From: Mike Linnolt, Haleakala NP, Maui, Hawaii
Date: Fri, 17 Nov 2000 09:19:31 -1000

I just returned from an overnight observing session up on Haleakala
on Maui. I decided to do it last night rather than Friday night
because of uncertain weather coming in.
Of course, the mid-Pacific region was not favored for the Leonids
this year, so I was not surprised by the poor showing, despite good
observing conditions. The radiant rose here around 10:00 UT, about
2 hours past the expected peak time.

Below is my Quick report I submitted to IMO. A full detailed report
will be coming later.

I hope others will see some good action Friday night. For myself, I
will be catching up on sleep... Cant pull 2 all-nighter in a row
anymore!

======================
Observer: Mike Linnolt (LINMI)
Date: Nov. 17, 2000
LOC: Haleakala NP, Maui, HI (20? 40' N, 156? 20m W)

Begin End Teff  LM LEO others
-------------------------------
0730-0752 0.33  6.6 0 5
0804-0836 0.50 6.6 0 10
0858-0933 0.50 6.1 1 7
0950-1024 0.50 5.7 2 5
1040-1113 0.50 5.9 3 9
1125-1158 0.50 5.9 8 5
1245-1318 0.50 5.8 10 6
1330-1402 0.50 5.7 9 7
1414-1445 0.50 5.5 8 5

---
Date: Sat, 18 Nov 2000 15:02:02 -1000

Finally got my full report of Thursday nights session completed.
The 2 maxima of LEO presented me with a dilemma. When I go to
Haleakala from Oahu the logistics prevent me from sleeping that
night, so no way to observe 2 nights in a row after midnight. But,
looking at the reports coming in, it appears the 2nd maximum
around 8UT on the 18th wouldn't have yielded too much more
meteors out here, because the radiant didn't rise until well past that
maximum as well.

My all-night session on the 16/17 at the summit of Haleakala was
a good one. Except for somewhat "stormier" conditions than usual,
with pretty stiff winds and periods of fog blowing past, the sky was
excellently transparent and allowed good LM even while the moon
was up.

My LEO ZHR peaked early at 74.5 around 11:40 UT, as the radiant
rapidly rose in the east, and declined steadily thereafter to 38.2 by
14:45 UT. I missed the real peak around 08:00 UT because the
radiant was still below the horizon then. Their mean magnitude
ranged from +3.0 to +3.9. Very few bright ones were seen, only
one -3 and -2 out of 41 LEO stand out in this regard.

Interestingly, at around the peak of the LEO (8 UT) I was observing
under perfectly clear, moonless LM=6.6 sky, and I saw a definite
enhancement of very faint (mag 5-6) SPO. I don't know if this is just
a random event, or there really is some connection with the LEO
shower in this regard! Has anyone else ever noticed such
background enhancement at maximum when the main shower
radiant is well below the horizon and thus invisible?

Also, a couple of LEO appeared with the radiant still below the
horizon. The first one I saw with the radiant about -8?. I suppose
this is possible, because of the radiant zone is about this many
degrees across, so a meteor coming from the upper most part of
this zone would be very close to the horizon. Also, it should be
possible to see a meteor from a radiant slightly below the horizon.
If it was an extreme grazer passing slightly upward angle with
respect to my local horizon, it could burn up at a sub-earth point
several hundred km from my location, but would still be visible at a
low elevation.


And, there was other meteor activity as well. I guess with the less
than spectacular LEO show, I was able to pay good attention to
the other minor showers. The Taurids were steadily active all night,
with an overall ZHR of 8.0. The Delta Eridanids were also active
with mean ZHR of 6.7. Only one Zeta Puppid was seen.

Now lets start analyzing all the data!
Mike Linnolt.

