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(meteorobs) Aug. 11/12 Perseids by Wanfang Song
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NAMN VISUAL SUMMARY REPORT
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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.;
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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
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TOTALS 1.80 22 1 3 2 0 4
(2.65) (26) (2) 3 3 (1) (7)
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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
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TOTAL 0 0 1 3 0 0 4 5 4 7 1 7 0 32
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SKY OBSCURED:
_0_%
FROM: 15:00
TO: 18:00
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DEAD TIME: 00:17 (15s ploting + 10s recording for each meteor)
BREAKS: 17:05-17:20
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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
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METEOR DATA:
# TIME(UT) MAG VEL. COLOR SHOWER TRAIN MAP ACCURACY
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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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