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(meteorobs) Observation 31/07/2003
Hi!
This is my report from last night. After too many clouds and too
little sleep the night before, I went out again with a friend.
Greetings
Daniel Gruen
-----
Day:31-01 Month:07-08 Year:2003
Begin: 31.07., 21h57m
End: 1.08., 0h48m
Location long. E9d26'20" latit. N48d51'55"
Site: Winnenden-Birkmannsweiler, near Stuttgart
Country: Germany
Observer: Daniel GRUEN IMO code: GRUDA
Any questions? Mail me (daniel_gruen@webdot de)
Showers:
-----------------------------------
| Shw |alpha|delta| Shw |alpha|delta|
|-----------------------------------|
| CAP | 305d| -11d| ACY | 310d| +49d|
|-----------------------------------|
| PER | 25d| +54d| NDA | 325d| -08d|
|-----------------------------------|
| SIA | 325d| -17d| SDA | 339d| -17d|
|-----------------------------------
| SPO | --- | --- |
-----------------
Periods:
-------------------------------------------------------------------
| Period |Field |Teff| F | lm |CAP|ACY|NDA|SIA|SDA|PER|SPO|SPO|
| (UT) |RA Dec | h | | m |M|N|M|N|M|N|M|N|M|N|M|N|M|N|M|N|
|-----------------------------------------------------------------*-|
|21:57-22:17|310d|+45d|0.31|1.1|5.07|P|0|P|0|P|0|P|0|P|1|C|0|P|1|C|0|
|-------------------------------------------------------------------|
|22:37-23:45|320d|+39d|1.01| 1 |5.07|P|2|P|0|P|2|P|0|P|1|C|3|P|2|C|2|
|-------------------------------------------------------------------|
|23:58- 0:48|345d|+43d|0.73| 1 |4.83|P|0|P|0|P|1|P|0|P|2|C|4|P|4|C|0|
-------------------------------------------------------------------
* these are the meteors I didn't plot, either because there were
too many at a time; they might as well be shower meteors
Magnitude Distribution:
1st period:
-------------------------------------------
|Shower| -2| -1| 0| +1| +2| +3| +4| +5| tot|
|------|---|---|---|---|---|---|---|---|----|
| SDA | | |0.5|0.5| | | | | 1 |
| SPO | | | | | |0.5|0.5| | 1 |
-------------------------------------------
2nd period:
-------------------------------------------
|Shower| -2| -1| 0| +1| +2| +3| +4| +5| tot|
|------|---|---|---|---|---|---|---|---|----|
| CAP | |0.5|0.5| | | |1.0| | 2 |
| NDA | | | | | |1.0|1.0| | 2 |
| SDA | | | | | | |1.0| | 1 |
| PER | | | | |1.0|2.0| | | 3 |
| SPO | | |0.5|1.5|0.5|1.0|0.5| | 4 |
-------------------------------------------
3rd period:
-------------------------------------------
|Shower| -2| -1| 0| +1| +2| +3| +4| +5| tot|
|------|---|---|---|---|---|---|---|---|----|
| NDA | | | | | |1.0| | | 1 |
| SDA | | | | |0.5|1.5| | | 2 |
| PER | | | |1.0|0.5|2.0|0.5| | 4 |
| SPO | | | |0.5|1.0|1.5|1.0| | 4 |
-------------------------------------------
total:
-------------------------------------------
|Shower| -2| -1| 0| +1| +2| +3| +4| +5| tot|
|------|---|---|---|---|---|---|---|---|----|
| CAP | |0.5|0.5| | | |1.0| | 2 |
| NDA | | | | | |2.0|1.0| | 3 |
| SDA | | |0.5|0.5|0.5|1.5|1.0| | 4 |
| PER | | | |1.0|1.5|4.0|0.5| | 7 |
| SPO | | |0.5|2.0|1.5|3.0|2.0| | 9 |
-------------------------------------------
Train Distribution:
1st Period:
--------------------
|dur.|2s|1s|<*|no|tot|
|----|--|--|--|--|---|
|SDA | | | | 1| 1|
|SPO | | | | 1| 1|