REPORT FOLLOWS:
================
OBS: Mike Linnolt (LINMI)
DATE: Nov 17, 2000
TIME: 0730 - 1445 UT (09:30pm - 04:45am HST Nov 16/17)
LOC: Haleakala NP, Maui, HI (20? 40' N, 156? 20m W)
ELEV: 3000 meters
Sky: Mostly Clear, but periods of summit fog.
Conditions: Temp 40F. RH 30-100%. Winds moderately strong.
METHOD: Paper


Observing Periods Summary:
==========================

# Period(UT) FOV      Teff   F    LM   LEO DER ZPU ANT APX SPO
  ---------- ---      ----   -    --     --- --- --- --- --- ---
1 0730-0752  01h +20  0.33  1.00  6.6     0   0   0   1   0   4
2 0804-0836  02h +20  0.50  1.00  6.6     0   2   0   1   0   7
3 0858-0933  03h +20  0.50  1.00  6.1     1   0   0   5   0   2
4 0950-1024  04h +20  0.50  1.00  5.7     2   0   0   3   0   2
5 1040-1113  05h +10  0.50  1.00  5.9     3   1   0   4   0   4
6 1125-1158  05h +00  0.50  1.00  5.9     8   1   0   2   0   2
7 1245-1318  05h +00  0.50  1.00  5.8    10   2   1   1   1   1
8 1330-1402  07h +00  0.50  1.00  5.7     9   0   0   1   2   4
9 1414-1445  08h +00  0.50  1.00  5.5     8   1   0   0   0   3

ANT = Anthelion radiant = NTA/STA
Many Breaks

Periods Detail:
===============

Period #1:
----------

Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6         elev  r  ZHR    mean mag
-----------------------------------------------------------------
LEO: 0  0  0 0  0  0  0  0  0  0 = 0      --  2.0 ---
DER: 0  0  0 0  0  0  0  0  0  0 = 0      42  2.5  0
ZPU: 0  0  0 0  0  0  0  0  0  0 = 0
NTA: 0  0  0 0  0  0  0  0  0  0 = 0      39  2.3\
STA: 0  0  0 0  0  0  0  1  0  0 = 1      39  2.3/ 4.4      +4.0
APX: 0  0  0 0  0  0  0  0  0  0 = 0
SPO: 0  0  0 0  0  0  1  0  2  1 = 4

DEAD TIME: 2 min

Note: Shortened period due to summit fog came in.

Period #2:
----------

Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6         elev  r  ZHR    mean mag
-----------------------------------------------------------------
LEO: 0  0  0 0  0  0  0  0  0  0 = 0      --  2.0 ---
DER: 0  0  0 0  0  0  0  0  2  0 = 2      50  2.5 4.8       +5.0
ZPU: 0  0  0 0  0  0  0  0  0  0 = 0
NTA: 0  0  0 0  0  0  0  0  0  0 = 0      48  2.3\
STA: 0  0  0 0  0  0  0  0  1  0 = 1      48  2.3/ 2.5      +5.0
APX: 0  0  0 0  0  0  0  0  0  0 = 0
SPO: 0  0  1 0  0  0  0  1  2  3 = 7

DEAD TIME: 2 min

Note:

Period #3:
----------

Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6         elev  r  ZHR    mean mag
-----------------------------------------------------------------
LEO: 0  0  0 0  0  1  0  0  0  0 = 1      --  2.0 ---       +2.0
DER: 0  0  0 0  0  0  0  0  0  0 = 0      61  2.5  0
ZPU: 0  0  0 0  0  0  0  0  0  0 = 0
NTA: 0  0  0 0  0  0  1  1  0  0 = 2      61  2.3\
STA: 0  0  0 0  0  0  2  0  1  0 = 3      61  2.3/ 16.0     +3.6
APX: 0  0  0 0  0  0  0  0  0  0 = 0
SPO: 0  0  0 0  0  0  1  1  0  0 = 2

DEAD TIME: 5 min

Note: First LEO seen at 23:29 local time. Radiant elevation was
about -8?! Path was typical grazer, about 90? long. Moon has risen.

Period #4:
----------

Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6         elev  r  ZHR    mean mag
-----------------------------------------------------------------
LEO: 0  0  0 0  0  1  1  0  0  0 = 2      0   2.0 ---       +2.5
DER: 0  0  0 0  0  0  0  0  0  0 = 0      67  2.5  0
ZPU: 0  0  0 0  0  0  0  0  0  0 = 0
NTA: 0  0  0 0  0  0  0  1  0  0 = 1      73  2.3\
STA: 0  0  0 0  0  0  1  1  0  0 = 2      73  2.3/ 12.2     +3.7
APX: 0  0  0 0  0  0  0  0  0  0 = 0
SPO: 0  0  0 0  0  0  0  0  2  0 = 2

DEAD TIME: 4 min

Note: LM dropped a lot due to moon and summit fog or haze.

