13 June 2008

Observing Location	CDLD
Observational Period	1030-1045 EDT
Atmospheric Conditions	Cloud Cover Clear Temperature 74° F Wind Light Breeze Humidity Low Barometric Pressure 30.29" Hg Steady Feels Like It is clear but the sky is not as blue as it should be so I suspect haze again. It is supposed to be mostly cloudy tonight. Transparency Good Seeing I
Instruments	Brunton 8x21 compact binocular w/Welco gold shade 14 welder's filter - Charlie
Observing Party	Charlie Ridgway

Target Sunspots Constellation Tau Category Solar Time yyyymmdd.hhmm 20080613.1030 EDT Comments Distance Light Time 1.01 AU 8m 27s Angular Size 31' 32.7" Altitude 55.0° Heliographic Latitude (B0) +0.89° Heliographic Longitude (L0) 309.46° Parallactic Angle (P) -10.25° Carrington rotation number (CR) 2071 Group 998 is still in the SOHO images but looks to me like it has shrunk since what I remember from yesterday. I can’t see it in my optics.   Groups Spots R North 0 0 0 South 0 0 0 Total 0 0 0 R = (Groups * 10) + Spots)

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Observing Location	MO
Observational Period	2130-2315 EDT
Atmospheric Conditions	Cloud Cover Clear becoming hazy Temperature 71° F Wind Calm gusting to Light Breeze Humidity High Barometric Pressure 30.11" Hg Falling Feels Like Mild but becoming increasingly humid. As the night progressed the air became increasingly humid and the transparency decreased as it became hazy. Transparency Good decreasing to Fair Seeing II
Instruments	SAR: Coulter CT-100 Newtonian reflector - Charlie Celestron Omni 20mm (21x) Celestron Omni 2x Barlow
Observing Party	Charlie Ridgway

Nautical Twilight begins
Astronomical Twilight ends

2028 EDT	Sunset Civil Twilight begins
2101 EDT	Civil Twilight ends Nautical Twilight begins
2144 EDT

Target Saturn Constellation Leo Category Planet Time yyyymmdd.hhmm 20080613.2145 EDT Comments Saturn looks creamy. I can make out the rings as a thin line through the disk of the planet. Starry Night Starter graphic Object Class Classical Planet Elongation 69.8° E Distance Light Time (from Earth) 9.61 AU 1h 20m Distance (from Sun) 9.31 AU Angular Size 17.2" x 15.3" Ring Angular Size 39" x 6.23" Ring Inclination 9.2° Magnitude +0.8 Altitude 31.1° Starry Night Starter graphic

Target Mars Constellation Leo Category Planet Time yyyymmdd.hhmm 20080613.2150 EDT Comments Mars looks brighter in the telescope than Saturn does even though it is actually a magnitude dimmer and lower on the horizon. Object Class Classical Planet Elongation 56.3° E Distance Light Time (from Earth) 1.99 AU 16m 35s Distance (from Sun) 1.66 AU Angular Size 4.7" Magnitude 1.6 Central Meridian 73° Altitude 22.7°

Target Moon Constellation Vir Category Lunar Time yyyymmdd.hhmm 20080613.2200 EDT Comments Lunation 1057 Phase Waxing Gibbous Age 10d 6h 36m Distance Light Time (from earth) 400,629 km 1.33s Elongation 129.0° E % Illuminated 81.7% Morning Terminator Colongitude (λ E) 35.2° Evening Terminator Colongitude (λ W) 215.2° Libration in Latitude 7° 03' Libration in Longitude 4° 17' Magnitude -11.3 Angular Size 29.83' Altitude 31.6° Virtual Moon Atlas graphic Terminator In Shadow Feature Diameter/Length (km); Class In Sunlight   Carpenter 59; Old >>>   Bianchini 38; 1 >>>   Sinus Iridum 236 >>> <<< Sharp 39; 1   <<< Montes Jura 422 >>> <<< Mare Imbrium 1123 >>>   Promontorium Heraclides 50 >>> <<< Delisle 25; 1 >>>   Diophantus 17; Young >>>   Mons Vinogradou 25 >>> <<< Braylen 14; Young     T. Mayer 33; Old >>> <<< Kepler 31; 1 >>>   Encke 28; 5 >>>   Mons Riphaeus 189 >>> <<< Wichmann 10; Young >>> <<< Gassendi 101; 5     Agatharchides 48; 5 >>> <<< Mare Humorum 389 >>>   Campanus 48; 5 >>> <<< Rimae Hippalus 191 >>> <<< Rupes Kelvin 78 >>> <<< Rupes Kelvin 78 >>>   Capuanus 59; 5 >>> <<< Schiller 180; 3 >>>   Moretus 111; 1 >>>   Curtis 95; Very Old >>> There is a nice crescent of three craters beneath Bullialdus – Bullialdis A (26 km), Bullialdus B (21 km) and K¨o;nig (23 km). The western interior of Sunus Iridum, Montes Jura, is strongly lit and very bright. Helicon (24 km; 1) and Le Verrier (20; 1) are visible but almost the same color as the Mare Imbrium floor around them. Rays are becoming more visible Less of Mare Smythii is visible tonight

2224 EDT	Astronomical Twilight ends
2250 EDT	My view just went soft. The air is very moist and there is noticeable haze around the Moon. I can’t find any dewing on the optics. The mosquitoes are becoming active also which is unusual this late after sunset.

It wasn’t until midnight when I was home and updating my field notes that I realized that I had gotten through the whole day oblivious to the fact that it was Friday the 13^th.