Total Solar eclipse of August 21, 2017

Maybe Mysteryman will host a slumber party on his front lawn for all the A2K sun worshipers.

does the path of totalitytude include Pa? or MAine. Or Delaware? I am so there with donuts

I doubt it if I read this map correctly:

wow, seems that totalitytude goes through Oak Ridge. I am so there with donuts anyway

Well, maybe we'll get a little shade out of it. Better than nothing.

I wonder whether thay have good hotels in Hopkinsville, Kentucky.





David

I can't believe I started planning this back in 2011 and now it's only a year away.

Definitely time to start thinking about a plan for 2017.

Here's a different map of the eclipse's path. I presume that the path looks curved differently from the earlier map because of a different method of map projection.

It might be a bad idea to make plans well in advance of the eclipse for one specific site. If your luck is bad you might end up with thick clouds that day at that site.

Better to be flexible and travel at the last minute to an area where the short-term weather forecast calls for clear skies.

Unless you're the sort of person who travels to every eclipse and can afford to miss one. In my case this might be the only total eclipse I ever see, so I want to make sure that I end up in a spot with clear skies.

It never hurts to plan early. Unfortunately the hardest part is compensating for the weather. I plan on being near the center of the event at the right time, but days or hours before the actual event I need to be ready to travel to the nearest area with a high probability of clear weather. If that whole area of the US is overcast on that day, then I'm just out of luck, which sucks, but there's nothing I can do about it without chartering an airplane or something.

Usually what I do is track the weather a day ahead of time and prepare to drive however many hundreds of miles to be in an area with the best weather prediction. The last time I did this was in Aruba, so there wasn't very far I could go. I was very lucky and there were just a few puffy clouds around and I got a clear view of the eclipse for about 60 seconds or so.

I always seem to get weather near the coast so I think I'd head mid-westish and then start paying close attention to the actual forecast.

That's pretty much my plan. Western Kentucky in August is often dry and sunny, so chances are decent for a good viewing. But we won't know until the last days/hours, which is where travel flexibility comes in .

I think that's where bflynet's comment about mysteryman comes into play

(I'm going to take another look at my FB friends list - I think I have some dance friends in that area that I may try to hit up for some floor/sofa space)

Things to expect for the Eclipse:

http://cs.astronomy.com/asy/b/astronomy/archive/2014/08/05/25-facts-you-should-know-about-the-august-21-2017-total-solar-eclipse.aspx

25 facts you should know about the August 21, 2017, total solar eclipse

Posted by Michael Bakich
on Tuesday, August 05, 2014

As I write this blog, I realize that the event is more than three years away. But it’s going to be so huge that I thought I’d list some of the important details for our readership, the general public, and the media. Hey, it’s never too early for knowledge, right? Anyway, these are the facts.

1. This will be the first total solar eclipse in the continental U.S. in 38 years. The last one occurred February 26, 1979. Unfortunately, not many people saw it because it clipped just five states in the Northwest and the weather for the most part was bleak. Before that one, you have to go back to March 7, 1970.

2. A solar eclipse is a lineup of the Sun, the Moon, and Earth. The Moon, directly between the Sun and Earth, casts a shadow on our planet. If you’re in the dark part of that shadow (the umbra), you’ll see a total eclipse. If you’re in the light part (the penumbra), you’ll see a partial eclipse.

3. A solar eclipse happens at New Moon. The Moon has to be between the Sun and Earth for a solar eclipse to occur. The only lunar phase when that happens is New Moon.

4. Solar eclipses don’t happen at every New Moon. The reason is that the Moon’s orbit tilts 5° to Earth’s orbit around the Sun. Astronomers call the two intersections of these paths nodes. Eclipses only occur when the Sun lies at one node and the Moon is at its New (for solar eclipses) or Full (for lunar eclipses) phase. During most (lunar) months, the Sun lies either above or below one of the nodes, and no eclipse happens.

5. Eclipse totalities are different lengths. The reason the total phases of solar eclipses vary in time is because Earth is not always at the same distance from the Sun and the Moon is not always the same distance from Earth. The Earth-Sun distance varies by 3 percent and the Moon-Earth distance by 12 percent. The result is that the Moon’s apparent diameter can range from 7 percent larger to 10 percent smaller than the Sun.

6. It's all about magnitude and obscuration. Astronomers categorize each solar eclipse in terms of its magnitude and obscuration, and I don’t want you to be confused when you encounter these terms. The magnitude of a solar eclipse is the percent of the Sun’s diameter that the Moon covers during maximum eclipse. The obscuration is the percent of the Sun’s total surface area covered at maximum. Here's an example: If the Moon covers half the Sun's diameter (in this case the magnitude equals 50 percent), the amount of obscuration (the area of the Sun's disk the Moon blots out) will be 39.1 percent.

