(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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