Period #5:
----------

Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6         elev  r  ZHR    mean mag
-----------------------------------------------------------------
LEO: 0  0  0 0  1  0  0  0  2  0 = 3      10  2.0 52.4      +3.7
DER: 0  0  0 0  0  0  1  0  0  0 = 1      67  2.5 3.8       +3.0
ZPU: 0  0  0 0  0  0  0  0  0  0 = 0
NTA: 0  0  0 0  0  0  0  0  1  0 = 1      84  2.3\
STA: 0  0  0 0  0  1  0  0  2  0 = 3      84  2.3/ 13.3     +4.3
APX: 0  0  0 0  0  0  0  0  0  0 = 0
SPO: 0  0  0 0  0  0  1  2  1  0 = 4

DEAD TIME: 3 min

Note:

Period #6:
----------

Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6         elev  r  ZHR    mean mag
-----------------------------------------------------------------
LEO: 0  0  0 0  0  1  1  4  2  0 = 8      19  2.0 74.5      +3.9
DER: 0  0  0 1  0  0  0  0  0  0 = 1      63  2.5 3.9       +0.0
ZPU: 0  0  0 0  0  0  0  0  0  0 = 0
NTA: 0  0  0 0  0  0  0  0  1  0 = 1      85  2.3\
STA: 0  0  0 0  1  0  0  0  0  0 = 1      85  2.3/ 6.6      +3.0
APX: 0  0  0 0  0  0  0  0  0  0 = 0
SPO: 0  0  0 0  0  0  0  0  2  0 = 2

DEAD TIME: 3 min

Note:

Period #7:
----------

Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6         elev  r  ZHR    mean mag
-----------------------------------------------------------------
LEO: 0  0  0 1  1  1  2  4  1  0 = 10     37  2.0 54.0      +3.0
DER: 0  0  0 0  0  0  0  1  1  0 = 2      48  2.5 10.2      +4.5
ZPU: 0  0  0 0  0  0  0  0  1  0 = 1
NTA: 0  0  0 0  0  0  0  0  0  0 = 0      66  2.3\
STA: 0  0  0 0  0  0  0  0  1  0 = 1      66  2.3/ 3.9      +5.0
APX: 0  0  0 0  0  0  0  0  1  0 = 1
SPO: 0  0  0 0  0  0  0  0  1  0 = 1

DEAD TIME: 3 min

Note:

Period #8:
----------

Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6         elev  r  ZHR    mean mag
-----------------------------------------------------------------
LEO: 1  0  0 0  2  0  1  2  3  0 = 9      47  2.0 42.9      +2.8
DER: 0  0  0 0  0  0  0  0  0  0 = 0      38  2.5 0
ZPU: 0  0  0 0  0  0  0  0  0  0 = 0
NTA: 0  0  0 0  0  0  0  1  0  0 = 1      56  2.3\
STA: 0  0  0 0  0  0  0  0  0  0 = 0      56  2.3/ 4.7      +4.0
APX: 0  0  0 0  0  0  0  0  2  0 = 2
SPO: 0  0  0 0  0  0  0  1  3  0 = 4

DEAD TIME: 2 min

Note:

Period #9:
----------

Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6         elev  r  ZHR    mean mag
-----------------------------------------------------------------
LEO: 0  1  0 0  0  2  0  3  2  0 = 8      57  2.0 38.2      +3.0
DER: 0  0  0 0  0  0  0  0  1  0 = 1      28  2.5 10.7      +5.0
ZPU: 0  0  0 0  0  0  0  0  0  0 = 0
NTA: 0  0  0 0  0  0  0  0  0  0 = 0      46  2.3\
STA: 0  0  0 0  0  0  0  0  0  0 = 0      46  2.3/ 0
APX: 0  0  0 0  0  0  0  0  0  0 = 0
SPO: 0  0  0 0  0  0  1  1  1  0 = 3

DEAD TIME: 1 min

Note: LM reduced by high clouds moving in.

END OF REPORT.