7. Solar eclipses occur between Saros cycles. Similar solar and lunar eclipses recur every 6,585.3 days (18 years, 11 days, 8 hours). Scientists call this length of time a Saros cycle. Two eclipses separated by one Saros cycle are similar. They occur at the same node, the Moon’s distance from Earth is nearly the same, and they happen at the same time of year.

8. Everyone in the continental U.S. will see at least a partial eclipse. In fact, if you have clear skies on eclipse day, the Moon will cover at least 48 percent of the Sun’s surface. And that’s from the northern tip of Maine.

9. It’s all about totality. Not to cast a shadow on things, but likening a partial eclipse to a total eclipse is like comparing almost dying to dying. I know that 48 percent sounds like a lot. It isn’t. You won’t even notice your surroundings getting dark. And it doesn’t matter whether the partial eclipse above your location is 48, 58, or 98 percent. Only totality reveals the true celestial spectacle: the diamond ring, the Sun’s glorious corona, strange colors in our sky, and seeing stars in the daytime.

10. You want to be on the center line. This probably isn’t a revelation, but the Moon’s shadow is round. If it were square, it wouldn’t matter where you viewed totality. People across its width would experience the same duration of darkness. The shadow is round, however, so the longest eclipse occurs at its center line because that’s where you’ll experience the Moon’s shadow’s full width.

11. First contact is in Oregon. If you want to be the first person to experience totality in the continental U.S., be on the waterfront at Government Point, Oregon, at 10:15:56.5 a.m. PDT. There, the total phase lasts 1 minute, 58.5 seconds.

12. The center line crosses through 10 states. After a great west-to-east path across Oregon, the center line takes roughly nine minutes to cross a wide swath of Idaho, entering the western part of the state just before 11:25 a.m. MDT and leaving just before 11:37 a.m. MDT. Next up is Wyoming, where the umbral center line dwells until just past 11:49 a.m. MDT. The center line hits the very northeastern part of Kansas at 1:04 p.m. CDT and enters Missouri a scant two minutes later. At 1:19, the shadow’s midpoint crosses the Mississippi River, which at that location is the state border with Illinois. The center line leaves Illinois at its Ohio River border with Kentucky just past 1:24 p.m. CDT. Totality for that state starts there two minutes earlier and lasts until nearly 1:29 p.m. CDT. The center line crosses the border into Tennessee around 1:26 p.m. CDT. Then, just past the midpoint of that state, the time zone changes to Eastern. The very northeastern tip of Georgia encounters the center line from just past 2:35 p.m. EDT until not quite 2:39 p.m. EDT. Finally, it’s South Carolina’s turn. The last of the states the center line crosses sees its duration from 2:36 p.m. EDT to 2:39 p.m. EDT. One further note: The extreme northeast part of Georgia does experience some totality, but at no point does the center line pass through that state.

13. Totality lasts a maximum of 2 minutes and 40.2 seconds. That’s it. To experience that length, you’ll need to be slightly south of Carbondale, Illinois, in Giant City State Park. You might think about getting there early.

14. The end of the eclipse for the U.S. is not on land. The center line’s last contact with the U.S. occurs at the Atlantic Ocean’s edge just southeast of Key Bay, South Carolina. I’m pretty sure the crowd won’t be huge there.

15. Cool things are afoot before and after totality. Although the big payoff is the exact lineup of the Sun, the Moon, and your location, keep your eyes open during the partial phases that lead up to and follow it. As you view the beginning through a safe solar filter, the universe will set your mind at ease when you see the Moon take the first notch out of the Sun’s disk. Around the three-quarters mark, you’ll start to notice that shadows are getting sharper. The reason is that the Sun’s disk is shrinking, literally approaching a point, and a smaller light source produces better-defined shadows. At about 85 percent coverage, someone you’re with will see Venus 34° west-northwest of the Sun. If any trees live at your site, you may see their leaves act like pinhole cameras as hundreds of crescent Suns appear in their shadows.

16. This eclipse will be the most-viewed ever. I base this proclamation on four factors: 1) the attention it will get from the media; 2) the superb coverage of the highway system in our country; 3) the typical weather on that date; and 4) the vast number of people who will have access to it from nearby large cities.

