Jupiter at Opposition

Jupiter will pass through opposition at 09:49HST today.

Jove
Jupiter and the moons Europa, Ganymede and Callisto (left-right)
Jupiter orbits the Sun once every 11.86 years. As the giant planet continues on its way the Earth swings around much faster on our inside track. As a result we lap Jupiter once every 399 days, passing between the planet and the Sun. During opposition Jupiter will rise at sunset, transit at midnight, and set at dawn. This makes the planet available for observation for the entire night.

Look for a bright object rising in the eastern sky after sunset. It is difficult to mistake for anything else, shining at it’s brightest during opposition, a brilliant -2.7 magnitude. For the remainder of the winter and much of the spring, the planet will be quite prominent in the evening sky.

Juvenile Bigeye Emporer

Sometimes you see a fish that is not familiar, asking yourself “What is that?” After so many dives I probably have seen one before, but have not paid any attention to that particular fish in the swirl of color and fish on the reef.

Then comes the challenge of identifying the photo. A first run through the book provided no answers. A second run, checking any families with similar body plans… Nothing. Great, it is probably juvenile that looks nothing like the adult… The adult photo is in the book. More browsing, this time on the Stender’s website. The website often has multiple photos of the same species, including the color variations that come with differing sex and age.

Yup, a juvenile bigeye emperor, it looks absolutely nothing like the adult

Juvenile Bigeye Emperor
A juvenile bigeye emperor (Monotaxis grandoculis) at 30ft depth, Hoover’s Tower

Rainbow Wheel

As I have mentioned previously, Waimea has rainbows.  Not just a few rainbows either, but multiple rainbows through the day.  Add a few cloud bows, and moon-bows into the schedule and you get the idea of how common rainbows are in this town.  The last couple weeks have been above average, with rainbows even us jaded rainbow viewers have stopped and taken notice of.

I stopped for this rainbow as is looked like a good photo op,  I was just on my way home from work and had plenty of time to play with a camera.  To my surprise I noted that some cloud shadows were cutting the south end of the bow, creating a wheel, something I had never seen before.

Rainbow Wheel
A rainbow and cloud shadows produce a rainbow wheel

Perihelion

Today the Earth is closest to the Sun, a point called perihelion. We will be about 147,099,000km (91,403,000miles) from the Sun. Compare this to the 152,096,000km (94,508,000miles) we will be at aphelion on July 3rd, a difference of about 4,996,000km (3,104,000miles) occurs throughout one orbit.

It may seem odd that we are actually at the closest for the middle of northern winter, you just have to remember that proximity to the Sun is not the cause of the seasons. The seasons are caused by the axial tilt of the Earth, creating short and long days throughout the year, with a resulting change in the angle and intensity of the sunlight.

2014 Solstices and Equinoxes
  UT HST
Perihelion Jan 4 05:59UT Jan 3 19:59HST
Vernal Equinox Mar 20 16:57UT Mar 20 06:57HST
Summer Solstice Jun 21 10:52UT Jun 21 00:52HST
Apehelion Jul 3 22:59UT Jul 3 12:59HST
Autumnal Equinox Sep 23 02:30UT Sep 22 16:30HST
Winter Solstice Dec 21 23:03UT Dec 21 13:03HST
 
Source: NASA Sky Calendar

 

The Sky for 2014

What is happening in the sky this year?

There are no exceptional sky events expected in 2014. A pair of good lunar eclipses, a decent Mars opposition, the usual meteor showers, and no bright comets predicted. There is one odd meteor shower that might provide some fireworks in May mentioned below. Otherwise there is always the possibility of a new discovery, a nova or supernova, or a new comet. For now this looks to be a routine year for sky watchers.

Mars during the 2005 opposition
Mars during the 2005 opposition

Planets

Venus is as always a fun planet to follow through the year. The brilliant morning or evening star is always notable when it passes other bright objects such as the Moon or Jupiter. In April and May Venus will pass both ice giants, Uranus and Neptune with under a degree of separation. In August it will be Jupiter, passing about 35′ away on August 14th. The approach will be even closer if you are able to observe the pair during daylight hours, closing to 12′ at 08:06HST on the 14th.

