From: Jim Stamm To: Crescent ReportSubject: April's New MoonNew Moon Crescent Observation Report====================================April 2007Location = Tucson, Arizona (USA) Longitude = 110.9353 W Latitude = 32.4261 N Elevation = 840 meters Time Zone = -7.0 hoursSurface conditions at time of first sighting atTucson International Airport (805 m) Temperature = 22 degrees Celcius Relative Humidity = 20 percent Atmospheric Pressure = 1015 mbTopocentric and local time values from “Accurate Times Sunset (at sea level) = 19:00 (18:51 from our vantage point) Moonset (at sea level) = 19:43 (19:38 from our vantage point) Time from new moon at 18:58 = 15 hr. 06 min. Moon lag time = 43 minutes Relative Altitude = 8.4 degrees Elongation from sun = 8.6 degrees Crescent width = 11 arcseconds Illumination = 0.57 percentCrescent first observed through 8” SC telescope Time = 18:58 Altitude = 6.7 degreesFinal observation with telescope Time = 19:38 Altitude = -1.0 degreesThis was the prettiest crescent that we’ve seen. At first only about 5 arc-degrees was visible. It looked too straight to be the crescent, but the image persisted and we finally had to accept it. After several minutes, the crescent seemed to spread out to 80 arc-degrees, instantaneously. Gradually it grew to about 90 arc-degrees, and the brighter sections became “connected.” We watched it for a total of 40 minutes, until we could see the horns speeding through the trees on the horizon, which was maybe about 6 kilometers away.Jim StammJohn Polacheck
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