17. Only one large city has a great view. Congratulations if you’re one of the 609,000 people lucky enough to live in Nashville. The city center and parts north of it will experience 2+ minutes of totality. Unfortunately, that’s the only large city with a great view. In the tally below, column 1 lists 25 other large metropolitan areas. The second column shows the amount of the Sun’s surface the Moon will cover as seen by viewers in each city.

Atlanta 97 percent
Boston 63 percent
Chicago 87 percent
Cincinnati 91 percent
Dallas 76 percent
Denver 92 percent
Detroit 79 percent
Houston 67 percent
Indianapolis 91 percent
Las Vegas 72 percent
Los Angeles 62 percent
Memphis 93 percent
Miami 78 percent
Milwaukee 83 percent
Minneapolis 83 percent
New Orleans 75 percent
New York City 72 percent
Oklahoma City 84 percent
Philadelphia 75 percent
Phoenix 63 percent
Pittsburgh 81 percent
Portland 99 percent
Salt Lake City 91 percent
Seattle 92 percent
Washington, D.C. 81 percent

18. A few small cities are well-placed. Here’s a list of smaller municipalities either on the center line or near it with their approximate populations.

Carbondale, Illinois 26,000
Casper, Wyoming 58,000
Columbia, Missouri 113,000
Columbia, South Carolina 132,000
Grand Island, Nebraska 50,000
Greenville, South Carolina 61,000
Hopkinsville, Kentucky 33,000
Idaho Falls, Idaho 58,000
Jefferson City, Missouri 43,000
Paducah, Kentucky 25,000
Saint Joseph, Missouri 77,000
Salem, Oregon 157,000

19. Totality is safe to look at. During the time the Moon’s disk covers that of the Sun, it’s safe to look at the eclipse. In fact, to experience the awesomeness of the event, you must look at the Sun without a filter during totality.

20. Yes, the Sun’s a lot bigger. Our daytime star’s diameter is approximately 400 times larger than that of the Moon. What a coincidence that it also lies roughly 400 times farther away. This means both disks appear to be the same size.

21. You won’t need a telescope. One of the great things about the total phase of a solar eclipse is that it looks best to naked eyes. The sight of the corona surrounding the Moon’s black disk in a darkened sky is unforgettable. That said, binoculars give you a close-up view — but still at relatively low power — that you should take advantage of several times during the event.

22. Nature will take heed. Depending on your surroundings, as totality nears you may experience strange things. Look. You’ll notice a resemblance to the onset of night, though not exactly. Areas much lighter than the sky near the Sun lie all around the horizon. Shadows look different. Listen. Usually, any breeze will dissipate and birds (many of whom will come in to roost) will stop chirping. It is quiet. Feel. A 10°–15° F drop in temperature is not unusual.

23. Maximum totality is not the longest possible in 2017. The longest possible duration of the total phase of a solar eclipse is 7 minutes and 32 seconds. Unfortunately, the next solar eclipse whose totality approaches 7 minutes won’t occur until June 13, 2132. Its 6 minutes and 55 seconds of totality will be the longest since the 7 minutes and 4 seconds of totality June 30, 1973.

24. The future is bright but long. The next total solar eclipse over the continental U.S. occurs April 8, 2024. It’s a good one, too. Depending on where you are (on the center line), the duration of totality lasts at least 3 minutes and 22 seconds on the east coast of Maine and stretches to 4 minutes and 27 seconds in southwestern Texas. After that eclipse, it’s a 20-year wait until August 23, 2044 (and, similar to the 1979 event, that one is visible only in Montana and North Dakota). Total solar eclipses follow in 2045 and 2078.

25. This event will happen! As astronomers (professional or amateur), some of the problems we have are due to the uncertainty and limited visibility of some celestial events. Comets may appear bright if their compositions are just so. Meteor showers might reach storm levels if we pass through a thick part of the stream. (Oh, and the best views are after midnight.) A supernova as bright as a whole galaxy is visible now, but you need a telescope to view it. In contrast, this solar eclipse will occur when we say, where we say, for how long we say, and in the daytime, no less. Guaranteed!

We have a spot picked out. Turns out I had a great aunt who owned a property just about dead center to the track. The property is abandoned but still owned by other relatives. There are two large fields in the back 40 behind the old house. I think we'll set up our viewing party there. Is anyone else from A2K planning on being in that area (near Paducah KY)? If I can confirm that we have permission to be on the property I may ask if I can extend the invitation to anyone else in the area.

Still following with great interest. It's a big birthday year for me and my best friend from high school next year. We've had some minor discussions on a little Prius road trip for this.