Mars will pass through opposition on April 8th this year. This is a relatively good viewing opportunity with the red planet appearing just over 15″ in size. Close approach will be a week later, on April 14th. On September 27th Mars will pass about 3° from Antares.

Jupiter and Saturn continue to be well separated in the sky. This results in one or the other being available for observation much of the year. We start with Jupiter in the evening sky until early July. Saturn is currently in the early morning sky, passing through opposition May 10th and available for observation in the evening sky for the latter half of the year.

Minor Planets

The minor planets Ceres and Vesta are quite close all year. So close they will experience opposition in the same week. The dance will take place with the constellation Virgo as the backdrop. 4 Vesta will pass through opposition on April 13th, only two days later 1 Ceres will do the same on the 15th. At the same time the planet Mars will be just a few degrees south of the pair, going through opposition on April 8th. I wonder if the astrologers have noticed this? If so I am sure they will attach some ridiculous speculations to the event. They do not usually pay attention to the minor planets.

Lunar Eclipse 28Aug2007
Total lunar eclipse, photo is a 8sec exposure with a Canon 20Da on a 90mm f/12 APO

Eclipses

There are two solar eclipses and two lunar eclipses for 2014. An odd annular solar eclipse will be visible from Antarctica and Australia on April 29th. A deep partial solar eclipse will be visible across much of western North America on October 23rd. Neither will be visible from the islands.

The two lunar eclipses are more interesting. Both total eclipses will feature good magnitudes and the eclipses will both be visible in their entirety from Hawai’i. Better yet, the first eclipse will begin soon after sunset, providing an excellent viewing opportunity for outreach. Occurring on April 14th and October 7th, these will be the highlight of the year for eclipse aficionados.

Meteor Showers

2014 offers an interesting year for meteor watchers. Of the three most reliable showers it is the Quadrantids that will be seen to best effect in 2014, untroubled by moonlight. The Geminids will be partly obscured, while the Perseids will peak quite close to full Moon.

In addition to the traditional showers there are predictions for a new shower associated with Comet 209P LINEAR. In late May this debris stream may produce a strong, or even storm level meteor shower. Watch here for more information on this possible event.

Comets

While no spectacular comets are predicted for 2014 there are several decent comets available for telescopic observing or photography. Late summer and into early autumn look for comet C/2012 K1 PanSTARRS to peak around magnitude 6.

As usual you should keep tuned to Darker View for timely reminders of upcoming celestial events. Over a hundred posts are already entered and waiting for the appropriate date to pop up here, reminding you and I to keep looking up.

The Moon and Venus

A very thin crescent Moon will appear below Venus in the sunset this evening. Look for a 1% illuminated crescent quite low, only about 10° elevation at sunset. Venus will be a bit higher, about 14° above the setting Sun.

Crescent Venus
Venus approaching inferior conjunction, 24Dec2013
Tomorrow evening will see the Moon much higher than Venus, reaching an altitude of 22° and waxing to 5% illumination.

A telescope will reveal that Venus also shows a thin crescent phase, only 3% illuminated as it approaches inferior conjunction, passing between the Earth and the Sun.

2013 In Review

A year in review article? Really? Yeah, everyone does it, and you get tired of them. I am going to do it anyway… It is a nice excuse to look back over the previous year and see what I spent the last 365 days of my life doing.

As Darker View is intended to be a web diary, in the original sense of the term blog, I can look back through a year of postings to do this. I have to admit a few surprises were to be had, things I had forgotten about!

Pāhoehoe
An active pāhoehoe breakout at Kupapaʻu

Looking back I have to admit it was not a bad year.

Andrew and the Galaxy
Taking astrophotos under the Milky Way Galaxy

Welcome to 2014!

Welcome to 2014!

We may be among the last to join in the new year, Hawai’i is always a bit behind, but we do it in style. I have noted that the amount of fireworks going off in the neighborhood is a good economic indicator. The size of some of the local arsenals is fairly impressive this year, in notable contrast to some previous years, there is a lot of crackle, whistle and bang this year.

Fireworks over Palm Trees
A fireworks display over the coconut palms of the Fairmont Orchid resort