Tag Archives: Sun

Mercury, Atypically Visible This Week, Is Supposedly Sporting A Comet-Like Tail.

by Anura Guruge


To access above ‘cincinnati.com article click here.


Click to ENLARGE. From ‘timeanddate.com’ ‘Sky Map’. Link: timeanddate.com/astronomy/night/

Mercury, however, is NOT a comet. It is beyond unlikely that it contains any frozen volatiles. It has been too close to the Sun for way, way too long. So, this tail has to be dust being blown away from its surface by Solar winds. Neat. Mercury, at best, naked eye, is but a small, faint spec. A dot. Very unlikely you would see this tail naked eye. But, try to get a gander. The above map should help.


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by Anura Guruge


ANOTHER Naked Eye Visible Comet Ahead Of Christmas 2018? C/2018 V1 (Machholz-Fujikawa-Iwamoto).

by Anura Guruge


Click to ENLARGE.


Comet C/2018 V1 ( Machholz-Fujikawa-Iwamoto )

Discovered: November 7, 2018 (yes, just last week).

Discoverers: One is Arizona (Donald E. Machholz, Jr.) & two in Japan (Shigehisa Fujikawa & Masayuki Iwamoto). You can find more here. Hence the name which credits all three.


C/2018 V1 is much more of a CLASSIC comet than our current ‘Christmas Comet of 2018‘, i.e., 46P/Wirtanen. That is why it has a ‘C/’ designation while the other is a ‘P/’. The ‘P/’ denotes that 46P/Wirtanen is a PERIODIC comet — one that swings around the sun on a regular basis (like a commuter). The ‘C/’, on the other hand, means that is a NON-PERIODIC. It means that this comet has not been previously seen in the last 200-years. Typically it means that it is a FIRST TIME visitor from far, far out in the Solar System, ideally from the Oort Cloud, the incubator of most comets at the very edge of our Solar System.

So, we are assuming it is a FRESH comet, with a lot of frozen matter that will sublimate as the comet gets closer and closer to the Sun. That is what makes it visible, gives it a tail and with luck makes it spectacular. Right now it is touch and go. Viewed through a powerful telescope you can already see a blue tail — that color indicating the presence of ionized Carbon Monoxide (CO+).

On Tuesday, November 27, 2018 it will be at its closest to Earth — 62 million miles. Comet ISON (C/2012 S1) that could have been the GREAT COMET of 2013 would have been 40 million miles. So, C/2018 V1 will be 22 million miles further out. BUT, unlike ISON it will make it around the Sun. That is a given. It is NOT a sungrazer. Actually it doesn’t get very close to the Sun! As you can see from the above diagram it does not even cross Mercury’s orbit.

Right now it is BORDERLINE — but shows more promise than 46P.

I will keep you posted. This was a BIG heads up.


Comet ISON IF it had rounded the Sun — rather than getting FRIED by it, because it went so close.



46P/Wirtanen


Click to ENLARGE and admire. From the JPL Small-Body Database Browser.


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by Anura Guruge

July 11, 2018, In New Hampshire, By A Lake.

by Anura Guruge


NO post-processing whatsoever.

Click pictures to ENLARGE.

Attribution WILL be enforced.


It has been quite the Summer up here in New Hampshire. We, as usual, went down to our beach (slightly late) around 6:15pm. We rarely go earlier. It is too hot and ‘non-peaceful’. I did my usual swim to the swim platform and back. [You can just about see it, way to the right, in line with the furthest boat — in the ‘black’ slick of calmer water.] By 6:45pm everybody was GONE. Just us. I read a bit. Took a quick snooze in the heat. Then I picked up my camera and looked through the lens. This is what I got — yes, albeit, after I kicked down the exposure compensation a few notches. This to I captures what Summer in New Hampshire Lakes Region is all about.


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by Anura Guruge

To My Fellow, Born Again, Sun Worshippers — Sol Invictus, Indomitable Is Melting The Winter Away.

by Anura Guruge


Click pictures to ENLARGE.

Attribution WILL be enforced.


Exactly 26-days away from the Spring Equinox.

March 20, 2017 6:28am Eastern.


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by Anura Guruge

To My Fellow, Born Again, Sun Worshippers — Sol Invictus, Indomitable.

by Anura Guruge


Click pictures to ENLARGE.

Attribution WILL be enforced.


Exactly 30-days away from the Spring Equinox.

March 20, 2017 6:28am Eastern.


