astronomy

Gliese 341 b

Gliese 341 b 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 Gliese 341 b rather than just read about it. In short: Gliese 341 b, also known as TOI-741 b or GJ 341 b, is a confirmed exoplanet orbiting Gliese 341, a red dwarf star located 33.9 light-years from Earth in the constellation Carina, visually close to the False Cross asterism. Having a radius of 0.92 R🜨 and an estimated mass of 0.72 M🜨, it is classified as a sub-Earth.

Key takeaways

Gliese 341 b belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Gliese 341 b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Gliese 341 b from memory before moving on to harder problems.

Reference excerpt

Gliese 341 b, also known as TOI-741 b or GJ 341 b, is a confirmed exoplanet orbiting Gliese 341, a red dwarf star located 33.9 light-years from Earth in the constellation Carina, visually close to the False Cross asterism. Having a radius of 0.92 R🜨 and an estimated mass of 0.72 M🜨, it is classified as a sub-Earth. It was discovered in 2024 via transit observations and analyzed by James Webb Space Telescope in the search for an atmosphere.

Properties Gliese 341 b classifies as a sub-Earth planet, having a radius of about 0.89 R🜨 (5,700 km). Its mass is poorly known, only an upper limit of 4.0 M🜨 could be derived. Mass-radius relationships estimate a mass of 0.72 M🜨. It has a short orbit around its host star, with an orbital period of just eight days. The planet's equilibrium temperature is estimated at 560 K (287 °C), while its irradiation temperature is 760 K (487 °C). As of 2024, it is not known whether TOI-741 b has an atmosphere. According to a transmission spectrum taken with the James Webb Space Telescope, scenarios such as a hazy atmosphere, a water-dominated atmosphere, or even no atmosphere are all plausible, while other scenarios such as an atmosphere with a high mean molecular weight are ruled out.

Discovery and observations Gliese 341 b was first identified in observations by the Transiting Exoplanet Survey Satellite (TESS) as a candidate planet yet to be confirmed. Its confirmation was first announced by a group of astronomers led by James Kirk, along with a transmission spectrum by the James Webb Space Telescope. They observed three transits of the planet detected by the James Webb Space Telescope's Near Infrared Camera (NIRCam) instrument. The discovery and confirmation was announced in January 2024. The planet was later analyzed by Victoria DiTomasso et al., which refined the planetary and stellar parameters, and ruled out additional planets with orbital periods less than 1,750 days (4.8 years) and masses greater than 15.1 M🜨.

Host star The host star of Gliese 341 b is Gliese 341, a nearby red dwarf 34 light-years from Earth in the constellation Carina. The star is about 48% the size of the Sun and 51% its mass, and has an effective temperature of 3800 K. With an apparent magnitude of 9.5, it is not visible to the naked eye, but can be observed through a small telescope. This star is visually close to the False Cross asterism, particularly close to Iota Carinae.

This star has long been studied because of its proximity and high proper motion, as well as it being a photometric and radial velocity standard star. It was once believed to be a spectroscopic binary, but this was ruled out in further observations. The closest star to TOI-741 is the red dwarf L 140-289, located 2.5 light years away. The neighboring star L 98-59 has four confirmed exoplanets.

See also List of exoplanets discovered in 2024 List of star systems within 30–35 light-years LHS 475 Gliese 486 List of terrestrial exoplanet candidates for atmosphere detection

Notes

Notes and references

Worked examples

Example 1 — a first encounter with Gliese 341 b

Start with the simplest possible case. Write down what Gliese 341 b 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 Gliese 341 b 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 Gliese 341 b 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 Gliese 341 b

In research: Gliese 341 b 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 Gliese 341 b 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: Gliese 341 b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Exoplanets discovered by TESS, Exoplanets in the Gliese Catalog, Sub-Earth exoplanets, so understanding it makes those chapters shorter.
In everyday life: Look for Gliese 341 b 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 Gliese 341 b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Gliese 341 b 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 Gliese 341 b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Gliese 341 b in simple terms?

Why does Gliese 341 b 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 Gliese 341 b?

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 Gliese 341 b.