1 September 2008

From the latin word septem, "seven," because this had been the seventh month of the early Roman Calendar

September, the seventh month.

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Observing Location	McGraw Ave @ White Plains Road
Observational Period	1815-2015 EDT
Atmospheric Conditions	Cloud Cover Scattered Temperature 81° F Wind Gentle Breeze Humidity Moderate Barometric Pressure 30.10" Hg Steady Feels Like Warm The sky looks clear most of the way down to the horizon. With the red filter I can see wisps of cloud moving across the lower sky. Transparency Good Seeing I
Instruments	Unless otherwise noted observations were made with the Golden Gate binocular. Golden Gate 7x35 binocular – Charlie Brunton 8x21 compact binocular w/Welco gold shade 14 welder's filter - Charlie Cokin Professional 003 red filter - Charlie
Observing Party	Charlie Ridgway

Target Sunspots Constellation Leo Category Solar Time yyyymmdd.hhmm 20080901.1815 EDT Comments Distance Light Time 1.01 AU 8m 23s Angular Size 31' 45.2" Altitude 12.8° Heliographic Latitude (B0) 7.21° Heliographic Longitude (L0) 327.02° Parallactic Angle (P) 21.37° Carrington rotation number (CR) 2074 Nothing Seen   Groups Spots R North 0 0 0 South 0 0 0 Total 0 0 0 R = (Groups * 10) + Spots)

Target Young Crescent Moon Constellation Vir Category Lunar Time yyyymmdd.hhmm 20080901.1926 EDT Comments Lunation 1060 Phase Waxing Crescent Age 2d 3h 27m Distance Light Time (from earth) 386,794 km 1.29s Elongation 26.8° 5.3% Illuminated % Morning Terminator Colongitude (λ E) 291.4° Evening Terminator Colongitude (λ W) 111° Libration in Latitude 5° 54' Libration in Longitude 4° 48' Magnitude -6.5 Angular Size 30.89' Altitude 6° 49' Virtual Moon Atlas graphic I located the Moon low on the horizon in the binoculars at 1926 EDT and naked-eye immediately after.

1929 EDT	Sunset Civil Twilight begins

Target Venus Constellation Vir Category Planet Time yyyymmdd.hhmm 20080901.1930 EDT Comments Object Class Classical Planet Phase Gibbous Elongation 23° % Illuminated 91.9% Distance Light Time (from Earth) 1.53 AU 12m 46s Distance (from Sun) 0.723 AU Angular Size 11" Magnitude -3.9 Altitude 10.6° Meridian graphic Venus was to the upper right of the Moon. They both fit in the Golden Gate FoV.

Target Mars Constellation Vir Category Planet Time yyyymmdd.hhmm 20080901.1930 EDT Comments Object Class Classical Planet Elongation 28.8° Distance Light Time (from Earth) 2.42 AU 20m 5s Distance (from Sun) 1.61 AU Angular Size 3.87" Magnitude 1.7 Central Meridian 335° Altitude 12.6° Starry Night Starter graphic Not Seen

Target Jupiter Constellation Sgr Category Planet Time yyyymmdd.hhmm 20080901.1944 EDT Comments Object Class Classical Planet Elongation 122.7° Distance Light Time (from Earth) 4.54 AU 37m 47s Distance (from Sun) 5.16 AU Angular Size 43.3" x 40.5" Magnitude -2.5 Central Meridian I/II 229°/166° Altitude 22.8° Moons Starry Night Starter graphic I can see a moon to the east and maybe one to the west in the Golden Gate binocular.

Target Mercury Constellation Vir Category Planet Time yyyymmdd.hhmm 20080901.1953 EDT Comments Object Class Classical Planet Phase Gibbous Elongation 25.3° % Illuminated 69.1% Distance Light Time (from Earth) 1.09 AU 9m 4s Distance (from Sun) 0.466 AU Angular Size 6.16" Magnitude 0.0 Altitude 9.5° Meridian graphic Not Seen

1957 EDT	Civil Twilight ends Nautical Twilight begins
2030 EDT	Nautical Twilight ends Astronomical Twilight begins
2106 EDT	Astronomical Twilight ends
2006 EDT	Moon sets
2019 EDT	Mercury sets
2024 EDT	Venus sets
2035 EDT	Mars sets