The nebula N103B in the Large Magellanic Cloud consists of a previously identified small diameter supernova remnant (SNR) on its northeastern edge and a bright eastern arc with a fainter western shell together covering a total of about 8 × 5′ at the canonical distance of 50 kpc. The latter also has a nonthermal radio spectrum and is apparently another SNR. I propose that the small bright northeastern SNR be renamed N103B-NE and the newly identified large SNR be called N103B-extended.

中文翻译：

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LMC中的N103B星云包含两个超新星遗迹的一部分

大麦哲伦星云中的N103B星云由先前确定的东北边缘小直径超新星遗迹（SNR）和明亮的东方弧和较弱的西方壳组成，在标准距离50时总共覆盖了约8×5′ kpc。后者也具有非热无线电频谱，并且显然是另一个SNR。我建议将较小的东北明亮SNR重命名为N103B-NE，将新确定的较大SNR称为N103B扩展。