astronomy

P/2010 H2 (Vales)

P/2010 H2 (Vales) 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 P/2010 H2 (Vales) rather than just read about it. In short: P/2010 H2 (Vales), is a distant Jupiter-family comet with a 7.5-year orbit around the Sun. Its frequent encounters with Jupiter also classify it as a quasi-Hilda comet.

Key takeaways

P/2010 H2 (Vales) belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect P/2010 H2 (Vales) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of P/2010 H2 (Vales) from memory before moving on to harder problems.

Reference excerpt

P/2010 H2 (Vales), is a distant Jupiter-family comet with a 7.5-year orbit around the Sun. Its frequent encounters with Jupiter also classify it as a quasi-Hilda comet. As of 2025, it is the only comet discovered so far by Slovenian astronomer, Jan Vales. It last came to perihelion in March 2025 and will next come to perihelion in September 2032. The comet has not been observed since it was discovered during an outburst from magnitude 20 to magnitude 12 in April 2010. The comet is expected to normally only brighten to magnitude 20 when near perihelion. It will next come to opposition on 27 June 2026. P/2010 H2 (Vales) is part of the Unistellar citizen science tracking project.

Observational history The comet underwent a massive outburst when it was discovered by Jan Vales on 16 April 2010. No prediscovery observations earlier than 15 April 2010 were found. Later analysis of data from the Catalina Sky Survey indicated that the outburst may have been ongoing for 15 hours at the time, resulting in its brightness increased by a thousand-fold. Observations conducted on the day after discovery noted that its coma had undergone a significant increase in size, from 24–26 arcseconds to 34–38 arcseconds across. Although calculated to have a relatively short orbital period, it was not recovered during its next apparition in 2017. On 17 March 2023, Toni Scarmato reported the observation of an object close to the predicted position of P/2010 H2, indicating a possible recovery of the comet. Further analysis in 2024 did not match the position of the initial reports, concluding that Scarmato's find is likely a different object. Further search attempts in 2015 and 2025 from the 4.3-meter Lowell Discovery Telescope failed to recover the comet, indicating a possible absolute nuclear magnitude fainter than 20.6, and a nucleus smaller than 0.5 km (0.31 mi) in diameter assuming a geometric albedo of 0.04. However it is still likely that it may have become inactive after the 2010 outburst instead of simply disintegrating.

References

External links P/2010 H2 at the JPL Small-Body Database P/2010 H2 at Seiichi Yoshida's website

Worked examples

Example 1 — a first encounter with P/2010 H2 (Vales)

Start with the simplest possible case. Write down what P/2010 H2 (Vales) 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 P/2010 H2 (Vales) 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 P/2010 H2 (Vales) 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 P/2010 H2 (Vales)

In research: P/2010 H2 (Vales) 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 P/2010 H2 (Vales) 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: P/2010 H2 (Vales) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Discoveries by amateur astronomers, Jupiter-family comets, Lost comets, so understanding it makes those chapters shorter.
In everyday life: Look for P/2010 H2 (Vales) 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 P/2010 H2 (Vales) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what P/2010 H2 (Vales) 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 P/2010 H2 (Vales) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is P/2010 H2 (Vales) in simple terms?

P/2010 H2 (Vales), is a distant Jupiter-family comet with a 7.5-year orbit around the Sun. Its frequent encounters with Jupiter also classify it as a quasi-Hilda comet.

Why does P/2010 H2 (Vales) 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 P/2010 H2 (Vales)?

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 P/2010 H2 (Vales).