Cap'n Bob & the Damsel

Astronomy

Adios AR 2192 (For Now)

AR 2192

I went out to the courtyard to photograph the last image of the great sunspot of 2014, AR 2192 before it rotates out of Earth view. According to the article below, there is a possibility of the spot to return to the Earth-facing side of the solar disk in a couple of weeks. Click on the image to enlarge.

From SpaceWeather.com:

SUPER-SUNSPOT PREPARES TO DEPART: The biggest sunspot in nearly 25 years is about to leave the solar disk.

. . .

As AR2192 approaches the sun’s horizon, it is no longer facing Earth. However, the odds of an Earth-directed radiation storm are higher than ever. The reason is, the western limb of the sun is well-connected to Earth. Solar magnetic fields springing out of that region spiral back to our planet. If a sunspot passing through the area explodes, those spiralling magnetic fields can funnel energetic particles in our direction.

In only a few days, the behemoth sunspot will begin a 2-week transit of the far side of the sun, carried around by the sun’s 27-day rotation. However, that doesn’t mean we’ve seen the last of this magnificent active region. Big sunspots typically persist for two or three solar rotations before they decay. After it leaves, AR2192 will return in November.

28 Oct 2014 by Astronomy Photography Science

Partial Solar Eclipse

Partial Eclipse Panel

Damsel and I watched periodically as the new moon partially obscured the sun today. The eclipse stats for Phoenix (according to NASA) are as follows (Times MST):

  • Eclipse begins: 14:21
  • Maximum eclipse: 15:38
  • Eclipse ends: 16:45
  • Sun altitude: 24°
  • Sun azimuth: 236°
  • Magnitude: 0.449
  • Obscuration: 0.331

The three-image panel above shows the lunar disc (left to right) just appearing, near maximum obscuration and just disappearing. I used the same setup today as I did for the 2012 annular eclipse and transit of Venus. Click on the image to enlarge.

The terms “magnitude” and “obscuration” above (I infer) refer to the percentage of penetration of the lunar shadow across the solar disc and the percentage of of the total solar area blocked by the moon. Those numbers (more or less) can be seen in the middle image above near max eclipse. I assume that the azimuth and altitude (elevation above horizon) are for maximum eclipse time.

We were blessed with beautiful, clear skies during the event and enjoyed yet another one of God’s wonders from our desert home. We’re still planning to be in a position to see the August, 2017 total solar eclipse event.

23 Oct 2014 by Astronomy Photography

Now THAT’s a Sunspot!

Sunspot 2192

We are going to have a partial solar eclipse tomorrow afternoon. I went out this morning to take some practice shots of the sun and it just so happens that major sunspot AR 2192 is transiting the nearside of the solar disc. There are several other smaller sunspots visible. Click on the image to enlarge.

As for the eclipse, there are some details about it on NASA.

And more about this giant sunspot at SpaceWeather.com:

Earth-effects could increase in the days ahead. AR2192 has an unstable ‘beta-gamma-delta’ magnetic field that harbors energy for powerful explosions, and the active region is turning toward Earth. NOAA forecasters estimate at 65% chance of M-class flares and a 20% chance of X-flares during the next 24 hours.

Watch for some of our eclipse photos here after the event.

UPDATE: Sunspot 2192 has moved to the right and is in a position almost directly facing the Earth. Click here to view photo taken 23 Oct 14.

22 Oct 2014 by Astronomy Photography Science

Ninth Blogiversary on Autumnal Equinox 2014

Equinox 2014

It seems like it has been longer, but today, which coincides with the Autumnal Equinox, is the ninth anniversary of the CB&D blog. Since we had our own internet service provider and domain/website, we skipped the Blogger/Blogspot routine and went for a self-hosted weblog using a somewhat inferior publishing platform, the name of which I forget, and upgraded to WordPress® shortly afterwards. Some of the very early posts were lost in the process of upgrading, but the ones we managed to recover are still in the database on the ISP’s server. This post marks the 6326th blog entry into the WordPress database. That is a lot of hot air!

To us, the weblog has been a way to archive our activities and to log events as they take place. Sort of like an on-line diary, if you will. Every once in a while, I will dig back into the archives to try and locate something we knew happened in the past and usually can find what I’m seeking with the platform’s built-in search engine.

