Leonids 2001: Visual Results

The Sino-Dutch Leonid Expedition 2001


by Sietse Dijkstra, Robert Haas, Casper ter Kuile, Koen Miskotte, Jos Nijland, Arnold Tukkers and Michel Vandeputte
Jin Zhu, Xiaojun Jiang, Bin Yang, Huan Meng, Dan Xia, Xuefei Gong, Haitao Chen, Min Guan, Wenzhong Liu, Jian Gao, Rui Qi, Yongming Chen

1. Summary Report of Visual Observations
2. Visual report of Koen Miskotte (MISKO)
3. Visual report of Arnold Tukkers (TUKAR)
4. Visual report of Michel VandePutte (PUTMI)
5. Visual report of Jos Nijland (NIJJO)
6. Visual report of Sietse Dijkstra (DIJSI)
7. List of bright meteors by Michel VandePutte (PUTMI)
8. ZHR plot from visual observations by MISKO
9. Comparing Lyytinen model predictions and Observations

Last updated: 10 january 2002




Leonids 2001: Summary report

Michel Vandeputte (PUTMI), Koen Miskotte (MISKO), Arnold Tukkers (TUKAR), Jos Nijland (NIJJO), Dan Xia (XIADA), Jin Zhu (ZHUJI)
from Xinglong, PanShan and Miyun stations, NAOC, Hebei/Beijing, China

Interval [UT]PUTMIMISKOTUKARNIJJOXIADAZHUJI
14:00 - 15:00021000
15:00 - 16:0031375401821
16:00 - 17:002102152070990
17:00 - 18:007269247564684930
18:00 - 19:001519133513881126777635
19:00 - 20:009317354354923100
20:00 - 21:004935044070550
21:00 - 22:0026432722612500
Total41744079347422111752656




Visual report by Koen Miskotte (MISKO)

1 minute count of Leonids by  Koen Miskotte (MISKO)

The plot of Koen Miskotte is computed using:





Visual report by Arnold Tukkers (TUKAR)

1 minute count of Leonids by  Arnold Tukkers (TUKAR)

The plot of Arnold Tukkers is computed using:





Visual report by Michel VandePutte (PUTMI)

1 minute count of Leonids by Michel VandePutte (PUTMI)




Visual report by Jos Nijland (NIJJO)

1 minute count of Leonids by Jos Nijland (NIJJO)




List of bright meteors observed by Michel Vandeputte (PUTMI)

Observed by : Vandeputte Michel  (IMO - VANMC)

Attention : This list is based on my visual observations.

17 - 18/11/01

Post Pan Shan

Observing window : 15.30 - 21.45 UT

All times in UT.

16.35		Tau -4		Canis Minor - blue white - long trail - Mag -4 flare.
17.31 		Spo -6 		Average speed in Draco - short trail.
18.55		Leo -2		Long trail - Ursa Major to Ursa Minor - ~ : 2 s
19.00 		Leo -4		Fireball - short train from Orion to Lepus - ~ : 4s.
20.00 		Leo -3		Short trail - Ursa Major - ~


