by Rob Hawley
a) Location
Coyote Lake County Park
b) Type of telescope
Meade 10" f/10 SCT
c) Limiting mag
a number of us estimated the visual limiting magnitude at 5.0 to 5.3
d) Transparency
viewed objects down to 11. Did not try for anything dimmer.
e) Steadiness
@ 7PM between IV and III on the CSC scale when looking to zenith.
Possibly better later in the evening.
Sirius had a noticeable twinkle all night.
f & g) Temperature Wind Relative humidity
7PM 52 5-10 53
8PM 48 light 67
9PM 45 calm 92 +- 7
10PM 43 calm 83 +- 7 dew forming on glass
11PM 41 calm 88 +- 7
Weather Forecasts
CSC (morning forecast)
Transparency & seeing average
CSC (evening forecast)
Transparency above average & seeing good
NWS Prototype Digital forecast for 3-5
6pm 9pm Mdnt 3am 6am
Sky 15 15 15 15 15
Temp 52 48 45 43 44
Dpnt 42 40 39 38 39
RH 68% 73% 79% 82% 82%
Wind SW SW NW NW N
7 7 2 2 1
SJC Actual
Wind vis cloud temp dew rh press
05 10:53PM N 0 10 clr 50 45 83 30.10
05 09:53PM N 0 10 clr 51 46 83 30.10
05 08:53PM N 7 10 clr 52 46 80 30.08
05 07:53PM NW 10 10 clr 53 47 80 30.06
05 06:53PM NW 9 10 few 8000 56 47 72 30.04
SJC Terminal Area Forecast
Sky clear
This was another practice run for the Messier Marathon. Viewed M 46, 3, 106, 94, 65, 66, and 63 and NGC 3628 and 2438, and Beta Mon. Took a look at Jupiter at 7PM and at 11:30. At 11:30 the image was steady at 250x with a blue filter.