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(meteorobs) Aug. 11/12 Perseids by Wanfang Song



***************************
NAMN VISUAL SUMMARY REPORT
***************************
DATE:  August 11/12, 1999       BEGIN:  15:00 UT     END:   18:15 UT
OBSERVER:  Wanfang Song
LOCATION:   Long:  117 d 34' 42" East;   Lat:  40 d 23' 47" North
PLACE:  XingLong, Hebei, China         Elevation:  860m
RECORDING METHOD:  Visual / Ploting
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OBSERVED SHOWERS: 3-letter code; radiant position; radiant diameter

PER ; RA  48 deg.;  DEC +59 deg.;
SDA ; RA 350 deg.;  DEC -13 deg.;
NDA ; RA 335 deg.;  DEC -05 deg.;
CAP ; RA 315 deg.;  DEC -07 deg.;
KCG ; RA 286 deg.;  DEC +59 deg.;
----------------------------------------------------------------------
OBSERVING PERIODS:  0=none seen;  /=shower not watched

PERIOD (UT)   FIELD       TEFF   F    LM  PER  SDA  NDA  CAP  KCG  SPO
15:00-16:01  20d, +60d    0.90  1.00  6.0  10    1    3    0    0    2
16:02-17:04  20d, +60d    0.90  1.00  6.0  12    0    0    2    0    2
17:05-18:15  50d, +40d    0.85              4    1    0    0    1    3
----------------------------------------------------------------------
TOTALS                    1.80             22    1    3    2    0    4
                         (2.65)           (26)  (2)   3    3   (1)  (7)
----------------------------------------------------------------------
MAGNITUDE DISTRIBUTIONS: (for first two sessions)
SHOWER  -6  -5  -4  -3  -2  -1  0  +1  +2  +3  +4  +5  +6  TOTAL
PER      0   0   1   3   0   0  4   4   1   4   1   4   0    22
SDA      0   0   0   0   0   0  0   1   0   0   0   0   0     1
NDA      0   0   0   0   0   0  0   0   1   1   0   1   0     3
CAP      0   0   0   0   0   0  0   0   0   1   0   1   0     2
KCG      0   0   0   0   0   0  0   0   0   0   0   0   0     0
SPO      0   0   0   0   0   0  0   0   2   1   0   1   0     4
----------------------------------------------------------------
TOTAL    0   0   1   3   0   0  4   5   4   7   1   7   0    32
----------------------------------------------------------------
SKY OBSCURED:
        _0_%
FROM: 15:00
  TO: 18:00
--------------------------------------------------------------------- 
DEAD TIME: 00:17 (15s ploting + 10s recording for each meteor)
BREAKS: 17:05-17:20
----------------------------------------------------------------
LIMITING MAGNITUDE:
TIME      STAR AREA      STAR COUNT    LM
15:10         7             14         6.0
17:15         2             13         6.0

MEAN LIMITING MAGNITUDE:   6.0

----------------------------------------------------------------
METEOR DATA:

#   TIME(UT)   MAG  VEL.  COLOR  SHOWER  TRAIN  MAP  ACCURACY
----------------------------------------------------------------
1    15:07:35   +5   3      w      PER    
2    15:10:20   +5.5 4      w      PER
3    15:11:34    0   4      y      PER
4    15:19:50   -3   4      w+y    PER   1 s
5    15:23:45   -3   4      w+y    PER   2 s
6    15:26:03   +1   4      y      SDA   1 s
7    15:32:05   +5   3      w      SPO
8    15:32:47    0   2      w      PER   2 s
9    15:35:08   +3   3      w      NDA
10   15:43:00   +5   3      w      PER
11   15:45:38   +1   4      w+y    PER   0.2 s
12   15:47:40   +2   4      w      NDA   0.5 s
13   15:50:10   -4   5      w+y    PER   1 s
14   15:54:00   +3   3      w      PER
15   15:56:22   +5   4      r      NDA
16   15:59:19   +2   3      w      SPO
17   16:03:10   +5   2      w      CAP
18   16:06:00   +2   3      w      SPO
19   16:11:15   +3   4      w      PER
20   16:12:30   +1   3      w+y    PER   0.5 s
21   16:16:52   +3   3      y      CAP
22   16:29:35   +4   3      w      PER
23   16:32:48   +5   2      w      PER
24   16:35:36   +1   5      w+y    PER   0.5 s
25   16:39:30   +3   2      w      PER
26   16:39:45    0   4      w      PER   0.2 s
27   16:44:42   -3   5      w+y    PER   1 s
28   16:48:00    0   4      w+y    PER
29   16:57:25   +1   4      w      PER   0.5 s
30   17:01:20   +3   3      w+y    PER
31   17:02:50   +2   3      w      PER
32   17:03:30   +3   4      w      SPO
33   17:41:35   -3   5      w+y    PER   1 s
34   17:43:20    0   4      w+y    PER
35   17:48:14   -4   4      w      SPO   2 s
36   17:51:40   +3   3      w      PER
37   17:54:50   +3   4      w      SDA
38   17:55:20   +4   3      w      SPO
39   18:01:10    0   5      w+y    PER
40   18:07:08    0   4      y      KCG
41   18:13:35   +2   2      r      SPO

COLOR: w - white; y - yellow; r - red.

VELOCITY  (VEL.)  SCALE:
0=Stationary
1=Very Slow
2 = Slow
3 = Medium
4 = Fast
5 = Very Fast

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REMARKS BY JIN ZHU:

1. Translated and formated by Jin Zhu from observer's original
   report on meteor visual observation form (In Chinese) by
   Purple Mountain Observatory.
2. All the 41 meteors are ploted, but not on BRNO atlas charts. It's
   larger and one chart is enough for the whole field. It's said
   that it was from Japanese amateur.
3. It was noted that the sky obscured (by clouds) was 5% at 18:04 and
   was 50% at 18:15, and N_star=4 for Nr=2 at 18:15. Which makes the
   3rd session of observations may not be under uniform condition.
   However, the ploting results should still be useful in some sense.
4. The observation was taken during similar period while 3 of other
   observers made their first visual observations at the same site.
   This observer is quite experienced and has about 60-70 hrs meteor
   observations each year in recent years.
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<END OF REPORT>
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