science

List of Kreutz sungrazers

List of Kreutz sungrazers is a science 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 List of Kreutz sungrazers rather than just read about it. In short: The Kreutz sungrazers are a group of comets descended from the breakup of a comet in about 371 BC. They are typically traveling less than 2 solar radii from the Sun.

Key takeaways

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

Reference excerpt

The Kreutz sungrazers are a group of comets descended from the breakup of a comet in about 371 BC. They are typically traveling less than 2 solar radii from the Sun. Because they travel so close, they often burn up. Many bright comets are members of the group, including Comet Ikeya–Seki, which broke in 3 pieces in its 1965 perihelion. The Kreutz sungrazers can be subdivided into several groups- a primary group at inclination ~144° and node ~5, and a secondary, smaller group at inclination ~139° node ~350°. The entire group spans several degrees across in their orbits, and make up a significant portion of the known comets in the Solar System — as of November 2015, about 3000 of the 4000 known comets belong to the Kreutz sungrazers group. Many of these short arc comets are assumed to have an orbital eccentricity of 1.0 because their long-term orbits are poorly constrained. Kreutz comets discovered through the Solar and Heliospheric Observatory (SOHO) also have their numerical designations included in the list, whether or not they received official designations from the Minor Planet Center. Members that have been observed from the ground and those bright enough to be considered as great comets were also color coded, to further distinguish them from smaller ones only observed by satellites in space.

Until the 19th century

Before 1100 Most of the comets listed here were potential members of the Kreutz family that were identified by Ichiro Hasegawa and Katherine Jane England, respectively. Comet names starting with X/ indicate a comet for which no reliable orbit is known.

1100s to 1700s

1800s

20th century

1900 to 1979

1980 to 1995

1996 Since 1996, the Solar and Heliospheric Observatory (SOHO) had discovered more comets than anyone in history, of which 86% of the approximately 3,100 comets it had discovered (as of 2016) belong to the Kreutz sungrazer family.

1997

1998

1999

2000s

2000

2001

2002

2003

2004

2005

2006

2007

2008 Since May 2008, the Small-Body Database of the Jet Propulsion Laboratory no longer list any Kreutz comets discovered through SOHO to its catalog, although the Minor Planet Center continued to assign official designations to them. The last SOHO Kreutz comet listed on JPL-SBDB was C/2008 J16 (SOHO).

2009

2010s

2010

2011 From 2011 onwards, most SOHO comets have not received an official designation from the Minor Planet Center. Exceptions include notable comets like C/2020 X3 (SOHO), which appeared during the total solar eclipse on 14 December 2020.

2012

2013

2014

2015

2016

2017

2018

2019

2020s

2020

2021

2022

2023

2024

2025 Since February 2025, new members of the Kreutz family are also being discovered through the Compact Coronagraph (CCOR) instrument aboard the GOES-19 satellite.

2026

See also List of comets by type List of parabolic and hyperbolic comets List of near-parabolic comets List of long-period comets List of Halley-type comets List of periodic comets List of numbered comets

References

External links The Sungrazer Project for a more complete catalog of the Kreutz family, including undesignated SOHO comets The SMM Sungrazers by Gary W. Kronk The Solwind Sungrazers by Gary W. Kronk

Illustrations

Worked examples

Example 1 — a first encounter with List of Kreutz sungrazers

Start with the simplest possible case. Write down what List of Kreutz sungrazers claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 List of Kreutz sungrazers 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 List of Kreutz sungrazers 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 List of Kreutz sungrazers

In research: List of Kreutz sungrazers appears in science 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 List of Kreutz sungrazers 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: List of Kreutz sungrazers is common in secondary-school and first-year university syllabi. It links to neighbouring topics Kreutz Sungrazers, Lists of comets, Long-period comets, so understanding it makes those chapters shorter.
In everyday life: Look for List of Kreutz sungrazers 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 List of Kreutz sungrazers in 20 minutes

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

Frequently asked questions

What is List of Kreutz sungrazers in simple terms?

The Kreutz sungrazers are a group of comets descended from the breakup of a comet in about 371 BC. They are typically traveling less than 2 solar radii from the Sun.

Why does List of Kreutz sungrazers matter?

Because it connects several science 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 List of Kreutz sungrazers?

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 List of Kreutz sungrazers.