Ejnar Hertzsprung’s two-letter
abbreviations for the constellations
Reproduced here is Ejnar
Hertzsprung’s list of two-letter constellation
abbreviations, published in 1922 in Annalen
van de Sterrewacht te Leiden vol.
XIV, part 1, p. 22. Hertzsprung used primes and even double
primes to distinguish between constellations with otherwise
identical two-letter symbols. Despite popular misconception,
Hertzsprung was not party to the table of three-letter
abbreviations adopted by the IAU in 1922. His opinion of those
abbreviations can be read here.
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