A new optical spectrum of the post-AGB star V1648 Aql reveals separate atmospheric, circumstellar, and interstellar velocity components and supports a high luminosity with a lower distance limit of 1.8 kiloparsecs.
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Optical spectrum of distant OH/IR star V1648 Aql (IRAS 19386+0155)
A new optical spectrum of the post-AGB star V1648 Aql reveals separate atmospheric, circumstellar, and interstellar velocity components and supports a high luminosity with a lower distance limit of 1.8 kiloparsecs.