I don't think TON 618 is a random name, but rather a composition of category name and a number.

But when I tried to google it, any article about TON 618 did not contain anything about its name origin and nor did lists about astronomy acronyms contained the term TON.

Even if I am wrong about the composition of category name with a number, I still cannot find any information about origin of its name.

So please, can anyone tell me how TON 618 got its name?


Tonantzitla Observatory. See https://en.wikipedia.org/wiki/TON_618 and https://en.wikipedia.org/wiki/Tonantzintla_Observatory

  • $\begingroup$ Oh, thanks, I am an idiot, when I skimmed the article on wikipedia, I did not make that connection. $\endgroup$
    – TStancek
    Oct 2 '21 at 21:21
  • 1
    $\begingroup$ It’s not being an idiot; it’s a moment of lacking attention… Everyone has one of them once in a while… $\endgroup$ Oct 2 '21 at 23:05

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