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Transit of Mercury

Started by mcneely_dupe_5262, 11/08/2006 05:17PM
Posted 11/08/2006 05:17PM Opening Post
I had my TV-76 out today to observe the transit of Mercury. I used the scope with an 1.25" Herschel wedge and a 9mm Nagler. I had the scope mounted on a CG5 equatorial mount.

The transit started around 2:00 pm from my location in Bremen, Indiana. We had been clouded out all morning, eventually the clouds dissipated a few minutes before the transit.

The scope gave a wonderful view. The sun was a white disk, and there was a huge sunspot that had just moved over from behind the sun.

I had my high school astronomy students with me, and we observed from the school campus. We all had a lot of fun, and many of my students were quite interested in what was going on. I also showed the sun to a few teachers.

Mercury appeared as a perfectly round hole drilled in the sun. It was much smaller in diameter than the June 2004 transit of Venus, but it still was a remarkable sight. The appearance of Mercury was unmistakable, even at low magnifications. The motion of Mercury was easy to discern after just a few minutes of observation.

I also had my Coronado PST set up. I used the PST on my TelePod. The view was terrific, I really love my PST, but with this event I preferred the view through the TV-76. It was crisper, and the white photosphere augmented the stark appearance of Mercury.

In the PST, Mercury began its transit near a small prominence which formed a convenient benchmark for envisioning the apparent path of the planet as it transited.

The view in my TV-76 seemed much better than what I remember of the 1999 transit of Mercury from Arizona. I used a C8 with an off-axis filter back then.

Michael Aaron McNeely
TeleVue Forum Moderator
Posted 11/09/2006 02:32PM #1
I took this image with a TV101 useing a 4X Powermate and a 1 ang. solar spectrum K-line filter.
My TV has been my primary solar scope for over 9 years now.


Attached Image:

WillardB's attachment for post 108955