Based on recessional velocity of 2825 km/sec, about 125 million light years away, in good agreement with redshift-independent distance estimates of 100 to 145 million light years. Given that and apparent size of 2.8 by 2.0 arcmins, about 100 thousand light years in diameter.

Per Dreyer, NGC 3279 (= Todd (#30), 1860 10 25 30 (approx), NPD 78 04) is "faint, much extended". Per Dreyer, IC 622 (= Swift IX (#23), 1860 RA 10 27 10, NPD 78 04.7) is "very faint, pretty small, extended, 9th magnitude star to south" (this is an error, as the 9th-magnitude star is to the north). This suggests that Steinicke's 2011 database listing Todd as the discoverer of IC 622, although correct since it is identifical to NGC 3279, is misleading in terms of the original historical data. Note: Corwin has a detailed discussion of the identity. Thomson also does, which is where the listing number for Swift comes from.

The second IC lists a corrected position (per Howe) of RA 10 25 50, NPD 101 55.0; it also contains a note for NGC 3295, declaring its identity with NGC 3280.

Used in the Arp Atlas as an example of a spiral galaxy with small bright companions. Based on recessional velocity of 10575 km/sec, about 470 million light years away. Given that and apparent size of 1.0 by 0.5 arcmin, about 140 thousand light years across.