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by Anura Guruge

More Bad News From Nikon Might Signal A Much-Needed Re-Trenching/Consolidation Of The Digital Camera Market.

by Anura Guruge


Another BAD NEWS Press Release
from Nikon on February 13, 2017.

nikonbad

Click to ENLARGE. You can find original Press Release at Nikon.com.


This Press Release right on the heels of the one that
the much anticipated 1″ DL compacts have been cancelled.


Mobile phones with high-quality camera capability have been steadily eating into digital camera sales for the last few years.

It is finally beginning to take a heavy toll. Nikon could be the first to stumble.

Nikon currently, per DPReview, has 250 cameras on its books. That is crazy.

Canon has 278, Sony 277, Olympus 243, Fujifilm 239, Panasonic 193 and Pentax 135.

That is a total of 1,615 digital cameras from 7 camera manufacturers — at an average of 230 per vendor.

I have consistently maintained that this is too many. Each camera that you keep on your books costs money.

Nikon announced 14 new cameras in 2016 — 3 of them being the 1″ DL compacts that were cancelled yesterday.

Nikon and the others MUST cut back on new releases. We do NOT need so many variants at so many different price points.

Just a couple of good ones, at the low, medium and high bands.

The camera industry has ALREADY seen a sea change in vendors. Kodak, Polaroid and Agfa are no longer the market leaders they one were.

We have seen such dramatic shifts in leadership in the computer industry. Once famous names, now no more; e.g., NCR, Burroughs, CDC, Univac, DEC, DG, Wang, Stratus, Sun etc. etc.

The same WILL happen to these digital camera vendors. Mark my word.


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by Anura Guruge

How & Where To See Comet, 45P, February 9 – 12, 2017, As It Makes Close Approach.

by Anura Guruge


Click to ENLARGE.

Comet P45 where to see

For North America.


45pposition


Though it will be close, it is NOT a very big comet. Plus, being a PERIODIC that goes around the Sun once every 5.25 years, and has been doing so for a long time, it has expended some/much of its frozen ices that vaporize to create the tail. So it will NOT be putting on a dazzling show. If anything it will JUST (and I mean JUST) be naked eye visible. Best to try and see it with a telescope or a pair of binoculars.


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by Anura Guruge

Comet, 45P, Will Make 17th Closest (Known) Earth-Comet Encounter On February 11, 2017.

by Anura Guruge


Click to ENLARGE.

comets


Nothing to get too excited about. For a start, this same comet, 45P (where the ‘P’ indicates that it is ‘periodic’), flew by, even closer in 2011.

7.72 million mile separation is pretty respectable — 32x GREATER than the distance to the Moon.

So, don’t panic. Plus, it is quite a small comet, maybe a MILE across, max.

You may hear in the media that this the 8th closest approach by a comet. That is 8th closest as of 1950s when we really got good at measuring these distances — and you have to ALWAYS add, ‘KNOWN’.

This comet, 45P, even at this distance is unlikely to be naked eye visible!

So think of all the comet flybys our ancestors would have been oblivious to.

Also remember we are talking comets. Asteroids routinely whiz by much closer — as say did 2000EM26 in February 2014, with just 2.1 million mile separation.


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by Anura Guruge

Earth At Its Closest to Sun For ALL Of 2017 — Evening Of Wednesday, January 4.

by Anura Guruge


Click to ENLARGE.

perihelion


This happens, like clockwork, each and every year.

It has to do with the Earth’s orbit, around the Sun, being an ellipse (as is nearly all orbital paths in the Solar System). With any and all elliptical orbits you always have a closest and furthest point from the object being orbited. These are known (by the Latin) Perihelion & Aphelion.

Earth’s Perihelion with the Sun occurs in January. The Aphelion in July. In each case it is about 2 weeks after the last Solstice. This is how things are right now. Kind of a coincidence.

But it means that the Southern Hemisphere ALWAYS gets a bit closer to the Sun than the Northern. In other words, when the Northern Hemisphere is tilted towards the Sun, the Earth is at its furthest. C’est la vie.

Anywho. In 2017, Perihelion was on January 4th.


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by Anura Guruge

Moon, Mars, Venus & Saturn Over New Hampshire On Saturday & Sunday, November 5 & 6, 2016.

by Anura Guruge


nov5conjunction

Click to ENLARGE. Base map from: neave.com/planetarium/


Around 6:20 pm, should be best. Venus and Saturn will drop below New Hampshire tree line by 7:40.

Pluto is too small/dim to see naked eye!


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by Anura Guruge