NGC 4136 is a barred spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 893±20 km/s, which corresponds to a Hubble distance of 43.0 ± 3.2 Mly (13.17 ± 0.97 Mpc). Additionally, seven non-redshift measurements give a distance of 37.53 ± 4.85 Mly (11.506 ± 1.488 Mpc). It was discovered by German-British astronomer William Herschel on 13 March 1785.
Morphology
Eskridge, Frogel, and Pogge published a paper in 2002 describing the morphology of 205 closely spaced spiral or lenticular galaxies. The observations were made in the H-band of the infrared and in the B-band (blue). Eskridge and colleagues described NGC 4136 as follows:
Small, centrally condensed bulge, threaded by a short, thick bar. Bar ends on a full, high-contrast inner ring. The major axis of the ring is nearly orthogonal to that of the bar. Two open, LSB [Low Surface Brightness] spiral arms emerge from the major axis ends of the ring and can be traced through ~120° before fading. The south arm is fainter than the north arm. Most of the bright knots are associated with the interarm disk...We classify NGC 4136 substantially earlier in the H band because the outer, open spiral arms are very faint in the near-IR, leaving the inner arm/ring structure as the spiral feature that dominates the classification.
NGC 4274 Group
Supernova
One supernova has been observed in NGC 4136: SN 1941C (type unknown, mag. 16.8) was discovered by Rebecca B. Jones on 16 April 1941.