18-19/11/01

Post Pan Shan

Observing window : 15.25 - 21.55 UT

16.00 - 16.10	Leo -2		earth grazer with -2 flare - ~ .
16.03.58     	Leo -6		earth grazer with 30 minutes persistent train of 20 degrees in
				Canis Major. For the visitors of the website of Robert haas ;
				This is the famous "go go go" earth grazer.
				See : http://delpsurf.www.cistron.nl/leo2001/photo6.htm
16.20 - 16.25	Leo -2		~
16.25 		Leo -2
16.25 - 16.30	Leo -3		together with two magnitude +3 Leonids.
16.54.00    	Leo -3
16.55		Leo -2		Ursa Major
16.57		Leo -4		Ursa Major
16.58 		Leo -3
17.05		Leo -5		eastern horizon.
17.16		Leo -4		strong  magnitude -4 flare at the end, exactly in M44 (Cancer)
				persistent train.
17.16		Leo -4		short trail in Leo
17.18		Leo -8		Ursa Major / ~
17.22		Leo -4		Leo
17.27 		Leo -3
17.29.24  	Leo -8		Ursa Minor - 10 minutes (visual) persistent train.
17.39		Fireball     	Magnitude unknown
17.42.45  	Leo -4		Hydra
17.46.10  	Leo -4		Perseus - long transforming persistent train.
17.46.13   	Leo -4
17.47.46  	Leo -6		Ursa Major - beautiful transforming persistent train ( U-shape)
17.49.33   	Leo -2
17.51.18  	Leo -5		Ursa Minor - wide transforming persistent train.
17.52.09  	Fireball     	Flash behind the mountains.
17.53.22  	Leo -2		Orion - strong flare at the end - wide ~
18.01.39   	Leo -2
18.03.24   	Leo -3		Ursa Minor.
18.04.38     	Leo -4
18.10.36   	Leo -5		Sextant.
18.14.20    	Fireball     	Leonid activity has become to high now, to take time for  brightness estimation.
18.14.25      	Fireball
18.16.17      	Fireball
18.16.45      	Fireball
18.21.58    	Fireball
18.23.09     	Fireball     	Monceros.
18.24.10     	Fireball      	From Gemini to Orion.
18.39.59      	Fireball
18.41.06     	Fireball     	Hydra.
18.42.40     	Fireball      	From Ursa Minor to Draco.
18.46.05      	Fireball
18.46.27      	Fireball
18.51.54      	Fireball
18.52.40     	Fireball      	Ursa Major.
18.52.53     	Fireball      	Ursa Major.
19.03.15     	Fireball      	-3 ?
19.05.19      	Fireball      	Canis Major.
19.05.55      	Leo -10	      	Sextant.
19.17.08      	Fireball      	Ursa Major.
19.21.57      	Fireball
19.23.38      	Leo -5	      	Sextant.
19.25.55      	Fireball
19.25.59      	Fireball
19.12.44      	Leo -12 possible -15 ? In Leo - She really blinded me ! Even its train
	     			has a negative magnitude for a couple of seconds. After three
	      			minutes, the brightness was already decreased to Magnitude +5.
19.30.14      	Fireball
19.31.13      	Fireball
19.35.24     	Fireball      	-3 ?
19.35.25     	Fireball      	-3 ?
19.37 	     	Fireball      	-3 ?
19.37.53      	Fireball      	-3 ?
19.44.48      	Fireball       	Bootes - eastward (behind the mountains).
19.50.28      	Leo -8	      	possible -10 ? - Bootes.
19.55.01      	Fireball      	Virgo.
19.55.43      	Leo -3	      	Leo.
19.58.40      	Leo -4	      	From Lepus to Eridanus.
19.59.23      	Leo -3
20.03.27       	Leo -2
20.05	     	Leo -5	      	Bootes.
20.07.38       	Leo -2
20.09.45       	Leo -3
20.09.45      	Leo -6	       	Virgo.
20.10.53      	Leo -2
20.17.19      	Leo -2       	Sextant / Crater.
20.17.28      	Leo -2		Between Gemini and Orion - strong flare at the end.
20.31.06      	Leo -2		Sextant - ~ .
20.31.08      	Leo -7		From Ursa Minor to Ursa Major. - Wide persistent train. "S"
	      			shape in the beginning, and after a couple of minutes trans-
	      			forming into a "U".
20.31.22      	Leo -6		Leo.
20.35.44      	Leo -4		Between Canis Minor and Orion - transforming ~.
20.40.34       	Leo -2
20.41.50      	Leo -2
20.47.38      	Leo -4		Close tot the radiant - short trail - green - little transforming
	      			persistent train.
20.51.47       	Leo -5		Draco - ~ .
20.52.58      	Leo -3		Virgo - ~ .
20.55.06       	Leo -2
21.01.42      	Leo -2		Bootes - ~ .
21.03.01      	Leo -4		Close to the radiant in Leo - ~ .
21.11.05      	Leo -2		From Leo to Corvus.
21.13.33      	Leo -7		Ursa Minor - ~.
21.17.56      	Leo -12 ?      	Cassiopeia. I only saw a part. - ~ .
21.22.36      	Leo -4		northeast.
21.32	      	Leo -3		Bootes.
21.36	      	Leo -4		Orion - ~ - strong flare at the end.
21.44	       	Leo -3		Serpens Caput - Virgo.
After 22 UT  	Fireball       	in full morning twilight !


19 - 20/11/01

Post Pan Shan

Observing window : 15.45 - 21.30 UT

16.54	     	Leo -2




ZHR plot by Marco Langbroek from observations of MISKO

ZHR plot by Marco Langbroek from observation by MISKO




Comparing the Lyytinen model predictions and observations of MISKO
Did we observed the 4-rev. trail or did we only observed the 9, 10 & 11 trails instead?
Question: did we missed the 4-rev. trail at all or is the density of material in this trial much less as predicted by Lyytinen?

Plot made by Marco Langbroek

ZHR plot by Marco Langbroek from observation by MISKO 4 revolutions trail

lyttinen 7 revolutions trail7 revolutions trail

For more information please consult Marco's website at:

http://home.wanadoo.nl/marco.langbroek/leo2001.html




Acknowledgements and Sponsoring of the Sino-Dutch Leonid Expedition 2001


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