astronomy

IC 719

IC 719 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 IC 719 rather than just read about it. In short: IC 719 is a lenticular galaxy located in the constellation of Virgo. The redshift of the galaxy is estimated to be (z) 0.0061 and it was first discovered in March 1892 by the Austrian astronomer named Rudolph Spitaler who described it as a 13th magnitude galaxy.

Key takeaways

IC 719 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect IC 719 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IC 719 from memory before moving on to harder problems.

Reference excerpt

IC 719 is a lenticular galaxy located in the constellation of Virgo. The redshift of the galaxy is estimated to be (z) 0.0061 and it was first discovered in March 1892 by the Austrian astronomer named Rudolph Spitaler who described it as a 13th magnitude galaxy.

Description IC 719 is an early-type lenticular galaxy with an S0 classification. It has an almost bulgeless appearance and has a disk of H II gas that extends 100 kiloparsecs from its galactic center. There is also a secondary stellar disk component located in the same plane position as the ionized gas content in the galaxy. The stars in the ionized gas region are much younger and can be categorized as metal-rich when compared to the counterrotating component. The total molecular gas mass of the galaxy is estimated to be 8.34 ± 0.05 M☉, while the star formation is around 0.5 M☉ per year, with most star formation activity taking place within an elliptical ring. A study published in August 2018, has found that the main stellar disk component of IC 719 is even hotter and much older, with a larger scale length, compared to the secondary disk component. When further observed, there are clearly two extended stellar components rotating opposite from each other. The more the velocity difference increases, the more the absorption lines are shown to separate. The main stellar disk is located on the northwest side of the galaxy, with rotation approximately ± 150 kilometers per second and a velocity dispersion shown to differ between 70 and 30 kilometers per second from its central radius right outwards to its outermost regions. The secondary disk, meanwhile, has a steeper velocity gradient and is much colder kinematically.

Supernova One supernova has been observed in IC 719: SN 2021kos (Type Ib, mag. 18.34) was discovered by the Zwicky Transient Facility on 19 April 2021.

References

External links IC 719 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images IC 719 on HyperLeda

Illustrations

Worked examples

Example 1 — a first encounter with IC 719

Start with the simplest possible case. Write down what IC 719 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 IC 719 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 IC 719 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 IC 719

In research: IC 719 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 IC 719 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: IC 719 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1892, IC objects, IRAS catalogue objects, so understanding it makes those chapters shorter.
In everyday life: Look for IC 719 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 IC 719 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IC 719 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 IC 719 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IC 719 in simple terms?

Why does IC 719 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 IC 719?

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 IC 719.