This morning I left the Slim Buttes and drove to Pierre to get my new truck, a 2023 Toyota Tacoma. It is a lot smaller than the Ford F-150 I had but I think I can fit all my stuff in it. I may have to downsize the load a little. I can’t say I can recommend a Ford F-150 to anyone, given all the problems I had with it. Maybe I just got a bad one. Anyway, I’m glad to be rid of it. I may stay here a few days before heading for my next destination, as of now that is unknown but likely somewhere in New Mexico.
A few days ago I was hiking in the Red Cross Spring area of the Slim Buttes. Suddenly, out of nowhere, this Long-eared Owl flew in and landed in a pine tree. The birds in the area got excited and started mobbing it, but they didn’t keep at it too long. I got some pretty good shots of this Black-capped Chickadee as it foraged for seeds on the seed heads of coneflowers. This is a Juba Skipper, quite a rare species in South Dakota, with only nine records, according to The Butterflies of South Dakota. It is also a county record for Harding County. Using my new filter, I worked on this a few nights ago. This is the Lion Nebula, in Cepheus. It is very faint and in a rich star field. Without the filter and my new software, I would not have had much of chance of getting anything useful. This is a very faint nebula. I want to add more exposure to it when I get a chance.
It is typical August, birding has slowed, butterflies are much less numerous but there are the late summer species showing up now. I’m seeing flocks of nighthawks moving through. There are two species of late summer butterflies that I’d like to find, Mead’s Wood-Nymph and Pine White. I’ve seen Mead’s Wood-Nymph once before, in the North Cave Hills. Pine Whites have never been reported from the pine forests of Harding County, but they are common in the Black Hills. I had a few nights that were good for astro.
I saw the first one yesterday and today I saw more. Western Branded Skippers are uncommon in South Dakota, and this is the first time I’ve seen them. They are nectaring on Curlycup Gumweed. I saw this Red-headed Woodpecker working on a caterpillar and got some good photos. I do not know what the caterpillar is. A few days ago, I opened up the back topper door and there was a bat sitting on the tailgate of the truck. I got a few photos before it woke up and flew off. Apparently, it had crawled into the gap between the door and tailgate and went to sleep for the day. This is a Little Brown Bat. NGC 6820 is a small reflection nebula near an open star cluster known as NGC 6823.The reflection nebula and cluster within a faint emission nebula called Sh2-86. The whole area is often referred to as NGC 6820. It is about 6000 light years away, in the constellation Vulpecula. Ghosts of Cassiopeia. About 600 light-years distant, the dust clouds are slowly disappearing under the influence of energetic radiation from hot, luminous star Gamma Cassiopeiae. Gamma Cassiopeiae is an eruptive variable star, whose apparent magnitude changes irregularly from 1.6 at its brightest to 3.0 at its dimmest. Gamma Cassiopeiae is physically located only 3 to 4 light-years from the nebulae. Gamma Cassiopeiae is also known as Navi. Navi (Ivan spelled backwards, Ivan was astronaut Gus Grissom’s middle name), is a seldom-used nickname for the star Gamma Cassiopeiae. Grissom used this name on his Apollo 1 mission planning star charts as a joke, and the succeeding Apollo astronauts kept using the name as a memorial after his death when the command module interior caught fire and burned on January 27, 1967.
I’m back at the Slim Buttes. I’ve had a couple of nights with good conditions for astrophotography. It was very enjoyable being out under the dark skies with no light pollution whatsoever and no moon. I selected a target that I’ve been wanting to do for a long time, the Tulip Nebula in Cygnus. This is a summer target. Nights are short in summer, and clouds are common, so it is hard to get some of these summer targets. I have acquired some new software, StarXterminator and NoiseXterminator. With these I can remove the stars for processing and later add them back in. In a star rich field like this, the stars tend to overwhelm everything else. By processing them separately, I can get much better results. Noise reduction really helps a lot too.
Sh2-101, the Tulip Nebula, so called because it resembles a tulip when photographed with long exposures. It was catalogued by astronomer Stewart Sharpless in his 1959 catalog of nebulae. About 70 light years across and 6000 light years away, the Tulip Nebula is nearly surrounded by glowing clouds of ionized hydrogen gas. I only got about 3 hours of exposure so far, I’d like to get a lot more.
I’m back in Pierre for a few days. It is hot. Finally, a cooling trend is arriving tomorrow. I’ve been out looking for shorebirds at a wetland northeast of Pierre. Shorebird migration is in full swing and there are lots of birds to see. I was excited to see a Black-necked Stilt. The wetland is in Hughes County and that was a new county bird for me. My Hughes County life list is now at 317.
Black-necked Stilt at Baumgartner Slough, Hughes County, SD. It was a long way out so the photo isn’t very good. There are lots of Black Terns feeding on aquatic insects. I kept trying to get a good shot of this activity and finally I got this juvenile. A young American Avocet. Here’s an adult. Another Black Tern, this one is an adult. The day before I left the Slim Buttes, I found this juvenile Racer on the road. It let me get very close. Also at the Slim Buttes, I found two Eastern Tiger Swallowtails at Red Cross Spring. These represent a new county record. This is a good example of why a photo is needed of both the upper and underside of the wing. The Eastern Tiger Swallowtail is easily confused with the Two-tailed Swallowtail and the Canadian Tiger Swallowtail. The marginal band of the forewing is broken up into spots if an Eastern Tiger Swallowtail, the other two species have a continuous band of yellow.