We may not post as often as we did in the past (life has its complications), nor do we post as politically as in the past, but we plan to continue using the weblog as a journal of events, a repository for a few of the Damsel’s photos and whatever whim suits us. We’re independent of social media (Bookface, Twatter, etc.), so there won’t be any repression of our thoughts unless the First Amendment is repealed – which this administration is rapidly seeking to do.

We should be here for a while . . .

22 Sep 2014 by Astronomy Blogosphere

Supermoon

Super Moon

Last night, we had the first of three so-called supermoons this summer. It is the phenomenon where the moon appears to subtend a larger angle in the sky due to it’s close proximity to the Earth. We’re due to have another, even larger supermoon on August 10th.

From Wikipedia

A supermoon is the coincidence of a full moon or a new moon with the closest approach the Moon makes to the Earth on its elliptical orbit, resulting in the largest apparent size of the lunar disk as seen from Earth. The technical name is the perigee-syzygy of the Earth-Moon-Sun system. The term “supermoon” is not astronomical, but originated in modern astrology. The association of the Moon with both oceanic and crustal tides has led to claims that the supermoon phenomenon may be associated with increased risk of events such as earthquakes and volcanic eruptions, but the evidence of such a link is widely held to be unconvincing.

The most recent occurrence was on July 12, 2014. The next and closest supermoon of 2014 will be on August 10.

The opposite phenomenon, an apogee-syzygy, has been called a micromoon, though this term is not as widespread as supermoon.

Although the reference to supermoons causing earthquakes is “held to be unconvincing,” I still remember the 1971 Sylmar quake which occurred the morning after a supermoon. I remain completely unconvinced that anything other than terrestrial tectonic plate movement had anything to do with that event.

13 Jul 2014 by Astronomy Environment

First Day of Summer

Solstice

Today is the first day of summer. The above is a screenshot captured from the Archaeoastronomy website where the eight significant stations of the Earth’s orbit are depicted: solstices, equinoxes and cross-quarters.

Now, it is time to brace yourselves for the inundation of the greenbats cries about global warming, regardless of summer being quite a natural phenomenon. It’s all about their political agenda, not about the weather.

From Joe Bastardi via The Patriot Post:

I have stopped trying to argue with someone who refuses to look at anything but that which supports his own position. It’s pointless. So in an effort to end a debate quickly, I now politely ask individuals to explain how CO2, given how small it is relative to all around it, actually changes the entire system. That usually stops it with most of the crowd. Like many things I see with new age forecasters today, they will jump on one weather factor and not understand its behavior is because of everything around it.

The second thing I do is put the ball in their court. This requires knowing what went on historically with weather/climate. So I ask what the perfect number is for CO2 in the atmosphere. An example: Dr. Bill McKibben – one of the people I am frequently amazed with because his comments indicate he either does not know and understand what the weather has done before, or does and refuses to let that get in the way – runs a group called 350.org. He and his team want CO2 at 350 ppm (parts per million). So let’s just go to 350 ppm and see what it was like.

First, here is CO2 on the “correct” scale, which is the percentage of the atmosphere. This is not what you commonly see, which is the amount of CO2 in parts per million, where CO2 is grossly over-represented. The scale should be from one to a million, not a tiny fraction of a million.

[more]

21 Jun 2014 by Astronomy Environment Global Warming Greenbats

ISS HD Earth Viewing Experiment

Southeast Asia

This is an interesting thing to watch live streaming from the International Space Station. It is a high definition view of the Earth below taken from one of four HD cameras aboard the ISS. I screen captured the image above of somewhere over Southeast Asia as the ISS sailed off to the south pacific. Read the entire description of the experiment at APOD.

This is a good site to find out the current location of the ISS. Click on the image to enlarge.

UPDATE: I watched the streaming video as the ISS approached the terminator and was surprised to see the full moon rising in the distance.

Full Moon Rising

UPDATE II: This is looking back at the setting moon at about 1815UTC 5/16/2014 as the ISS passed into western Canada.

Moonset

Click on the images to enlarge.

14 May 2014 by Aerospace Astronomy Rocket Science

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