227.51−054031.2 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: UGPS J072227.51−054031.2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 2010, Local Bubble, Monoceros, so understanding it makes those chapters shorter.
In everyday life: Look for UGPS J072227.51−054031.2 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 UGPS J072227.51−054031.2 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what UGPS J072227.51−054031.2 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 UGPS J072227.51−054031.2 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is UGPS J072227.51−054031.2 in simple terms?

Why does UGPS J072227.51−054031.2 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 UGPS J072227.51−054031.2?

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 UGPS J072227.51−054031.2.