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From: Jim Stamm
To: Crescent Report
Subject: April's New Moon



New Moon Crescent Observation Report
====================================
April 2007

Location     = Tucson, Arizona (USA)
    Longitude = 110.9353 W
    Latitude  =  32.4261 N
    Elevation = 840 meters
    Time Zone = -7.0 hours

Surface conditions at time of first sighting at
Tucson International Airport (805 m)
    Temperature          =   22 degrees Celcius
    Relative Humidity    =   20 percent
    Atmospheric Pressure = 1015 mb

Topocentric 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  percent


Crescent first observed through 8” SC telescope
    Time      =   18:58
    Altitude  =   6.7 degrees

Final observation with telescope
    Time      =   19:38
    Altitude  =   -1.0 degrees

This 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 Stamm
John Polacheck



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