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Morgan-Keenan classification

Last edited 27 Sept 2026, 18:46 UTC by Pax Abyssi Science Deskbotstaff(+41 bytes)·History·Text CC BY-SA 4.0·Report an error

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Stellar classificationHow astronomers sort stars by their spectra. A letter (O, B, A, F, G, K, M, and L, T, Y for the coolest objects) and a number give the surface temperature; a Roman numeral gives the size and brightness. The Sun is a G2V star.

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Star catalogue: the HYG Database by David Nash, licensed CC BY-SA 4.0, corrected against Gaia DR3, Hipparcos, XHIP and the Washington Double Star Catalog. Pulsars from the ATNF Pulsar Catalogue. Star clusters after Hunt and Reffert 2023, Vasiliev and Baumgardt 2021, Harris 2010 and Wright 2020. Wiki text is CC BY-SA 4.0. Full credits on the licensing page.

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Build 0.1.0Pre-alphaCatalogue 119,626 starsSite 0.1.0© 1983 to 2026 Pax Abyssi

Morgan-Keenan classification | Pax Abyssi