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(meteorobs) Perseid data Aug 12-13 LANMA (Netherlands)



Dear All,

A nice Perseid display here in the Netherlands, but iffy weather. A
northwest wind over the warm North Sea and lake IJssel generated fields of
clouds that went landinwards. Thus, observing was a coming and going of
clouds, Lim. mags. went up and down, periods with full or partial cloud
cover and some clear periods. Below a table with my data with cloud
percentage not more than 25%. Clouds made us stop at 0h UT.

A nice activity nevertheless, preliminary calculations from data by Koen
Miskotte and me suggest rather normal Perseid Zenith Hourly rates in the
order of 60-80. Many rather bright Perseids, but not abnormal I suggest. No
real signs of an outburst. Koen noted 2-3 fireballs in very early twilight
though.

Most beatifull meteor was a kappa Cygnid appearing at 23:05:56 UT, -5 with
flares and bright blue. Still enjoyed this night. Data in table below.

- Marco Langbroek
   Dutch Meteor Society (DMS)


Date: August 12/13 1999
Loc.: Biddinghuizen, the Netherlands,  52d 29' N,  5d 37' E
Obs.: Marco Langbroek            LANMA

UT                  Teff    Lm  Per  kCyg  dAqr  Spo    F
20:20-20:45   0.35   5.7     7       0        0       0    1.00
21:02-21:10   0.13   6.1     3       0        0       0    1.25
21:10-21:20   0.15   6.7     7       1        0       0    1.10
21:20-21:37   0.27   6.5     6       1        0       3    1.10
22:08-22:40   0.50   6.8    17      0        0       4    1.00
22:48-23:27   0.58   6.4    26      2        0       7    1.00
23:49-00:00   0.18   6.3      5      0        1       3    1.00

TOTAL          2.17  <6.4>  71     4        1       17                 tot. 93

                         -5/      -3   -2   -1   0   +1   +2   +3   +4   +5
  +6          <m>
Sporadics           0       1    0    0   0      2    4     2      5      3
    0           2.82
Perseids             0       2    1    3    8     7    9    14     19    6
   2           2.45
k Cygnids            1       0    0    0   1      1    0     0       1
0     0
d Aquarids           0       0     0   0    0     0     0     1      0
0     0



       
Casper ter Kuile, Dutch Meteor Society (DMS)
Akker 145, NL-3732 XD, De Bilt, The Netherlands
Tel. +(31)-30-2203170, Fax. +(31)-30-2202695
GSM-BEN: +(31)-6-24242445, GSM-KPN: +(31)-6-53270844
E-mail_1: pegasoft@accu.uu.nl
E-mail_2: dms-web@wxs.nl
DMS website: http://home.wxs.nl/~dms-web/index.html
 
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