Observing Project 4A The Observing

Observing

Log

April 1

3,2003

Object

Time

Alt

Azimuth

Mag

Size

Seeing

Remarks

Mercury

20:29

8

275

0.6

8.0"

2

31% Illuminated, Poor seeing

M42

21:29

18

240

2.4

3

Beautiful rich detail. All Trap. stars visible

Saturn

21:45

26

280

0.2

17.1"

4

Titan, Rhea, Tethys, Dionne, Rings Open 26 Deg

M51

22:00

80

360

8.9

4

Bright cores, arms visible with averted vision

M44

22:10

50

260

3.9

1' 10"

4

Bright open cluster

Jupiter

22:15

55

255

-2

38"

4

4 moons, no red spot tonight

Gamma

22:25

60

220

2.0/3.1

4

Yellow/yellow binary

Leonis

6.0" split

Moon

22:50

10

130

-11.9

31' 50"

3

Nearly full moon, 89% illuminated.

An observing log taken in the field should be simple and concise. You are taking it as you observe so keep it small and brief. It should be just enough to jog your memory from the night before as you read it. As I go through this log, even years after I took these notes, it helps me to remember key things I saw in the sky that night. This can be extra helpful when dealing with objects that change over time, like comets and planets. Note the vital statistics, such as what you saw, when you saw it, where was it in the sky, how bright and how big it was, how good the seeing (1-5, with 5 being best) was and anything noteworthy. Each one of these lines was typed in Excel in the field in just a few seconds.

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