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- SN 1998S was a type IIn supernova that was observed in NGC 3877 in March 1998. SN 1998S was the brightest type IIn event observed. It was discovered on 1998 March 2.68 UT in NGC 3877 by Z. Wan at a broadband (unfiltered) optical magnitude of +15.2. Its spectrum showed prominent H and He emission lines with narrow peaks and broad wings, superimposed on a blue continuum. These narrow lines indicate the presence of a dense circumstellar medium (CSM) in the vicinity of the supernova. The high luminosity of SN1998S is due to the interaction of fast material (ejecta) with previously-expelled slowly-expanding material (CSM), which can more effectively convert kinetic energy of ejecta into radiation energy. (en)
- SN 1998S – supernowa typu IIn odkryta 18 marca 1998 roku w galaktyce NGC 3877. Jej maksymalna jasność wynosiła 12,20m. (pl)
- SN 1998S是一颗位于NGC 3877的超新星，它是一颗II型超新星。 (zh)
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- 4065 (xsd:nonNegativeInteger)
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- 0001-03-16 (xsd:gMonthDay)
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- 0001-03-02 (xsd:gMonthDay)
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- SN 1998S, AAVSO 1140+48 (en)
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- maybe Red supergiant (en)
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- SN 1998S – supernowa typu IIn odkryta 18 marca 1998 roku w galaktyce NGC 3877. Jej maksymalna jasność wynosiła 12,20m. (pl)
- SN 1998S是一颗位于NGC 3877的超新星，它是一颗II型超新星。 (zh)
- SN 1998S was a type IIn supernova that was observed in NGC 3877 in March 1998. SN 1998S was the brightest type IIn event observed. It was discovered on 1998 March 2.68 UT in NGC 3877 by Z. Wan at a broadband (unfiltered) optical magnitude of +15.2. (en)
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- SN 1998S (en)
- SN 1998S (pl)
- SN 1998S (zh)
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