FreeLists / az-observing / [AZ-Observing] Another Joe Orman Moment?

[Tom Polakis <polakis@xxxxxxxx>]

This is from Alister Ling in Edmonton.  If anybody is going to be up early
Sunday, it might be worth a shot.  Dig up your polarizing sunglasses.

Tom

-------------

>From: watcher@xxxxxxxxxxxxxxxxxxxxxx
>Subject: [amastro] Daylight Jupiter details...
>
>Folks,
>
>'tis the season once again to observe Jupiter in daylight, and as an added
>bonus, Sirius is in perfect position too. Many observers will be able to
>see both naked eye well after sunrise (this is a morning activity).
>
>On October 7, Jupiter lies 90 degrees away from the sun. What's special
>about that? It also happens to be where the daytime sky is at maximum
>polarization, its darkest. A week on either side is quite good too.
>
>You can artificially darken the sky even more than its natural state by
>using a yellow filter to subdue the blue component. Additional contrast
>can be had by using a polarizing filter. I've never tried both since I
>don't have a yellow filter, but it's worth experimenting.
>
>The simplest way to find Jupiter and Sirius naked eye is to follow them
>from the dawn. Binoculars are always useful in case you have a little
>trouble locating them. 
>
>It bears repeating (twice a year) that the challenge is easiest when you
>have those "oh so nice" deep blue skies. Hazy or polluted skies (more
>frequent out east and especially in summer) will ruin your chances. The
>morning after a good night's rain will deliver the cleanest most
>transparent air (as long as you're not fogged in!).
>
>I enjoy playing games with the sky by using my polarized sunglasses. With
>my back to the sun, I simply look up and see the dark polarization band.
>To see the band lower in the sky you have to tilt your head quite a bit,
>so a handheld camera or eyepiece polarizer filter can save some strain. By
>rotating the filter back and forth, I can easily make Jupiter or Sirius
>appear or disappear. It's fun watching them pop out of the background into
>visibility!
>
>A couple of special dates to mark on the calendar are Tuesday-Wednesday
>October 9-10th. That's when the last quarter moon is quite close to
>Jupiter. This year on the 9th, for western hemisphere observers, Jupiter
>is a bit more than 5 degrees left (east) of the moon, in the 8:30 position
>when you think of the terminator as 6 and 12 o'clock.
>For Hawaiian observers, the separation will be closer to 3 degrees. For
>those in the Eastern hemisphere, you'll see a near graze of Jupiter just
>below the moon on the morning of the 10th.
>
>On the morning of the 10th in the western hemisphere, Jupiter will be a
>bit more than 7 degrees to the right (west) of the moon in the 4 o'clock
>position with respect to the terminator.
>
>Another way of finding Jupiter or Sirius during the day without getting up
>at dawn, is to first find an object at night with the same declination.
>Then note where it is relative to your observing spot and a tall object
>like a tree top or antenna on a building. Return the next day a suitable
>number of hours later and Jupiter or Sirius will be at the same spot.
>
>For example, Sirius' RA and Dec are 06h 46m and -16 40. Eta Ophiuchi
>(lower left star of Ophiuchus) is at - 15 40 and 17h 10m. So find Eta
>Ophiuchi about an hour after sunset and note its position relative to
>something. Come back and stand in exactly the same spot 13h 38 minutes
>(13h 36m sidereal) later, and look 1 degree south. 
>
>Jupiter's RA and Dec are 07h 05m +22 34'. M27's coordinates are 20h 0m
>+22 43' (rounding). Again, note where the M27 is, and come back 11h 7 min
>later to find Jupiter in pretty much the same spot. I would advise you to
>write down the places where you need to place your feet, and what
>terrestrial object will be your marker. At least I'm likely to forget or
>get them confused.
>
>Good observing!
>Alister.
>
>...............................................................
>Alister Ling  watcher@xxxxxxxxxxxxxxxxxxxxxx
>...............................................................
>**********************************************************
>
>Wherein the deep night sky
>The stars lie in its embrace
>The courtyard still in its sleep
>And peace comes over your face
>                                  Loreena McKennitt
>
>***********************************************************


---

Tom Polakis
Tempe, AZ
Arizona Sky Pages
http://www.psiaz.com/polakis/
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Would you be interested in three CAP Launch Teams and two BSA Launch
Teams, about 25 people?  bout half the teams are trained SAR and First
Responders.  The ages range from 15 - 50.  Everyone understands the
nuances of outdoor activities.

Steve Miller

On Fri, 05 October 2001, "Chris Crawford" wrote:

> 
> I write to recruit observers for my multi-observer project in Arizona. We
> have a good site, about 25 miles SSE of Yucca, perhaps a little too remote
> -- we have to use Ham radio to report our real-time results over the
> Internet to the NASA site. The experiment compiles and cross-correlates the
> observations of 28 observers looking at different parts of the sky. They
> will use keypads to report their observations to the computer. This will not
> be difficult to do in the dark because the keypads are used primarily for
> positional data: the "5" key represents the center of the observer's field
> of view, and the surrounding keys represent the surrounding octants. I will
> even be able to accept magnitude entries, but entering such data is optional
> for the observer. 
> 

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