A Washington Post article about why we should make the effort -- clearly ghost-written by Tony.
You will have totality for a few seconds (more if a little farther into totality), but it's not that predictable based upon lunar limb profile. If there is a deep lunar valley the southern limit line might be farther north than a crude calculation would indicate.Tony... if you are just barely within the 100% zone, what do you see?
I suspect that anyone who's aware of the points in the Washington Post article and cares that it's not totality (eclipse geeks like you) will go elsewhere to view it.I advised you back in November to get them to nix that potentially embarrassing idea.
That's exactly my point. Most people don't know those details. Specifically:I suspect that anyone who's aware of the points in the Washington Post article and cares that it's not totality (eclipse geeks like you) will go elsewhere to view it.
People who think a 99% eclipse will get you 99% of the experience will be susceptible to Gore's promotion.The full scientific explanation from astrophysics professor Jay Pasachoff:
Since the sun is about 400,000 times brighter than the full moon (about 14 magnitudes), a 99% eclipse (so termed) is about 4,000 times too bright compared with totality, which is about the brightness of the full moon. So a "99% eclipse" is really only 100/400,000 = 1/4,000 = 1/40% of totality = 0.025%.
To connect the dots here, the solar corona during totality is about as bright as a full moon.
I didn't think it was quite that bad, but it's close.t this time of year, I would estimate that that there is no more than a 20 or 25% chance of clear day in the middle of April in upstate New York.
You will be fine if you get up and start driving by dawn, assuming you have a favorable weather forecast for somewhere within easy driving range. The bad traffic in 2017 was mostly after the eclipse when everyone tries to leave at the same time. If you can find somewhere to hang out until late evening or get a hotel room (outside the path so not price gouged), you'll avoid the worst of it.I also worry about the traffic situation.
I looked it up on Xavier Jubier's interactive Google Map. Surprisingly McGill is in totality one minute 12 seconds. But the weather chart above is far more relevant. Surely there are some meteorologists at McGill who will tell you with those climate stats that you should have a car, be ready to get off that island by dawn or over the weekend before and drive somewhere there is a favorable forecast.My daughter, who is a PhD candidate in astrophysics at McGill in Montreal, tells me that they are planning for a huge celebration to watch the eclipse. They have ordered 20,000 "eclipse glasses" to hand out. Although the western (or northern) edge of the zone of totality bisects the city of Montreal, so they will barely be in the totality zone and it will probably last only a minute or so that far from the center.
How accurate are totality-duration predictions?Surprisingly McGill is in totality one minute 12 seconds.
Simple stuff for astrophysics math. They are basically spot on.How accurate are totality-duration predictions?
Very, if you use lunar limb corrections as Xavier does. The lunar limb corrections subtract 10 seconds from McGill's length of totality as it's so close to the edge. Near centerline the difference is typically 1-2 seconds. If you click on a location on Xavier's map, the eclipse circumstances are displayed including length of totality with and without lunar limb correction.How accurate are totality-duration predictions?