(meteorobs) NWM 1974 and 1977 Leonid data
Mikhail Maslov
ast0 at mail.ru
Sat Mar 12 02:00:13 EST 2005
Hello, Morman and all,
Many thanks for these data. They show at least for 1974 significant
increase. My nominal ZHR estimation for 1974 is 140, rates were
obviously some lower. It could mean that my current method of ZHR
estimation for old trails give too high results and needs reassigning.
However, for relation purposes, the basic model gives ZHRex=435 in
2008 and up to 500 in 2009. What will be really. Now it is very
difficult to say, I think ZHR=100 would be very not bad. And these
years will be very important for further building activity function of
trails.
Mikhail Maslov
NWMI> 1974 Nov 16/17, 1974 Nov 17 UT, lat 27.0 N, long 82.0 W, south of Punta
NWMI> Gorda, Florida, USA
NWMI> 1016 - 1128 EST 316 - 428 UT Teff 1.20 F1.0 LM 6.0 0 LEO 12
NWMI> TAU 5 SPO 17 total sky hazy
NWMI> 1128 - 1228 EST 428 - 528 UT Teff 1.00 F1.0 LM 6.5 1 LEO 7
NWMI> TAU 3 SPO 11 total
NWMI> 1228 - 128 EST 528 - 628 UT Teff 1.00 F1.0 LM 7.0 3 LEO 9
NWMI> TAU 4 SPO 16 total
NWMI> 128 - 228 EST 628 - 728 UT Teff 1.00 F1.0 LM 7.0 17 LEO 2
NWMI> TAU 7 SPO 26 total
NWMI> 228 - 328 EST 728 - 828 UT Teff 1.00 F1.0 LM 7.0 22 LEO 5
NWMI> TAU 10 SPO 37 total
NWMI> 328 - 428 EST 828 - 928 UT Teff 1.00 F1.0 LM 7.0 21 LEO 3
NWMI> TAU 5 SPO 29 total
NWMI> 428 - 528 EST 928 - 1028 UT Teff 1.00 F1.0 LM 7.0 40 LEO 4
NWMI> TAU 10 SPO 54 total
NWMI> 528 - 605 EST 1028 - 1105 UT Teff 0.62 F1.0 LM -- 9 LEO 2
NWMI> SPO 11 total dawn starts 1030 UT
NWMI> LEO magnitudes :
NWMI> 428 - 528 UT +1m earthgrazer at 512 UT (1212 EST) , orange, 120 degrees,
NWMI> 8s duration, train 3 sec, had a heavy nebulous envelope.
NWMI> 528 - 628 UT : +2 (1) +3 (0) +4 (2)
NWMI> 628 - 728 UT : -2 (1) -1 (0) 0 (2) +1 (4) +2 (1) +3 (4) +4 (4) +5 (1)
NWMI> 728 - 828 UT : -3 (2) -2 (2) -1 (0) 0 (3) +1 (4) +2 (5) +3 (3) +4 (2)
NWMI> +5 (0) +6 (1)
NWMI> 828 - 928 UT : -5 (1) -4 (0) -3 (0) -2 (0) -1 (1) 0 (1) +1 (6) +2
NWMI> (2) +3 (4) +4 (3) +5 (2) +6 (1)
NWMI> 928 - 1028 UT : -5 (0) -4 (1) -3 (0) -2 (0) -1 (1) 0 (5) +1 (8) +2
NWMI> (6) +3 (4) +4 (5) +5 (7) +6 (2)
NWMI> unclassified - saw train only (1)
NWMI> sporadic magnitudes only in sky LM 7.0 :
NWMI> 528 - 1028 UT : -2 (1) -1 (0) 0 (1) +1 (0) +2 (9) +3 (6) +4 (9) +5 (9)
NWMI> +6 (1)
NWMI> ________________________
NWMI> 1977 Nov 15/16, 1977 Nov 16 UT, lat 25.75 N, long 80.5 W, west of Miami,
NWMI> Florida, USA
NWMI> 222 - 322 EST 722 - 822 UT Teff 1.00 F1.0 LM 7.0 5 LEO 1
NWMI> TAU 1 NTA 8 SPO 15 total
NWMI> 322 - 422 EST 822 - 922 UT Teff 1.00 F1.2 LM 7.0 8 LEO 1
NWMI> STA 1 NTA 9 SPO 19 total 20% cirrus
NWMI> 422 - 522 EST 922 - 1022 UT Teff 1.00 F1.0 LM 7.0 13 LEO 9
NWMI> SPO 22 total
NWMI> LEO magnitudes :
NWMI> 722 - 822 UT : +2 (2) +3 (2) +4 (1)
NWMI> 822 - 922 UT : -1 (1) 0 (0) +1 (2) +2 (0) +3 (2) +4 (1) +5 (2)
NWMI> 922 - 1022 UT : -1 (1) 0 (1) +1 (0) +2 (3) +3 (6) +4 (1) +5 (0) +6 (1)
NWMI> sporadic magnitudes :
NWMI> 722 - 1022 UT : +1 (2) +2 (7) +3 (5) +4 (6) +5 (4) +6 (2)
NWMI> ________________
NWMI> 1977 Nov 16/17, 1977 Nov 17 UT, lat 25.75 N, long 80.5 W, west of Miami,
NWMI> Florida, USA
NWMI> 250 - 315 EST 750 - 815 UT Teff 0.42 F1.0 LM 7.0 1 LEO 1
NWMI> TAU 1 STA 5 SPO 8 total
NWMI> 435 - 500 EST 935 - 1000 UT Teff 0.42 F1.0 LM 7.0 3 LEO 5
NWMI> SPO 8 total
NWMI> LEO magnitudes :
NWMI> 750 - 815 UT : +3 (1)
NWMI> 935 - 1000 UT : 0 (1) +1 (0) +2 (0) +3 (1) +4 (0) +5 (1) +6 (0)
NWMI> Sporadic magnitudes for both periods above :
NWMI> +2 (3) +3 (2) +4 (2) +5 (3)
NWMI> __________________
NWMI> 1977 Nov 16/17 had variable cloudiness so I am using only the 2 clear
NWMI> periods. The night before had much better Leonid rates. I was wondering
NWMI> how long it would be before somebody would investigate the good 1974 Leonid
NWMI> display. That was the last of the 1960's series. I saw a -12m Leonid 1979
NWMI> Nov 22, well after the max. 1983 was memorable in having a number of -2m
NWMI> Leonids. No recollection of anything else interesting until 1996 although
NWMI> I did not see the Leonids every year. Who has, for that matter?
NWMI> The work pace is in a temporary slowdown. After the heavy tax peak in late
NWMI> Jan - early Feb it gets quieter in March before the final rush in early
NWMI> April. Been a rough year for illnesses. I caught a mild cold in late Jan,
NWMI> out of work one day, but had a stuffy head for nearly a month
NWMI> afterwards. Usually it clears up after just a week. Almost everyone else
NWMI> at the office went through the mill also. Same symptoms were widespread
NWMI> among other people so I wasn't alone.
NWMI> Norman
NWMI> Norman W. McLeod III
NWMI> Staff Advisor
NWMI> American Meteor Society
NWMI> Fort Myers, Florida
NWMI> nmcleod at peganet.com
NWMI> ---
NWMI> Mailing list meteorobs
NWMI> meteorobs at meteorobs.org
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