(meteorobs) HALWA at NJAA Aug 31-Sep 2

[meteoreye at comcast.net]

This e-mail will cover 3 consecutive nights.  For all of them, the observations were at the NJAA Observatory. 74d53m53s W, 40d40m52s N. 253 Meters. IMO site 25186.

All meteors were plotted, which allowed me to reanalyze the data in light of the unexpected SPE activity.

Plot times were measured directly from the audio tape to derive the Teff.

Since the Sept 9 SPE outburst and voluminous IMO video data suggests a radiant 15 degrees from the IMO working list positions, I have used that radiant for shower associations. Radiant positions are listed for each morning. I projected the video radiant backward beyond the start of activity to determine the daily radiant position. As I say in the NAMN notes, anyone can request these positions in an excel worksheet.

All plotting was done using an alignment cord for maximum accuaracy.

Angular velocity was considered in shower association. F=1.00 throughout.

All times and dates are UT.

UT DATE Aug 31

Showers observed:
Shwr, RA, DEC, Velocity

ANT 350, -03, v30
SDA 006, -07, v41
ERI  051, -15, v59 (old IMO ERI radiant, IAU shower #209 EER)
SPE 088, +48, v61
AUR 068, +48, v65
SPX 066, +01, v57 (none observed)
SUM 261, +83,  (none observed)
SSL 111, +39, v52 (none observed)

UT Time,      LM,    Teff,   ANT, SDA, ERI, SPE, AUR, SPO, TOT, Met/Hr
0530-0624  +5.70  0.842    2      0        1       0       1       0        4        4.8
0624-0718  +5.67  0.853    1      0        0       0      1       1        3        3.5
0718-081  +5.70  0.847    0      1        1       1       1       0        4        4.7
0812-0921  +5.71  0.857    1      0       2       1       2       5       11       12.8
-----------------------------------
0530-0921  +5.70   3.398    4      1       4       2        5       6       22       6.5

Totals 3.398 Teff.

22 Meteors, 6.5/Hr Avg Mag +2.18

4 ANT (1.2/Hr) Avg Mag +2.25
1 SDA (0.2/Hr) Mag +1
4 ERI (1.2/Hr) Avg Mag +3.50
2 SPE (0.6/Hr) Avg Mag +2.25
5 AUR (1.5/Hr) Avg Mag +1.50
6 SPO (1.8/Hr) Avg Mag +2.00

Distant thunderstorms cause many bright full sky flashes.

-----------------------


UT Date Sept 01

Showers:

ANT 351, -02, v30
ERI  052, -15, v59
SPE 034, +37, v61
AUR 068, +48, v69
SUM 080, +86, +38 (none observed)
SSL 112, +57 (none observed)

UT Time       LM   Teff   ANT  ERI SPE AUR SPO   TOT   Met/Hr
0520-0620  +5.67  0.935  2      0     1      1       1        5      5.3
0620-0720  +5.65  0.953  0      0     1      0       3        4      4.2
0720-0820  +5.71  0.960  0      0     1      0       2        3      3.1
0820-0920  +5.72  0.983  0      0     0     1        1       2       2.0
---------------------
0520-0920   +5.69   3.932   2     0     3      2     7       14      3.7

Totals 14 meteors (3.7/Hr) Avg Mag +2.43

2 ANT (0.5/Hr) avg mag +1
3 SPE (0.8/Hr) avg mag +3
2 AUR (0.5/Hr) avg mag +3
7 SPO (1.8/Hr) avg mag +2.43

----------------------------------------------

UT Date Sept 2 2008

Showers:

AUR 068, +48, v69
ERI 052, -15, v59
SPE 036, +37, v61
ANT 352, -02, v30
SPX 066, +06, v58 (none observed)
SUM 079,+63,  (none observed)
SSL 113, +36, v52 

UT Time      LM      Teff     AUR   ERI   SPE   ANT   SSL   SPO   TOT   Met/Hr
0516-0618  +5.57  0.990     0       0        0        3        0        0      3     3.0
0618-0720  +5.51  0.990     2      0        0       1        0         1      4      4.0
0720-0820  +5.51  0.967     0       0       0        1       0         2       3     3.1
0820-0922  +5.62   0.953    1       1       1       0        1        3        7     7.3
------------------------------
0516-0922   +5.56   3.900    3      1       1        5       1        6       17      4.4

Totals  3.900 Teff (4.4/Hr) Avg Mag +3.06

3 AUG (0.8/Hr) avg mag +3.67
1 ERI (0.3/Hr) Mag +3
1 SPE (0.3/hr) Mag +2.5
5 ANT (1.3/Hr) Avg mag +2.92
1 SSL (0.3/hr) Mag +3
6 SPO (1.5/Hr) Avg Mag +2.92   

Wayne