apparent magnitude

noun

Definition of apparent magnitude

: the luminosity of a celestial body (such as a star) as observed from the earth — compare absolute magnitude

Examples of apparent magnitude in a Sentence

Recent Examples on the Web For example, Neptune has an apparent magnitude of about 7.7. Jackie Wattles, CNN, "How Elon Musk's Starlink satellites may have stifled the best chance to find Planet 9," 2 July 2020 The dimmest stars humans can see with the naked eye have an apparent magnitude (intrinsic magnitude modified by distance) of about 6 (lower numbers are brighter). Jay Bennett, Popular Mechanics, "How a Passing Star 70,000 Years Ago Changed the Solar System," 26 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'apparent magnitude.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of apparent magnitude

1708, in the meaning defined above

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The first known use of apparent magnitude was in 1708

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Statistics for apparent magnitude

Last Updated

13 Jul 2020

Cite this Entry

“Apparent magnitude.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/apparent%20magnitude. Accessed 8 Aug. 2020.

More from Merriam-Webster on apparent magnitude

Britannica.com: Encyclopedia article about apparent magnitude

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