SIMBAD references

1989ATsir1537....9K - Astron. Tsirk., 1537, 9-10 (1989)

An unexpected UBV and spectral behaviour of the planetary nebula IC 4997 = QV Sge in 1985-88.

KOSTYAKOVA E.B.

Journal keyword(s):

Simbad objects: 1

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