NGC 2419又稱「星系浪子」,是天貓座最有名的深空天體,估計位於銀河系以外,離地27.5至30萬光年,是已知距離非常遙遠的球狀星團,很可能以非常扁平的橢圓軌道圍銀河系旋轉[29]。NGC 2419是夏普力二型星團,亮度10.3視星等,表明星團質量基本集中在中心位置。人類曾誤以為NGC 2419是恆星,後經美國天文學家卡爾·蘭普蘭(Carl Lampland)的發現糾正[30]。
NGC 2537又稱熊掌系,在上台增四西北偏北約三度[31],是距地球1700至3000萬光年的藍色緻密矮星系。NGC 2537附近的IC 2233螺旋星系非常扁平且薄,離地2600至4000萬光年。IC 2233頗為寧靜,平均每20年形成的恆星還不足一顆,人類曾長期誤以為該系與熊掌系相互影響,但甚大天線陣的觀測數據基本排除上述可能,兩星系距離相當遙遠。[32]
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