Re: observing near the ocean
- --- In email@example.com, "Harold Newton" <hal.newton@i...>
> To be honest, salt doesn't evaporate with the water, so unlessHal,
> you're getting salt spray, I wouldn't think that there is much if
> any salt getting to your scope. If the weather is bad enough to
> cause breaking waves and salt spray, I doubt that you'd be there
> Just my pennies,
Your water over there must have different salt in it to mine. (non
corrosive salt water ?) All of the exterior metal fittings on my
house are covered in salt corrosion yet I am too far from the salt
water lake to get direct spray ? Over 50 metres with 3 rows of trees
in the way. BTW the waves on the lake don't break so there is not
much spray anyway. Could it be that it is very hot down here at the
moment, over 100 deg F. ?
- Interesting discussion!
Perhaps the darkest area in the eastern US (at least, according to
P.Cinzano's light pollution map) is along undeveloped portions of the
Outer Banks. This is the only place (in US) east of central Nebraska
where you can get to a "Black" area on the Bortle scale without a
I've often thought about taking my scope out there but have hesitated
due to concern over salt "in the air." My recollection of past trips
to the beach was that I spent lots of time cleaning a greasy film off
of house / car windows. OTOH, perhaps Hal was right... this may just
be the result sustained winds carrying the ocean spray. Since I'd be
camping, there's the additional concern of keeping sand away from my
Anyway, just a word of advice to those who might be thinking about
observing at the Outer Banks: Pick your times carefully. Aside from
the wind, you should avoid the summer (mosquitos are horrible,
tourists are worse, and the haze, well, we all know what summertime
haze does to transparency!). There's a campground near the Hatteras
lighthouse, but it's currently closed (Hurricane Isabel damage).
--- In firstname.lastname@example.org, Derek Jakoboski wrote:
> Hi. I go to cape cod every summer, a few times every summer,
actually, and naturally, my telescope comes along....anyway, I do
alot of observing near the ocean. I usually set up in the parking
lots on top of the dunes because you can see all the way down the
horizon looking out over the ocean with miniaml rising heat
interferance. But i'm thinking this might not be such a good idea.
Would the salty air near the ocean wreck my telescope? I thinking it
might put a light layer of salt on the mirror, and salt, being
corrosive, would not be good for the coating. Or for the other moving
part of the telescope. Is it bad to observe near the ocean?
- Here at Huntington Beach, California it's never very hot nor very cold
and only one or two mosquitos in the worst nights. Dark skies to the
South and Southwest and stars usually do not "twinkle." Close double/
multiple stars are quite easy to split but my f4.1 16-inch Newtonian
I can hear the surf most nights because I live in a housing tract less
than one-quarter mile from the surf line.
I've been studying the Trapezium [M42] in Orion this Fall/Winter
using, among other eyepieces, an I3 Piece [TM]. Using a 5x Multiplier,
the six brightest stars are "solid" and the seventh star is apparent
and the eighth star is apparent but not "solid." But there are other
stars including three other faint pairs imaged in the group. A 2.5x or
5x Powermate or x2 Multiplier makes the I3 Piece [TM] nearly parfocal
with my Nagler/Radian/Panoptic/Wide Field eyepieces.
The telescope is stored vertically with original Lumicon covers on
both ends. If the mirror is dewed the telescope is mounted the next
day in the sun and allowed to dry. One afternoon recently it had not
dried because I was late hanging the telescope and a very hot drier
used to shrink shrink tubing was used from a distance to flow warm air
up the tube and the moisture was gone in about 15 minutes.
I thought I was washing the mirror too frequently so it gets washed
about once a year when it's been used. We go to a b&b near Mt. Palomar
for a few nights once a month and look through Michael Leigh's
Observer's Inn telescopes -- his b&b was destroyed in the fires near
Julian but the observatory is still intact.