SN 2019np
supernova in the constellation Leo Minor
SN 2019np was a Type Ia supernova event in NGC 3254, which is an unbarred spiral galaxy in the northern Constellation of Leo Minor. Based on the Tully–Fisher relation, this galaxy is located at a distance of 107.0 ± 22.2 million light-years (32.80 ± 6.8 Mpc) from the Milky Way. This supernova was discovered January 9, 2019 by Kōichi Itagaki, and reached maximum two weeks later. It was the brightest supernova observed in the year 2019.
Observations
This supernova was discovered by Japanese amateur astronomer Kōichi Itagaki on January 9, 2019, using a 0.35-m telescope. The early spectrum was consistent with a Type Ia supernova. On January 11, it was measured at an apparent visual magnitude of 16.68 with an estimated two weeks until maximum. It reached visual magnitude 13.6 at maximum.
The spectral evolution of SN 2019np followed the normal pattern for a Type Ia supernova. The velocity of the ejecta was around 10,200 km/s at maximum, as measured from ionized silicon.
The public source identifies “SN 2019np” as supernova in the constellation Leo Minor. This brief keeps that definition visible, then builds a research path around 2019np, supernova and constellation.
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This entry incorporates text from “SN 2019np” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.