04 July 2004

3 July 2004

Observing
Location
The Great Lawn (North), Central Park, New York, NY
Atmospheric
Conditions
A lot of contrails were visible tonight even in the dark skies. It was slightly cool after sunset and the air remained dry, the relative humidity must have been very low all night. Light from Times Square is bothersome when looking Manhattan south, a pillar of light up to the zenith. The moon had a ring around it when it finally got up above the trees.
InstrumentsCanon 15x50 Image Stabilized binoculars - Charlie
Fujinon 7x50 binoculars - Ben
monocular - Tom
Observing
Party
Charlie Ridgway
Ben Cacace
Ton Clabough

TargetJupiter
Time03July04; 2114 EDT
CategoryPlanets
CommentsOn the way into the park Jupiter was first sighted naked eye over the Metropolitan Museum of Art in a darkening sky. Regulus was dim to lower right, Arcturus golden and high overhead.
In the binoculars Ganymede and Callisto were out to the east, Io was fairly close and high to the west. The planet looks flattened above in my binoculars, may be an artifact of flare. There was a field star out to the east that looked like a moon but was very far away, maybe 2 degrees.

TargetDiamond of Virgo
Time3Jul04; 2130 EDT
CategoryAsterisms
CommentsIt was difficult with the glare of the park lights, but I was able to make out all the stars of the diamond (Cor Caroli in Canes Venatici, Arcturus in Scorpius, Spica in Virgo and Denebola in Leo. The most difficult was Denebola being the closest to a light.

Targetδ Bootis
Time3Jul04; 2150 EDT
CategoryDouble Stars
CommentsThis is a wide double in Bootes. I found it easily in my binoculars but it is so wide I wasn't sure I had it. It is the left point of the kite.

Targetμ 1 Scorpius
Time3Jul04; 2153 EDT
CategoryDouble Stars
CommentsThis is a close double. It was just above the tree line in the SE. Ben located it in my binoculars. It appeared to be flashing green and white in the atmosphere. Later in the evening when it had gained altitude it was very solid. Since it is in the tail of Scorpius it is an area of the sky we generally don't get to observe because of haze. This double is just visible naked eye.

TargetAlberio
Time3Jul04; 2241 EDT
CategoryDouble Stars
CommentsAlberio is a close double. The primary is gold while the secondary is green-blue. It was barely visible in Ben's binoculars due to the closeness of the stars. If I hadn't been told it was a double I probably wouldn't have noticed the secondary shining next to it.

TargetM39, NGC 7092
Time3Jul04; 2251 EDT
CategoryDeep Space Objects
CommentsAn open cluster near Deneb in Cygnus, 2 fields to 8:00 from the right wing. A dim triangle of stars. Ben found it.

TargetM7, NGC 6475 Ptolemy's Cluster
Time3Jul04; 2255 EDT
CategoryDeep Space Objects
CommentsAn open cluster in Scorpius. Brighter than M39 but low and in a bright sky so hard to see in Ben's binoculars. Very bright and large in my binoculars.

TargetM6, NGC 6405, Butterfly Cluster
Time3Jul04; 2302 EDT
CategoryDeep Space Objects
CommentsIn Scorpius near to M7. Looked like a small house laying on its side, Fairly dim. M6 and M7 are supposed to be two of the brightest open clusters visible in North America, visible with the naked eye. Together they are known in Arabic as Al-Humah Al-Akrab, the Venom of the Scorpion, because of their location just above the tail of Scorpius

TargetSagitta, The Arrow
Time3Jul04; 2310 EDT
CategoryConstellation
CommentsThe constellation filled the field of view in Ben's binoculars making it too big for mine. It was too dim for me to see naked eye.

TargetM11, NGC 6705, Wild Duck Cluster
Time3Jul04; 2326 EDT
CategoryDeep Space Objects
CommentsThis open cluster in Scutum appeared as a dim egg-shaped smudge in Ben's binoculars. One of the densest open clusters it appears more like a globular.

TargetMoon
Time4Jul04; 0000 EDT
CategoryMoon
CommentsThe moon rose just past full, 16 days 8 hours, 95% illuminated, behind the trees close to the walk so we never saw it until around midnight. The terminator was just visible on the right limb in the upper right quadrant. Aristarchus was very evident as were a number of other bright features like the rays. Plato and Grimaldi were both very dark. Central peaks were evident in Longrenus and several other craters.
By the time I arrived home at around 0200 the Moon already appeared less than full.

TargetNGC 869 & 884, The Double Cluster
Time4Jul04; 0029 EDT
CategoryDeep Space Objects
CommentsDouble cluster in Perseus. Twice the distance between the end stars of Caseopea toward Perseus. It all looked like one object to me in Ben's binoculars. They are supposed to be visible naked eye. The clusters have a lot of glow from unresolved stars at their center and are in a rich star field to begin with so that might account for my trouble differentiating them in Ben's binoculars which, to me, lack contrast. There is debate about whether these are an actual double or an optical double.

TargetCorona Australis, The Southern Crown
Time4Jul04; 0049 EDT
CategoryConstellation
CommentsIt looked like a fish hook standing on its shank just above the trees in the east. Too dim for me to see naked eye. We are usually not able too see anything in this area because of clouds.

Disclaimer
This is my personal record of my astronomical observations. It was written for my personal reference. The only reason it is in a blog is that a blog is a very convenient way to get the records formatted more or less uniformly and they will, hopefully, have greater longevity at Google where the servers are backed up than on my hard drive which never gets backed up. I occasionally include copyrighted material in my posts. I do this to make it convenient for me to access things I think I might want to refer to again. I think of this like making a photocopy of something I read that I put in a file where I can find it when I want it. As I understand copyright law, as explained in the DVD series Copyright Compliance by Chip Taylor Communications, this use is allowed under the Fair Use doctrine since I am not making any money on this blog, I don’t publicize the blog, and only occasionally post small excerpts of copyrighted works.


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