Comet 45P Honda-Mrkos-Pajdusakova (3a)

Eventually I managed to stack frames by the comet (see link).
Two stacking modes were used: "average" (right image) and "sigma-clipping" to reduce stars brightness. Comet's tail is clearly seen.
Size of each image: 3x3 degrees.
2015-02-25; 23:04-23:55(UT+2)

An animation of a proper motion of the comet.
2015-02-25; 23:07-23:52(UT+2)

Comet 45P Honda-Mrkos-Pajdusakova (3)

Last night: 2017-02-25 23:05-23:55(UT+2)

Kyiv, Osokorky

Setup: Canon EOS 600D with Jupiter 37А lens [135mm] @f/5 on EQ-5 motorized mount.
42x60s frames.

Processing: DSS+FITStacker+RawTherapee.

Because the comet was too dim, I could not make alignment by the comet so alignment by stars was used. This caused distortion of the comet visible nucleus.

Crop 3x3 degrees

Venus

Venus on 19th of February 2017: Canon EOS 600D through SW 15075 OTAW + SW EQ5 motorized.

A visible angular diameter of the planet now is ~41 arcseconds, it is approximately 2% of visible Moon diameter.

Processing: PIPP+Autostakkert+Registax+GIMP; 25% of 1951 frames (movie taken at ISO400; 1/250s exposure)

Canon EOS 600D through SkyWatcher 15075 + Barlow 5x (Delta Optical)

The same picture with depicted planet's limb: