Tag Archives: diagram

2020 Autumnal (Fall) Equinox In New Hampshire Will Be On Tuesday, September 22, 9:30am (Eastern).

by Anura Guruge


Click pictures to ENLARGE.

Attribution WILL be enforced.


Sunrise & Sunset Times for Concord, New Hampshire around the September Equinox.
(From Time-and-Date).

Note that daylight is NOT exactly 12 hours!
If anything we get closer to 12 hours 3 days later.
There is a reason for that. It is our latitude above the equator.
If we were closer to the equator it would have been closer to 12 hours.
See this explanation in Time-and-Date.


My equinox diagram.

Click to ENLARGE, study and admire.


Another ‘Time-and-Date‘ diagram annotated by I.


Related Posts:
Search on ‘equinox’ for lots of other posts with tons of pictures & diagrams.


by Anura Guruge

2018 Autumnal (Fall) Equinox In New Hampshire Will Be On Saturday, September 22, 9:54pm (Eastern).

by Anura Guruge


Click pictures to ENLARGE.

Attribution WILL be enforced.


Sunrise & Sunset Times for Concord, New Hampshire around the September Equinox.
(From Time-and-Date).

Note that daylight is NOT exactly 12 hours!
If anything we get closer to 12 hours 3 days later.
There is a reason for that. It is our latitude above the equator.
If we were closer to the equator it would have been closer to 12 hours.
See this explanation in Time-and-Date.


My equinox diagram.

Click to ENLARGE, study and admire.


Related Posts:
Search on ‘equinox’ for lots of other posts with tons of pictures & diagrams.


by Anura Guruge

2017 Autumnal (Fall) Equinox In New Hampshire Will Be On Friday, September 22, 4:02pm (Eastern).

by Anura Guruge


Click pictures to ENLARGE.

Attribution WILL be enforced.


Sunrise & Sunset Times for Concord, New Hampshire around the September Equinox.
(From Time-and-Date).

Note that daylight is NOT exactly 12 hours!
If anything we get closer to 12 hours 3 days later.
There is a reason for that. It is our latitude above the equator.
If we were closer to the equator it would have been closer to 12 hours.
See this explanation in Time-and-Date.


My equinox diagram.

Click to ENLARGE, study and admire.


Related Posts:
>>>> 
Search on ‘equinox’ for lots of other posts with tons of pictures & diagrams  —>>>


by Anura Guruge

2016 Autumnal (Fall) Equinox In New Hampshire Will Be On Thursday, September 22, 10:21 am (Eastern).

by Anura Guruge


Click pictures to ENLARGE.

Attribution WILL be enforced.

fallequivnox




Taken with a Nikon P900.


My equinox diagram.

Click to ENLARGE, study and admire.


Related Posts:
>>>> 
Search on ‘equinox’ for lots of other posts with tons of pictures & diagrams  —>>>
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Check Categories ‘Nikon’ for other related posts >>>>


by Anura Guruge

Comet C/2011 L4 (Pan-STARRS): Where To Spot In The Northern Skies.

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by
Anura Guruge


Related posts:
1/ Naked Eye Visible … — Mar. 6, 2013.
2/ Comet First of two BIG 2013 comets: C/2011 L4 (Pan-STARRS)
>>Mar. 5, 2013.


Comet C/2011 L4 (PANSTARRS) will be visible to Northern hemisphere observers near the cresent moon on March 12th. This ‘map’ provided by NASA. Click to ENLARGE.


Another image from NASA, but this seen down-under in Australia. Click to ENLARGE. To see it as they saw it in Oz, you will have to stand on your head or turn your monitor upside down.


Another image, again down under. Now you know the drill. Click to ENLARGE. Somehow rotate the image to get the Australian view.


Perihelion (closest approach to the Sun) is today, March 10, 2013. As it turns around the Sun it also crosses the celestial equator, moving from the southern skies to the ones that really count — the northern skies, i.e., US. People are already seeing it — those close to the equator, such as my brethren in Sri Lanka getting early dibs.

As I have said before March 12 & 13 should be particularly good since the crescent Moon will provide a good reference. Try and get to a high point, like a small hill, so that you can see over trees — if you live in the country.

Enjoy. I will try and keep you posted.

Here are two useful links: NASA & Space Weather.

Comet C/2011 L4 (Pan-STARRS) Should Be Naked Eye Visible March 12 & 13, 2013, At Sunset, Near Crescent Moon.

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by
Anura Guruge


C/2011 L4 (Pan-STARRS) over South Africa — last week.




C/2011 L4 as indicated by its official designation was discovered in 2011, on June 6, 2011.

It was discovered ‘robotically’ [i.e., by automated, computer software scanning digital images] by the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) initiative whose telescopes are located at the summit of Mount Haleakala on Maui, Hawaii. Hence the parenthetical name ‘Pan-STARRS’.

Calling it Comet Pan-STARRS is wrong and meaningless!

The Pan-STARRS program, an automated survey of the sky, discovers comets at a rapid rate. There are many, many comets with the parenthetical name ‘Pan-STARRS’ — this name denoting the discoverer. It is only real and unique name is C/2011 L4. Comet’s can only be named after a person involved with its discovery (or the calculation of its orbit). Comets such as this one, discovered by computer software, are not assigned a name of a person. And NO, you cannot buy its name.

Alas, it won’t be very bright. So, provided we have clear skies, next Tuesday and Wednesday, close to the Moon — around sunset.

Bright Naked Eye Comet, The 1st Of the Two Biggies Of 2013, Will Soon Be Visible Over NH. Comet C/2011 L4 (PANSTARRS).

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by
Anura Guruge



Over Argentina on March 2. Image courtesy Luis Argerich — with Thanks.


Compute orbital diagram from NASA/JPL. Click to ENLARGE.

Compute orbital diagram from NASA/JPL. Click to ENLARGE.


We won’t see it in the Northern Hemisphere until next week. It would, of course, be better with binoculars or a small telescope. It, alas, is not going to be as bright as initially hoped.

But, this is only the teaser, the support act, for the main cometary event of the year — possibly the century. And I am here talking as one that saw and remembered C/1995 O1 (Hale-Bopp) in 1997.

The BIG ONE will be around Thanksgiving/Hanukkah 2013. C/2012 S1 (ISON). That will be a show. Mark my word.


Hale-Bopp c. 1997.


Russian Meteor Fireball Explosion: The Conspiracy Theory. I Think It Was Manmade, Intentional Or Otherwise.

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by
Anura Guruge


Related posts:
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Check Category ‘Astronomy’ in the sidebar trench below >>>

Though many don’t realize this I spent quite a bit of time working on astronomy, these days even at the expense of Popes and cardinals.


Russianmeteor

Click to watch YouTube video.


As I have intimated of late, I have been spending most of time studying and writing about Near Earth Objects (NEOs): asteroids, comets and man made objects [e.g., satellites, spacecraft and debris].

As soon as I saw the news about the Russian meteor a thought crossed my mind. This could have been man made!

Yes, it could have been space debris, probably Russian, given that they were notorious for their littering of space (some due to all of their many spacecrafts that blew up). But, could it have been intentional. A drone? The U.S. checking out Russia’s much speculated space defense.

Bottom line: I am not convinced that this was a chunk of an asteroid or comet. It could have been. Just something tells me that this just didn’t seem right.

Asteroid 2012 DA14 That Will Harmlessly Fly By Earth At A Distance Of 21,200 Miles On Friday, February 15, 2013.

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by
Anura Guruge


Related posts:
++++
Check Category ‘Astronomy’ in the sidebar trench below >>>

Though many don’t realize this I spent quite a bit of time working on astronomy, these days even at the expense of Popes and cardinals.


Artistic rendition of 2012 DA14 passing by Earth on February 15, 2013.


Orbital diagram of the flyby.


This is Way Cool.

A dynamic orbit tracker from NASA’s JPL.
Try it out if you have Java installed.
Click to access JPL. [Orbit diagram], collapsed, will be at the top. You need Java.

Click to access JPL. [Orbit diagram], collapsed, will be at the top. You need Java.


It was discovered last year, on February 23, 2012, by a Spanish observatory.

It is an Earth-crosser asteroid that orbits the Sun every 366.2 days. Since it furthest point from the Sun, aphelion is beyond Earth’s orbit, crosses Earth’s orbital path twice a year. It has been probably been doing this for millions of years, though we now have precise data going back to August 1913.

It is not very big, about 160 ft across and weighing about 180,000 tons. It would do a fair amount of damage if it were to hit the Earth. It will not do so this year! But this is a record close approach. So much so that Earth’s gravity will perturb its orbital path reducing its orbital period by 51 days. That is a big deal.

There is an increasing chance that it might actually get around to hitting the Earth post 2080 — so 67 years from now. So our kids will have to keep an eye out. Asteroids of this size do hit the Earth every 1200 years or so. We are due. DA14 would not be the end of the World. It is too small. It could destroy a city. There was smaller asteroid that entered Earth’s atmosphere, above Russia, in 1908 and exploded in the sky before hitting the ground. It destroyed about 80 million trees over a 830 square mile area,