Postcard from the Summit – First Target of the Night
Postcard from the Reef – Rosy Phyllidia
A nice day for a dive, and a new species of nudibrach for me. At first I thought it might simply be a juvenile P. varicosa, but there were no yellow pertuberances. Getting back I hit the books, no doubt, P. rosans. New species! This fellow was in a cave at Puako I have entered a dozen times. Even in a place I have often explored I can find something new…
The Moon and Saturn
Saturn, the Moon and Spica will form a trio high in the sky at sunset tonight. The three will be within 7° of each other. The gibbous Moon will be 62% illuminated. Saturn will be shining at 0.4 magnitude while Spica is very close to 1.0 magnitude. Look for the planet Mars 25° west of Saturn at about the same brightness.
Return to the Light
Postcard from the Universe – M46
Postcard from the Reef – Spanish Dancer
What is that? That is too big to be a nudibranch, but that is what it looked like. I could only see part of the beast looking into the cave crevice. Fortunately it turned out to be somewhat photophobic, the bright light flushed it out of the crevice into the cave…
I make a point to look for nudibranchs, pretty critters that are wonderfully photogenic. Looking into the nooks and crannies of the reef for nudibranchs also tends to turn up other tiny surprises.
This was not small!
While the typical nudibranch is one or two inches long, this fellow was the size of a dinnerplate! Adding to the wonder was the dance. As soon as the animal left the crevice it swam across the cave. I flashed Mark to get his attention, he was ready to leave the cave. I suspect he is glad he came back. Deb also wondered what we were still doing in the cave and came in to check on us. Thus we all got a good look at the dance.
After a few photos… OK, a lot of photos, I shepherded the fellow back into his crevice. Once I withdrew the light he settled down to stay in the darkness.
Diving Puakō
Another weekend, another dive. This time at one of our favorite dive spots, Puakō End-of-Road. It was just Deb and I this time. The usual crew was out this weekend as well, but we had other goals in mind for the dive and choose to go to a closer site.
The other pleasant surprise was finding two new species of nudibranch. As Deb and I were diving without the rest of the crew, I was particularly slow. As usual poking my head into every nook and cranny. The result was finding examples of Phyllidiella rosans and Phyllidiopsis sphingis.
Going slow and shallow had another effect, almost 80 minutes underwater. Not a record for us, but high on the list of our longer dives. Not bad for a single aluminum 80 cylinder.
A nice Saturday dive, another hour spent underwater, and some new stuff found. A good day.
Postcard from the Universe – Butterfly Cluster
Known as M6, NGC6405, or The Butterfly Cluster, this pretty open cluster lies just above the tail of Scorpius. Visible to the unaided eye under a dark sky, it is an easy photographic target.
I have been working on improving the color balance in my astrophotos. Color is an interesting and complex subject in photography, worse in astrophotography. I think the results are much better here that in my previous work. Hope to take a few more photos this week and will continue to experiment.
Postcard from the Reef – Lizardfish
The Moon and Mercury
A very thin Moon will rendezvous with Mercury this evening. The pair will separated by about 8° and at the same elevation, over 20° at sunset. The Moon will be a very thin crescent, only 7% illuminated. A little over 5° north of Mercury will be Pollux, with Castor a bit further north, both stars about a magnitude dimmer than the planet which is currently about zero magnitude.