(meteorobs) Observation report 25/26-12-2008
Daniel Grün
daniel_gruen at web.de
Fri Dec 26 08:00:34 EST 2008
Dear all,
it's been a long time since my last real observations, but the clear, dark
skies out at my parents' home I couldn't resist tonight. Ursids seemed quite
active still, at least many of my plots could be traced backwards to an area
very close to the radiant (despite my not even having looked up where exactly
it was before the observation) -- although they seemed a little too fast.
Wishing you all clear skies and merry holidays
Daniel
------------------
Day:26 Month:12 Year:2008
Begin: 2h31m End: 3h33m
Location long. E9d26'25" latit. N48d51'57"
Site: Winnenden-Birkmannsweiler, near Stuttgart
Country: Germany
Observer: Daniel GRUEN IMO code: GRUDA
Any questions? Mail me (daniel_gruen at web.de)
Showers:
.-------------------------------------
| Shw.|alpha|delta|veloc.|a.h|HR |eZHR|
|--------------------------*-------~--|
| ANT | 106d| +22d|sl-med|45d|2.6|11.2|
| COM | 181d| +23d|42km/s|55d| - | -- |
| URS | 217d| +74d|33km/s|52d|5.3|20.0|
| SPO | --- | --- | ---- | - |6.6| -- |
.-------------------------------------
* average radiant height (est.)
~ estimated with r=3.0, deltalm=0.0 and est. radiant height
Periods:
.---------------------------------------------------
|.Period....|Field....|Teff|.F.|.lm.|ANT|COM|URS|SPO|
|..(UT).....|RA...Dec.|..h.|...|.m..|M|N|M|N|M|N|M|N|
|---------------------------------------------------|
|02:31-03:33|230d|+40d|0.76|1.0|5.50|P|2|P|0|P|4|P|5|
.---------------------------------------------------
Magnitude Distribution:
.-----------------------------------------------------.
|Shower.|.-3|.-2|.-1|..0|.+1|.+2|.+3|.+4|.+5|avg.| tot|
|-------|---|---|---|---|---|---|---|---|---|----|----|
|.ANT. .| - | - | - | - |1.0| - | - |0.5|0.5|2.75| 02 |
|.URS. .| - | - | - | - | - |1.5|1.5|1.0| - |2.88| 04 |
|.SPO. .| - | - | - |0.5|1.5|1.0| - |2.0| - |2.30| 05 |
.-----------------------------------------------------.
Train Distribution:
.-----------------------------.
|dur.|5s|4s|3s|2s|1s|<*|no|tot|
|----|--|--|--|--|--|--|--|---|
|ANT |--|--|--|--|--|--| 2| 2 |
|URS |--|--|--|--|--| 1| 3| 4 |
|SPO |--|--| 1|--| 1|--| 3| 5 |
.-----------------------------.
* these trains persisted only for a few tenth of a second
Meteor Data:
.--------------------------------------------------------.
|No.| Time| Mag|Vel|Shw|Train|XBeg|XEnd|YBeg|YEnd|Map|Acc|
|---|-----|----|---|---|-----|----|----|----|----|---|---|
| A |02:38| 2.0| 3 |SPO| --- | 062| 097| 219| 186| 8 | 3 |
| B |02:40| 2.5| 4 |URS| 0.5s| 125| 133| 208| 174| 8 | 1 |
| C |02:45| 3.0| 4 |URS| --- | 018| 014| 228| 159| 8 | 2 |
| D |02:50| 4.0| 3 |URS| --- | 146| 156| 260| 228| 8 | 2 |
| E |02:57| 4.5| 3 |ANT| --- | 051| 014| 169| 180| 2 | 2 |
| F |03:07| 1.0| 2 |ANT| --- | 114| 073| 138| 144| 2 | 1 |
| G |03:14| 4.0| 2 |SPO| --- | 066| 074| 162| 134| 2 | 2 |
| H |03:21| 2.0| 3 |URS| --- | 197| 183| 168| 142| 3 | 3 |
| I |03:22| 4.0| 4 |SPO| --- | 221| 192| 189| 229| 3 | 3 |
| J |03:26| 1.0| 4 |SPO| 1.0s| 308| 256| 098| 114| 3 | 1 |
| K |03:30| 0.5| 4 |SPO| 3.0s| 062| 097| 219| 186| 8 | 2 |
.--------------------------------------------------------.
all coordinates in mm from the lower left corner of the map
subjective velocity scale:
1 - very slow; 2 - slow; 3 - medium; 4 - fast; 5 - very fast
Comments:
Fairly cold and, most unfortunately, very windy tonight. Ursids
still quite active, although this might not be an all too repre-
sentative sample. All in all it was quite worth going out, still
after one hour I felt I had endured the cold and my plotting
attempts despite the winds long enough.
Please note: d = degrees, all times in UT
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