Thursday, March 26, 2009

25 March 2009

Observing LocationUnion Square Park, New York, NY
Lat.: 40° 44′ 9.54″
Long.: 73° 59′ 26.48″
Union Square Park is a surprisingly good place to observe. There is a fair amount of sky visible but that will decrease when the trees leaf out. I saw the head stars of Orion but not the Sword and detected the Pleiades.
Observational Period1950-2015 EDT
Atmospheric Conditions
Cloud CoverScattered Clouds
Temperature44° F
WindCalm
HumidityModerate
Barometric Pressure30.26" Hg
Steady
Feels LikeCool

The clouds have been building and dissipating this evening. When I first went out I could see stripes of gray but it was mostly clear.

TransparencyGood
Seeing 
InstrumentsNaked-eye - Charlie
Observing PartyCharlie Ridgway

TargetIridium 33 Debris Visible Pass
Constellation
CategorySatellite
Time
yyyymmdd.hhmm
20090325.2007 EDT
CommentsSpaceweather has had pictures of the largest piece of Iridium 33 flaring as it tumbles across the sky. The orbital elements of the piece have been determined and visible pass predictions are being posted in the Spaceweather satellite tracking tool. Unfortunately they only tell you where it breaks the horizon and how high it will bet but not shat direction it is moving in. I looked but had a high horizon so had to scan a lot of sky to try and find it at culmination and missed it. I don’t know how much steady light I am looking for and how much flare to expect.

Rises2007 EDTAz.SSW
Culminates2012 EDTAlt.52°
Mag.2.6

STS-119 undocked form the ISS this evening. There is a dual ISS/STS-119 visible pass tonight with close separation but it is short and disappears below my local horizon. There are a couple of passes tomorrow, one of which will be longer and higher but with less separation, but it is supposed to rain tomorrow.