Postcard from Hawaii – Waimea Rainbow

This morning I was one of six cars traveling in a group towards Waimea. Then the rainbow appeared, nothing odd about that, rainbows are common here. This rainbow was a little more intense than usual, worth a second look. I slowed to allow the jeep in front of me to pull over, no surprise… An obvious tourist in a rental car and a pretty rainbow, he was going to pull over.

As we proceeded toward town the rainbow just got brighter. The next car pulled over, this time a local in an older vehicle. Then the next car, and the next, there is plenty of room to park along the Mamalahoa Highway south of Waimea.

I was now one of two vehicles from the original six… Why not?

I pull over to take photos of the rainbow.

Rainbows are not just common in Waimea, they are nearly an everyday occurrence. With the trade-winds blowing you can see a rainbow every morning and evening near the Waimea airport. Moonbows are also common in the blowing mist conditions that are prevalent here. It takes a truly spectacular rainbow to draw much comment.

A rainbow that has five out of six cars pull over?

Waimea Rainbow
An intense rainbow outside Waimea with a faint double.

Nordic Quest 2013

Sorting through thousands of photos, dozens of video clips, and assembling time-lapse from yet more thousands of frames, all to create a mere five minutes of video. It is quite the chore, but also a lot of fun. In a way I relive the voyage, each photo a cue to recall all of the little experiences that make a great trip.

Having another couple photographers along provided a great source of material, it is not all of my photos. Randy and Nancy sent me some of their best, which have been woven in to create a better video. We got lucky on the weather, while it was cloudy and rainy for much of the time, we had a glorious day for visiting the ice at the top of Glacier Bay. We were lucky with wildlife as well… Orca, grizzly, humpback whales bubble netting, mountain goats, eagles, even a set of fresh wolf prints on a beach, all of the big game.

It was fun…

Nordic Quest 2013 from Andrew Cooper on Vimeo.

Scarface

Not where I expected it, a tiny cavity in an otherwise sheer rock wall covered with sponge. It was red… A flash bright red in the dive light had my attention quickly. I could not see the fish well enough to ID it, red is uncommon enough that I set up and fired anyway, just taking a photo was hard enough in the surge.

Only after downloading the photo I realized it was a scarface blennie…

Scarface Blennie
Scarface blennie (Cirripectes vanderbilti), in a small crevice, depth 15ft.

Comet? Where?

There is one question we all have to ask when a beautiful comet graces the skies…

C/2007 N3 Lulin
Comet C/2007 N3 Lulin on the evening of 26 Feb 2009
Where to look?

Like any other solar system object, comets move against the sky. Even worse, when close to the Earth or Sun they can be moving so quickly against the stars that coordinates quickly become out of date. Aiming a telescope using coordinates a day old, or sometimes even only an hour old will result in a view of empty sky. A few stars perhaps, but no comet.

You need a table of coordinated calculated for regular time intervals, an ephemeris. Alternately you need a set of coordinates calculated for the exact time you will be looking.

Continue reading “Comet? Where?”

Saturn at Superior Conjunction

Today at 01:29HST Saturn will pass through superior conjunction with the Sun. The planet will reappear in the dawn sky later in the month.

On the 23rd and 24th Saturn will be quite near the brightening comet C/2012 S1 ISON and the planet Mercury, creating an odd planet and comet conjunction. The trio will have about 5° separation. Even more odd, the comet 2p/Enke will be inside the triangle formed by the trio, probably at 7th magnitude.

Seeing Venus in the Daytime

It is possible to see planets in the daytime. Both Jupiter and Venus are bright enough to see fairly easily in full daylight if conditions are right. You need to know where and how to look, but once glimpsed they are fairly easily seen. It is the knowing how that makes it possible. Try these simple hints…

  • Try when the planets are far from the glare of the Sun, in the first hours after dawn or last hours of the day are best.
  • Clean air is necessary. If the air is hazy, dusty or smoggy it will hide the planets from view, particularly when near the Sun. There will just be too much solar glare to pick out the planet. For the same reason try when the planet is high in the sky and you are looking through much less air.
  • The human eye will relax and defocus if there is nothing to focus on. This happens when looking at a plain expanse of blue sky. You could be looking right at the planet and not see it. A few puffy clouds around, or better yet, the Moon, will give the eye something to focus on, allowing the planet to be easily seen.
  • Put the Sun out of sight to reduce glare. Simply position yourself in the shadow of a tree or building to get a better view.
  • Pick a day when the Moon is near the object you are looking for, it will provide a simple signpost to the correct location.

It is this last hint that can be particularly useful today. Venus is about 8° degrees south of the Moon today. It helps that Venus is near maximum elongation, as far as it will get from the Sun for this evening apparition. If you can find the Moon high in the midday sky check just below it for Venus. The planet will be about a sixteen lunar diameters away from the Moon, seen as a bright star-like object.

Have a try.

Teardrop

The little teardrop butterfly was playing peek-a-boo with me. It would peek out, the strobe would fire, it would dart back into the coral. Repeat cycle…

This little fish had good reason to be shy, it is a favorite of the aquarium collectors.

Teardrop Butterflyfish
Teardrop butterflyfish (Chaetodon unimaculatus) peeks out from under cover