astronomy

TOI-5788

TOI-5788 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 TOI-5788 rather than just read about it. In short: TOI-5788 (also known as TIC 42883782) is a metal-poor yellow dwarf of spectral class G4, located approximately 318 light-years away from us in the zodiacal constellation Lyra. Its apparent visual magnitude is 10.15, making it invisible to the naked eye but observable with a standard telescope.

Key takeaways

TOI-5788 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect TOI-5788 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of TOI-5788 from memory before moving on to harder problems.

Reference excerpt

TOI-5788 (also known as TIC 42883782) is a metal-poor yellow dwarf of spectral class G4, located approximately 318 light-years away from us in the zodiacal constellation Lyra. Its apparent visual magnitude is 10.15, making it invisible to the naked eye but observable with a standard telescope. Two exoplanets orbit it, designated as TOI-5788 b and TOI-5788 c, where the former is classified as a rocky planet and the latter is a mini-Neptune. The object's parameters are close to those of the Sun, but it possesses a significantly lower metallicity of -0.32, a mass and radius of 0.87, with an effective surface temperature reaching 5615 K. The star's age is estimated to be approximately 5.7 billion years, making it somewhat older than the Sun.

Planetary system

In 2022, during its monitoring of the northern celestial hemisphere, TESS space telescope detected periodic dips in the brightness of the star TOI-5788. Analysis of the light curves revealed two transit signals with periods of 6.34 and 16.21 days. In 2023, the object was officially designated a TESS Object of Interest, abbreviated as TOI, and the planet candidates were named TOI-5788.01 and TOI-5788.02. From 2024 to 2025, targeted observations were conducted by the European space telescope CHEOPS. As a result, the uncertainty in radius determination was minimized, with the radius of the first planet being 1.53 R🜨 and the radius of the second being 2.27 R🜨. This data allowed for the confirmation that the planets are on opposite sides of the "radius gap." Concurrently, an intensive radial velocity observation campaign of the star was carried out using the HARPS-N spectrograph, installed on the Italian National Telescope Galileo. From 2023 to 2025, several dozen high-precision spectra of the star were obtained. Astronomers measured the shift in spectral lines caused by the star's motion at speeds of just a few meters per second. Through mathematical separation of the signals, their precise masses were calculated: 3.72 M🜨 for the first planet and 6.4 M🜨 for the second. With data on mass and radius, scientists were able to calculate the average density of the planets. This identified planet b as rocky and planet c as a mini-Neptune.

In the second half of 2025, a research group applied the Gaussian Process method. Computer simulations were performed, which showed that the planets' orbits are stable over a timescale of at least 1 billion years, despite their relative proximity to each other. In January 2026, the exoplanets were officially confirmed.

See also List of exoplanets discovered in 2026

References

Illustrations

Worked examples

Example 1 — a first encounter with TOI-5788

Start with the simplest possible case. Write down what TOI-5788 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 TOI-5788 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 TOI-5788 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 TOI-5788

In research: TOI-5788 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 TOI-5788 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: TOI-5788 is common in secondary-school and first-year university syllabi. It links to neighbouring topics G-type main-sequence stars, Lyra, Planetary systems with two confirmed planets, so understanding it makes those chapters shorter.
In everyday life: Look for TOI-5788 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 TOI-5788 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what TOI-5788 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 TOI-5788 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is TOI-5788 in simple terms?

Why does TOI-5788 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 TOI-5788?

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 TOI-5788.