astronomy

IC 2150

IC 2150 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 2150 rather than just read about it. In short: IC 2150 is a barred spiral galaxy in the constellation of Columba. Its velocity with respect to the cosmic microwave background is 3,196±7 km/s, which corresponds to a Hubble distance of 153.8 ± 10.8 Mly (47.14 ± 3.30 Mpc).

Key takeaways

IC 2150 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 2150 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IC 2150 from memory before moving on to harder problems.

Reference excerpt

IC 2150 is a barred spiral galaxy in the constellation of Columba. Its velocity with respect to the cosmic microwave background is 3,196±7 km/s, which corresponds to a Hubble distance of 153.8 ± 10.8 Mly (47.14 ± 3.30 Mpc). However, 16 non-redshift measurements give a closer mean distance of 140.12 ± 3.45 Mly (42.962 ± 1.057 Mpc). It was discovered by American astronomer Lewis Swift on 31 January 1898. IC 2150 has a possible active galactic nucleus, i.e. it has a compact region at the center of its galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.

Supernovae Three supernovae have been observed in IC 2150. The first two were discovered simultaneously.

SN 2016bfu (Type Ia-91bg-like, mag. 16.4) was discovered by Stu Parker on 20 March 2016. SN 2016bfv (Type II, mag. 17.2) was discovered by Stu Parker on 20 March 2016. SN 2026uxx (Type Ic, mag. 16.931) was discovered by ATLAS on 15 July 2026.

Illustrations

Worked examples

Example 1 — a first encounter with IC 2150

Start with the simplest possible case. Write down what IC 2150 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 2150 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 2150 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 2150

In research: IC 2150 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 2150 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 2150 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1898, Barred spiral galaxies, Columba (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for IC 2150 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 2150 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IC 2150 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 2150 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IC 2150 in simple terms?

Why does IC 2150 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 2150?

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 2150.