{{Infobox galaxy
| image =
| alt = NGC 3998
| caption = SDSS拍摄的NGC 3998
| epoch = J2000
| constellation name = 大熊座
| ra =
| size =
| appmag_v = 12.10
| appmag_b = 11.64
| absmag_v = 2.7′ × 2.3′，距离地球4500万光年。
参考
外部链接
*
{{Infobox galaxy
| image =
| alt = NGC 3998
| caption = SDSS拍摄的NGC 3998
| epoch = J2000
| constellation name = 大熊座
| ra =
| size =
| appmag_v = 12.10
| appmag_b = 11.64
| absmag_v = 2.7′ × 2.3′，距离地球4500万光年。
参考
外部链接
*
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