OBAFGKM

AcronymDefinition
OBAFGKMOh, Be A Fine Girl/Guy, Kiss Me (mnemonic for the order of star temperatures)
OBAFGKMOnly Boys Accepting Feminism Get Kissed Meaningfully (mnemonic for the order of star temperatures)
OBAFGKMOnly Bad Astronomers Forget Generally Known Mnemonics (mnemonic for the order of star temperatures)
OBAFGKMOfficially, Bill Always Felt Guilty Kissing Monica (mnemonic for the order of star temperatures)
References in periodicals archive ?
Author's Note: These three classes of stars aren't included because their compositions are significantly different than those in the OBAFGKM sequence.
The color-difference rating is the number of letters between stars on the well-known OBAFGKM scale of spectral classification.
For more than a century, the familiar spectral sequence OBAFGKM has stood firm.