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Sc(r)II.3 PH-7634-S April 28/29, 1979 103aO 12 min The spiral pattern in NGC 3780 is similar to the multiple arms in the prototype multiple-armed galaxy M101 (Sc; Hubble Atlas, pp. 27, 31; panel 218 here). Both galaxies are later versions of the multiple-armed pattern of NGC 488 (Sab; panels 115, 116, S3, S12). The arms in NGC 3780 are thin but highly branched. Most can be traced as individual fragments for only about a half-rotation. The many individual HII regions are unresolved at the 1" level. The redshift of NGC 3780 is v_o = 2481 km/s. Non-interacting pair with NGC 3804 at 13.5 arcmin SA(s)c: (de Vaucouleurs) Paired with UGC 06640 at 13.2, 108 Small, bright nucleus. Many filamentary, knotty arms. Non-interacting pair with NGC 3804 at 13.5 arcmin. Magnitude: Ap. J., 85, 325, 1937. |