A Darker View

Venus and Mars

The Moon, Venus and Jupiter — A morning conjunction of the three brightest objects in the night sky, the Moon, Venus and Jupiter on the morning of July 15, 2012, the Pleiades star cluster can be seen at the top

Over the coming weeks Venus and Mars will dance in the sunset. Close approach will occur on February 2nd, with the pair about 5° apart. They will remain in close proximity in the sky for much of February, finally disappearing into the glare of sunset around the end of the month.

On the evening of the 31st, a pretty crescent Moon will join this dance in the sunset, forming a triangle about 5° across. A 16% illuminated crescent moon with make a lovely trio with the bright planets.

Distanced from Reality

On Monday I tuned back into the TMT contested case hearing, it is a soap opera that has become rather addictive over the last few months. I will often keep the video feed up in the corner of my monitor, attempting to pick up the more interesting bits through the day.

Mr. Lee claims to be a papakilohoku, a star priest, I tuned into his testimony with some interest. As an amateur astronomer who has spent countless nights under the stars observing with hand made telescopes, or simply my unaided eyes, I am very familiar with the sky. I hoped he would relate some interesting Hawaiian sky lore while on the stand, a new legend or two. What I heard instead was a mangled version of astronomy that would embarrass any ancient Polynesian navigator.

Mr. Michael Lee was offered as a witness by Harry Fergerstrom, one of the more extreme participants in the ongoing contested case hearing. It is no surprise that this witness would espouse some of the more interesting claims made against the TMT project. I expected some wild claims, I was surprised at just how wild.

Continue reading “Distanced from Reality”

A Little Icy…

Icy — Freezing fog and 90mph winds combine to create ice sculpture on Mauna Kea

Snow — A touch of snow and ice atop Mauna Kea this morning

Ice — Freezing fog and 90mph winds combine to create ice sculpture on Mauna Kea

Ice on the Mast — Ice on the Keck weather mast

Icy Weather — The meteorological instruments atop the Keck weather mast covered with thick ice.

Summit Ice — A heavy coat of ice covers everything at the summit of Mauna Kea

MastCam Ice — Hanging ice blocks the view of MastCam after a severe winter storm on January 4th, 2015

Iced — The emergency evacuation vehicle covered with ice

A snow covered summit road — Getting to the summit over a snow and ice covered road in heavy fog

Keck 2 Ice — A ladder platform of the Keck 2 dome with a heavy coating of ice

A Blade of Ice — The effects of freezing fog on the summit of Mauna Kea

Heavy Ice — Ice on the Keck 2 dome ladders after the New Year’s storm of 2015

Park Away From Dome — An ice covered sign warning drivers to park away from the telescope dome

Keck Under Ice — Keck Observatory covered in heavy ice

From the Archive – San Xavier del Bac

Another set of images from the slide archive as the digitization project continues.

This time we visit the old Spanish mission of San Xavier del Bac south of Tucson seen here during a visit in 1996.

I visited the mission several times over the years, it can be very photogenic. A little patience will allow the photographer to catch the beams of sunlight from the upper story windows illuminating some of the saints and other icons found in this richly decorated church.

The photos are obviously from scanned slides. In the original frames the film grain is readily obvious, I use a little luminance noise reduction in processing to remove some of that. The super color saturation was not added in digital processing, it is very much part of the original slide.

Icon — Religious icon in the sun at mission San Xavier del Bac

Rattlesnake Door Handle — A forged rattlesnake door handle at mission San Xavier del Bac

Facade — Detail of the facade at mission San Xavier del Bac

ʻOhiʻa

A Little Snow…

IRTF Snow 3Mar2015 — Snow falling around the IRTF telescope on the afternoon of March 3, 2015

A Bit of Snow — The twin domes of Keck after a bit of snow on the summit of Mauna Kea

Fresh snowfall blankets the summit of Mauna Kea

Snowy SMA — The SMA antennas in snow and fog

Icy Sunrise — The Sun rising over an icy snowfield along the summit road of Mauna Kea

Light Snow — A light snowfall atop the summit of Mauna Kea

Shoveling Snow — George and Nick realizing how much snow must be moved

A Summit Road — Six inches of snow on the road as we approach the summit of Mauna Kea

Fresh Snow — Fresh snow atop Mauna Kea, the first good storm of 2013

Arrival — We arrive to eight inches of snow at the telescopes

Abandoning the Summit — Abandoning the summit as weather conditions deteriorate and the snow begins to fall

SMA On Ice — The SMA (Smithsonian Submillimeter Array) under a heavy coating of ice and snow with Haleakalā in the background

Snowy Keck 1 — Keck 1 looms in the fog and snow

A Little More Snow — April storm brought enough snow to cover the slopes of Mauna Kea

Snow Day — Looking across at the Keck 1 dome from the top of Keck 2 with Mauna Loa in the background

Snowplow — An MKSS snowplow clears the road atop Mauna Kea

Snowy Arrival at the Summit — The crew arriving to a summit to find several inches of fresh snow

Fesh snowfall from the top of the Keck 2 dome

Nearly There — Keck 2 appears out of the fog and snow as we are nearly there

Snowy Summits — A fresh snowfall blankets the summit of Mauna Kea and Mauna Loa

GenPIC, A Microcontroller Utility PCB

Over the years I have hand wired so many microcontroller PCB’s. Along with my own projects for myself there are more than a dozen of my little microcontroller devices at work about the observatory. The OSIRIS IR calibration source, the Keck 2 dome inclinometers, a precipitation sensor interface, the Keck 1 AO electronic vault temperature sensors, the weather mast fan and shelter controller, the list goes on. Anyplace a bit of electronic intelligence is needed for the task.

Of course the challenge is that each of these controllers has been hand wired and built for a specific task. This takes a few hours of running little wires on a perfboard. And while I enjoy such wiring, it does make the task take notably longer.

While a couple of my microcontroller designs have been laid out on proper circuit cards, like the SciMeasure camera exposure controllers, I have never laid out a general purpose microcontroller PCB. This is not for lack of thinking about it, so many times I have considered this could be so much easier if I could only invest a little time in a layout.

Continue reading “GenPIC, A Microcontroller Utility PCB”

Mercury at Maximum Elongation

Today Mercury will be at maximum western elongation, as high in the morning sky as it will appear for this current apparition. After today the planet will slide back into the dawn, passing through superior conjunction on March 6th to reappear in the evening around the end of March.

Mercury Transit 9May2016 — Mercury transiting the Sun on May 9, 2016. Celestron C8 and Canon 6D at f/10.

The best evening apparition of 2017 will be in July, with a maximum elongation of over 27°. The best morning apparition will be May at over 25°, with today being nearly as good at over 24°.

There are no transits of Mercury in 2017, the next will be Nov 11, 2019.

Continue reading “Mercury at Maximum Elongation”