Wednesday, February 25, 2009

25 February 2009

The STS-119 Flight Readiness Review is to continue today. In a story published last night Spaceflight Now says that the shuttle could not fly before 12Mar09 and can't fly between 13Mar09 and 7Apr09 due to the presence of the Progress craft carrying Expedition 19. NASA has decided to swap out the Discovery Hydrogen Flow Control valves for similar valves that have less flight time and have had better results in the tests performed on them. Later today they are to announce what their plan is for getting Discovery off the ground and what it will mean for other craft in the fleet.



Observing LocationWashington Square Park, New York, NY
Observational Period1545-1600 EST
Atmospheric Conditions
Cloud CoverClear
Temperature42° F
WindCalm
HumidityLow
Barometric Pressure30.40" Hg
Steady
Feels LikeCool

It feels like an early spring day. There are still ice puddles in the streets.
There are no clouds and the sky is light blue.

TransparencyExcellent
Seeing 
InstrumentsNaked-eye - Charlie
Observing PartyCharlie Ridgway

TargetVenus
ConstellationPsc
CategoryPlanet
Time
yyyymmdd.hhmm
20090225.1545 EST
CommentsVenus was very faint and I wasn’t sure I was seeing it but it didn’t move in the sky when I moved my head. I even changed my location twice and was able to recover it each time.

Object
Class
Classical Planet
PhaseWaning Crescent
Elongation36.92° E
% Illuminated21.9%
Distance
Light Time
(from Earth)
0.3884111 AU
3m 13.84s
Distance
(from Sun)
AU
Angular Size42.94"
Magnitude-4.6
Altitude53.8765°



Observing LocationBowery @ Great Jones St, New York, NY
Observational Period1900-1915 EST
Atmospheric Conditions
Cloud CoverClear (?)
Temperature35° F
WindLight Breeze
HumidityModerate
Barometric Pressure30.41" Hg
Steady
Feels LikeCool

I can’t be sure of it but I get the impression that there may be some light cirrus clouds or at least haze up there.

TransparencyGood
Seeing 
InstrumentsNaked-eye - Charlie
Observing PartyCharlie Ridgway

TargetCapella
ConstellationAur
CategoryStar
Time
yyyymmdd.hhmm
20090225.1905 EST
CommentsCapella was at zenith and very bright.

TargetCassiopeia
ConstellationCas
CategoryConstellation
Time
yyyymmdd.hhmm
20090225.1910 EST
CommentsI could only locate the α and β stars of Cas, both Mag 2.2x.

TargetIridium 3 Flare
ConstellationCam
CategorySatellite
Time
yyyymmdd.hhmm
20090225.1910 EST
CommentsThis was the strangest Iridium flare I have ever seen. It did not appear to come from where it should have (based on my understanding of directions at this location) and didn’t really flare.

I had checked in CalSky and determined that the satellite would be moving on a S to N track and should pass through the bowl of the little dipper then flare just NE of Polaris. I observed it as it passed under Shedar and Navi in Cas appearing to come out of the WSW-W and go to the ENE-E passing above Dhube and Merak in UMa before it began to fade. Until it began to fade its brightness appeared to be constant and it was brighter than Shedar and Navi. It was more like an ISS pass than an Iridium flare.

I checked CalSky to see what other satellites would be on that track at that time of night and only came up with TRMM which went in the right direction but was farther down on the southern horizon and was fainter than Shedar and Navi.

Alt.41°
Az.14°
NNE
Mag.-1
SurfaceMMA2

TargetCastor and Pollux
ConstellationGem
CategoryConstellation
Time
yyyymmdd.hhmm
20090225.1915 EST
CommentsThe only stars I could pick out in Gemini tonight were α Gem and β Gem.

TargetOrion
ConstellationOri
CategoryConstellation
Time
yyyymmdd.hhmm
20090225.1915 EST
CommentsI saw the three bright corner stars and the belt but not the sword, shield or club.

TargetTaurus
ConstellationTau
CategoryConstellation
Time
yyyymmdd.hhmm
20090225.1915 EST
CommentsI saw Aldeberan and some twinkling where the Pliades would be but I could not make out individual stars in M45.

TargetSirius
ConstellationCMa
CategoryStar
Time
yyyymmdd.hhmm
20090225.1915 EST
CommentsSirisu is low on the horizon and often hidden by buildings. It is very bright, especially for its altitude - or lack thereof - in the sky.