CCD Observing Log of Ritter Observatory
Page  1 of  1

Echelle settings UT Date: 5 Feb 2007
 Observer: NDM
 LDS Settings
X-Disp Tilt: 235.0 λc: Hα Exposure: 20070205.*
 Temp. (°C): -11 RH (%): 70
 Grating: 6 λc: Hα Tilt: 4o
Echelle Tilt: 21.95 Slit: 275 Sky Conditions: Clear, wind W 14 G 20 per NWS
 Slit: 255 Temp.: -93.5oC Focus: 5.81


Exp #
Start Time
(UT)
Dur
(s)
HA
Start
E/L
Object
Sp. Type
V
Mag
ADU's
(/pix)
 Comments
01-05
 23:33
 0
E
 Bias

76
 Or maybe wind SW per flag on UH
06-10
 23:46
 6
E
 Flat

4505
 Temp is from ST-9 w/o cooling
11
 0:05
 300
E
 Th-Ar

103
12
 0:12
 600
 +0:12
 E
 alpha Per
 F5Ib
 1.8
 187
 #13 0:25 Th-Ar ... N-S pointing is bad*; telescope went
14
 0:58
 1800
 -1:15
 E
 zeta Tau
 B2IIIpe(sh)
 3.0
 169
 about a degree and a half too far. Set offset; now large in dec.
15
 1:30
 300
E
 Th-Ar


Have seen this before in very cold conditions.
16
 1:48
 900
 -0:24
 E
 epsilon Ori
 B0Ia
 1.7
 165
 #17 2:05 Th-Ar
18
 2:17
 300
 +0:27
 E
 beta Ori
 B8Ia
 0.1
 182
 #19 2:25 Th-Ar
20
 2:37
 1200
 +0:21
 E
 zeta Ori
 O9.5Ib
 2.0
 170
 #21 3:00 Th-Ar
22
 3:12
 1800
 -0:50
 E
 beta CMi
 B8Ve
 2.9
 133
 #23 3:45 Th-Ar
24
 4:03
 300
 -0:18
 E
 beta Gem
 K0IIIb
 1.1
 183
 No more bright targets. Seeing pretty bad. Close.
25
 4:10
 300
E
 Th-Ar

104
 Thin clds, very light snow after closing.
26-30
 4:18
 0
E
 Bias

78
 Back at zenith, leveled telescope, centered encoders.
31-35
 4:32
 6
E
 Flat

4313
 *Telescope outruns encoders on long slews in dec.