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| subject: | Venus transit 1/ 3 |
VENUS ON THE SUN
--------------
John Pazmino
NYSkies
john.pazmino{at}moondog.com
2004 June 11
Introduction
----------
I hoped to see this transit since my early days in the profession.
From accounts of the 18th and 19th century instances, it was no
question that I should do everything possible to witness the next one
on 2004 June 8.
Inquiries last year for a trip to Europe to see the transit turned
up nothing that grabbed me. By year end 2003 I designed to watch it
from some where in New York City. The 1-1/2 hour duration here, from
sunrise thru fourth contact, would be enough of a show for me.
Central Park?
-----------
One obvious place to view the transit from was an elevated spot in
Central Park. Altho the park is ringed by towers, making it a 'basin'
in the middle of Manhattan, there are long low sightlines to the
northeast horizon from within it. Discussions with the NYC Urban Park
Rangers gravitated toward the terrace of Belvedere Castle. This
edifice is on a hill looking over all intervening trees and park
structures. The towers beyond on Fifth Av would block the geometric
sunrise, but the Sun would clear their tops after a few minutes.
In mid May 2004 the Rangers had to call off the Belvedere Castle
project. The corps was getting extra busy with other park functions.
The approaching summer season was bringing increased demand for its
services. Oh, I could use the Castle grounds by myself; there just
would be formal R anger event for the transit.
Carl Schurz Park?
---------------
Paralleling the plans for Central Park, many city astronomers,
singly or in groups, were scheming to view from Carl Schurz Park. This
is a promenade along the East River flank of Manhattan in the Upper
East Side. It's really the roof of a 6-lane highway, FDR Drive,
skirting the riverfront. Carl Schurz Park offers a clear view to the
northeast horizon over East River.
Plotting sightlines on street maps revealed that the Sun would
rise thru the cables of Triboro Bridge! What a photo that would make!
A flurry of other suggested sites came along in the weeks before
the transit, some actually quite promising. The gotcha for me was that
from my home in Brooklyn, all were a nasty ride away during owl hours.
In the end, I figured that if I had to travel for any place, I should
go where the main crowd of astronomers were going, Carl Schurz Park.
Weather forecasts
---------------
The weather in New York in June can be just about anything from a
raw chill to stormy rains to blistering heat. The prospects for that
June 8th were so-so: warm, humid, hazy. Not so much cloud but a thick
haze that would blunt the sunrays visually, yet leave them burning by
heat. All in all, the forecasts warned that the Sun may be smothered
in haze or heavily filtered into a red ball at his rising. Despite the
possibility of losing the sunrise, the reports assured that after a
while the Sun would climb out of this haze into clear sky,
No one asserted that the transit would be clouded out from the
City and surrounds. And no rain was seen for the night before.
Personally, I feared a waterfront site for possible sea fog. Such
fog completely blocks the Sun. Normally this is of little concern, fir
it burns off a couple hours after sunrise. A 'couple hours after
sunrise' means losing the whole transit!
My mind is made up
----------------
The previous weekend I prepared my gear for Carl Schurz Park. I
needed a long telephoto lens, camera body, tripod, accessories, solar
filters. I chose my Vivitar solid-cat 800m f11 lens for being a nice
long focal length, yet compact and sturdy. It also avoided focus
problems because it had a definite infinity mark which by experience I
knew was accurate.
This lens is a brother of Vivitar's fabled 600mm f8 model, one of
which I lost in the great Eclipse Theft of 2003 November 8. Altho I
since then obtained a replacement, I picked the 800mm jobbie to get a
bigger prime focal image of the Sun. There is no corona or other off-
disc features to worry about, like there are for a solar eclipse. The
solar filter for the 600mm lens fits this longer lens, the two having
identical fuselages.
The camera body was a Miranda model G, with a clear nondiffusing
screen, critical focuser, and cable release. My TiltAll Jr tripod
supported this rig.
I tossed in a few computer mouse pads. These I would place under
the tripod feet to damp vibrations. The promenade is a thin shell deck
roofing a busy highway.
I went to bed early on Monday night, the 7th, with the intent to
set off for the Park regardless of weather, save for actual heavy
Continued in next message.
---
þ RoseReader 2.52á P005004
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