astronomy

HIP 17453

HIP 17453 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 HIP 17453 rather than just read about it. In short: HIP 17453 is a star in the constellation Taurus. At an apparent magnitude of +6.074, it is faintly visible to the naked eye in locations far from light pollution.

Key takeaways

HIP 17453 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect HIP 17453 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HIP 17453 from memory before moving on to harder problems.

Reference excerpt

HIP 17453 is a star in the constellation Taurus. At an apparent magnitude of +6.074, it is faintly visible to the naked eye in locations far from light pollution. Parallax measurements give a distance of 264 light-years (80.8 parsecs).

Characteristics The spectrum of this star matches a spectral class of A0Vp (λ Boo), with the luminosity class V indicating it is a main sequence star fusing atoms of hydrogen into helium at its core. The spectrum also indicates that it is a Lambda Boötis star. These stars are characterized by the underabundance of iron peak metals and solar abundances of volatile elements such as carbon, nitrogen, oxygen and sulfur. HIP 17453 is an estimated 280±125 million years old, with 2.08 times the mass of the Sun and 1.78 times the Sun's radius. It radiates 23 times the Sun's luminosity from its photosphere at an effective temperature of 9,400 K. This temperature gives it the white hue typical of an A-type star.

Brown dwarf In 2026, a brown dwarf, named HIP 17453 B, was reported around the primary star by the C-BASS survey, which aims to detect companions around B and A-type stars. It was the first detection of the survey. The detection was made using the Near-Infrared Camera 2 adaptive optics instrument aboard the Keck 2 Telescope. Using medium-resolution spectral observations of the GNIRS spectograph aboard the Gemini North Telescope, the team obtained a spectral type of L2±1. HIP 17453 B has a luminosity of 1.6×10−4 L☉ and an age of 280±125 Myr. Evolutionary models predict a mass of 53 MJ and a temperature of 1,950 K for its luminosity and age. The Stefan–Boltzmann law implies a radius of 0.11 ± 0.01 R☉ for the given luminosity and temperature. The orbital motion of the brown dwarf has been tracked with a timescale of 10 years, making it possible to compute an orbit. However, since only a small portion of the full orbital path is known, the orbital elements are uncertain. The brown dwarfs orbits with a period of 3,340+4,190−1,270 years, with a semi-major axis of 287+206−78 au and an eccentricity of 0.79+0.16−0.27. The inclination is close to edge-on, at 106.8°+26.0°−9.6°.

Notes

References

Worked examples

Example 1 — a first encounter with HIP 17453

Start with the simplest possible case. Write down what HIP 17453 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 HIP 17453 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 HIP 17453 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 HIP 17453

In research: HIP 17453 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 HIP 17453 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: HIP 17453 is common in secondary-school and first-year university syllabi. It links to neighbouring topics A-type main-sequence stars, Bright Star Catalogue objects, Durchmusterung objects, so understanding it makes those chapters shorter.
In everyday life: Look for HIP 17453 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 HIP 17453 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HIP 17453 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 HIP 17453 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HIP 17453 in simple terms?

HIP 17453 is a star in the constellation Taurus. At an apparent magnitude of +6.074, it is faintly visible to the naked eye in locations far from light pollution.

Why does HIP 17453 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 HIP 17453?

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 HIP 17453.