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(meteorobs) Perseids Aug 12/13 from Croatia



Date: 12/13 (day), 08 (month), 2002 (year).  
Begin: 20h 49m.  End: 2h 22m. (UT)
Location: Long. 13deg 43min 48sec East, 
          Lat. 45deg 16min 52sec N, 
          h=246.5 m.  
IMO Code: 23003
Place: Visnjan Observatory, Visnjan.  Country: Croatia
Observer: Tomislav Jurkic.
IMO Code: JURTO

Observed showers (please use IMO three letter code):
Shower     alfa     delta
PER        43 deg  +58 deg

Period (UT)    Teff (h)    F      Lm       Per    Spor   Total   ZHR
20:49-21:47      0.97    1.00    5.50      15       1     16    40 +-10
21:47-22:03       BREAK
22:03-22:55      0.63    1.00    5.60      18       2     20    68 +-16
22:55-23:04       BREAK
23:04-00:05      1.02    1.06    5.25      23       3     26	79 +-17    
00:05-01:30      0.75    1.29    5.15      15       0     15    73 +-19
01:30-02:12      0.70    2.25    5.15      12       0     14    62 +-18
02:12-02:22      0.17   33.33    5.01       2       0
Totals of N      4.24                      85       6     91


Magnitude distributions (for the entire observation):
Shower    -6   -5   -4   -3   -2   -1    0     1    2    3    4    5    6  
 TOTAL
PER	   1    1    3    4    3.5  9.5  5.5  11   13   18   12    3.5  0     85
  
Spor.	   0    0    0    0    0    0    1     0    1    3    1    0    0    
 6


20-minutes periods Number distribution

Period (UT)     PER     SPO     Lm     F     Teff(h)   Remarks
20:49-21:10      3       1     5.50   1.00   0.350     -3 PER with persistent
trail
21:10-21:30      6       0     5.50   1.00   0.333     
21:30-21:47      6       0     5.51   1.00   0.283     -3 PER
21:47-22:03	BREAK
22:03-22:14      7       1     5.53   1.00   0.183     -4 PER with blue color
and fragmentation
22:14-22:28     BREAK
22:28-22:55     11       1     5.63   1.00   0.450
22:55-23:04	BREAK
23:04-23:24      7       1     5.37   1.00   0.333
23:24-23:44      6       0     5.20   1.17   0.333     -4 PER
23:44-00:05     10       2     5.18   1.00   0.350
00:05-00:20      5       0     5.15   1.00   0.250
00:20-00:33      3       0     5.15   1.04   0.220
00:33-01:13	BREAK
01:13-01:30      7       0     5.15   1.74   0.283      -6 PER with blue color

01:30-01:51      6       0     5.15   1.81   0.350      -4 PER seen through
clouds
01:51-02:12      6       0     5.15   2.69   0.350      -5 and -3 PER 
02:12-02:22      2       0     5.01  33.33   0.167

TOTAL           85       6                   4.235


  
General Remarks:
Good weather conditions with some high altitude tin clouds in the first part
of night. Observed meteor groupings of 3-4 meteors within 1 minute or less and
large time gaps between. Two bright Perseids (fireballs) observed with -6 and
-5 mg. The first fireball og -6 mg appeared at 1:14 UT with blue color and the
second one at 1:53 UT with persistent trail. Relatively high number of bright
meteors observed. 
Second part od night from 01:13 UT influenced by heavy clouds when observation
were made mainly through holes in the clouds. Observations had to be stopped
from time to time because of the passing clouds in the first part of night (see
breaks). Observation ended at 2:22 UT due to the totally covered sky.
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