--------------------
2nd Period:
----------------------
|dur.| 2s| 1s|<*|no|tot|
|----|---|---|--|--|---|
|CAP | | | | 2| 2|
|NDA | | | | 2| 2|
|SDA | | | | 1| 1|
|PER | | | 1| 2| 3|
|SPO |0.5|0.5| | 3| 4|
----------------------
3rd Period:
--------------------
|dur.|2s|1s|<*|no|tot|
|----|--|--|--|--|---|
|NDA | | | | 1| 1|
|SDA | | | | 2| 2|
|PER | | | | 4| 4|
|SPO | | | | 4| 4|
--------------------
total:
----------------------
|dur.| 2s| 1s|<*|no|tot|
|----|---|---|--|--|---|
|CAP | | | | 2| 2|
|NDA | | | | 3| 3|
|SDA | | | | 4| 4|
|PER | | | 1| 6| 7|
|SPO |0.5|0.5| | 8| 9|
----------------------
* these trains persisted only for a few tenth of a second
Meteor Data:
(caution: I changed the order of the coordinates from
XBeg-YBeg-XEnd-YEnd to XBeg-XEnd-YBeg-YEnd)
--------------------------------------------------------
|No.| Time| Mag|Vel|Shw|Train|XBeg|XEnd|YBeg|YEnd|Map|Acc|
|---|-----|----|---|---|-----|----|----|----|----|---|---|
|122|22:10| 3.5| 2 |SPO| - | 155| 137| 88| 64| 3 | 3 |
|123|22:16| 0.5|2-3|SDA| - | 329| 290| 34| 75| 1 | 2 |
|---|-----|----|---|---|-----|----|----|----|----|---|---|
|124|22:41| 2.5| |SPO| - | | | | | | |
|125|22:41| 3.5| |SPO| - | | | | | | |
|126|22:41| 4.0|3-4|NDA| - | 219| 243| 186| 207| 6 | 3 |*
|127|22:45| 3.0|4-5|PER| - | | | | | | |+
|128|22:49| 1.0|1-2|SPO|1.5s | 218| 250| 88| 74| 1 | 2 |
|129|22:58|-0.5|1-2|CAP| - | 70| 79| 131| 149| 3 | 3 |
|130|23:07| 4.0|1-2|CAP| - | 209| 203| 198| 218| 6 | 1 |
|131|23:20| 4.0|3-4|SDA| - | 166| 190| 222| 278| 6 | 3 |
|132|23:28| 2.5| 3 |PER| <1s | | | | | | |
|133|23:31| 2.5| 4 |PER| - | | | | | | |
|134|23:35| 3.0|2-3|NDA| - | 91| 63| 217| 252| 6 | 3 |
|135|23:41| 0.5| 3 |SPO| - | 148| 111| 184| 184| 6 | 2 |
|---|-----|----|---|---|-----|----|----|----|----|---|---|
|136| 0:00| 1.0| 4 |PER| - | | | | | | |
|137| 0:06| 2.5| 3 |PER| - | | | | | | |~
|138| 0:06| 3.5| 3 |PER| - | | | | | | |~
|139| 0:13| 3.5|3-4|SPO| - | 277| 306| 109| 91| 1 | 2 |+
|140| 0:19| 3.0| 3 |SDA| - | 344| 281| 32| 83| 1 | 2 |
|141| 0:22| 3.5| 5 |SPO| - | 186| 218| 322| 332| 6 | 2 |
|142| 0:26| 2.5| 3 |SDA| - | 178| 135| 206| 245| 1 | 3 |
|143| 0:30| 1.5|2-3|SPO| - | 184| 170| 123| 101| 1 | 1 |
|144| 0:38| 3.0|4-5|PER| - | | | | | | |
|145| 0:40| 3.0|4-5|NDA| - | 339| 294| 83| 98| 1 | 2 |
|146| 0:45| 2.5|3-4|SPO| - | 249| 285| 97| 59| 1 | 2 |
--------------------------------------------------------
enumeration starts in the 20/02/2003 session
all coordinates in mm from the lower left corner of the map
velocity scale:
1 - very slow; 2 - slow; 3 - medium; 4 - fast; 5 - very fast
* it's not so clear wheather this is a NDA or a SIA
+ the time is only an estimate, I forgot to look on my watch
~ almost with the same angle from the radiant
Comments: Against my plans from the last observation, I
plotted again last night and activity was not too high to
do so. Combined with a cassette recorder, the dead time was
still bearable. #137 and #138 are what I call "twin meteors",
nearly at the same time with nearly the same angle from the
same radiant. I have often noticed such events with the
Perseids.
Please note: d = degrees
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