Showing posts with label Honda-Mrkos-Pajdusakova. Show all posts
Showing posts with label Honda-Mrkos-Pajdusakova. Show all posts

Tuesday, February 28, 2017

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)

Sunday, February 26, 2017

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

Wednesday, January 4, 2017

Comet 45P Honda-Mrkos-Pajdusakova (2)

The next chance to catch the comet occurred on 2nd of January. Despite a weather forecast, the sky was clear.

During the session, the comet was very close to the horizon (~8 degrees).

I used Canon EOS 600D + EF 50mm f/1.8 @f/2.5 on tripod (through open window), ISO=400.

Here is a result of stacking of 77 frames (3.2s each) in Deep Sky Stacker (19 darks and 19 offsets were used for calibration) with subsequent processing in FITStacker and RawTherapee.

A size of the visible field is 4x4 degrees.

The comet is in the center like a green star. A faint star near the comet to the upper-left has a visible magnitude 9.6m.

Date/Time: 2017-01-02 17:27-17:41 (UT+2)
Place: Kyiv


Location (by nova.astrometry.net):

Friday, December 30, 2016

Comet 45P Honda-Mrkos-Pajdusakova

Last evening I caught a comet 45P (Honda-Mrkos-Pajdusakova) near the horizon (altitude <10 degrees).
It seems that comet's magnitude is about 7.5m.


Date/Time: 2016-12-30 ~17:23(UT+2)
Place: Kyiv
Crop 5x5 degrees
Canon EOS 600D + EF 50mm F/1.8 @2.5; 10 frames by 2s, ISO=800; Processed in DSS[20 offsets, 20 darks] + FITSwork4

Annotated picture (by nova.astrometry.net):