OBSERVATIONS

Several observational methods were used. Fourteen observers covered meteor activity with visual observations. Photographic, including all-sky, and video observations were also employed. A radio forward scatter receiver was installed at a distant location but the observations will not be covered in this paper.
Fourteen observers covered six clear nights with the observations around the maximum of the Perseids. In 208 hours of observations 7556 meteors were recorded with 4692 of them being Perseids (see Table below). Other showers were also seen: 120 Alpha Capricornids, 181 Kappa Cygnids, and 455 diverse Aquarids.

Table 1: Visual observer's statistics for the 2005 Perseids.

Observer	IMO code	Teff [h]	Total	Spor	PER	Other
Mitja Govedic	GOVMI	31.53	995	252	630	113
Javor Kac	KACJA	25.53	836	207	543	86
Jaka Dobaj	DOBJA	22.23	960	257	615	88
Petra Brence	BREPE	21.75	476	170	257	49
Martin Cokl	COKMA	19.74	610	224	316	70
Tadej Medved	MEDTA	19.28	764	183	502	79
Manca Behric	BEHMA	19.02	529	197	277	55
Matej Savli	SAVMT	15.11	378	131	155	92
Jure Atanackov	ATAJU	11.31	970	216	682	72
Gregor Kladnik	KLAGR	6.95	265	65	173	28
Marusa Kuk	KUKMA	4.69	144	67	77
Samo Smrke	SMRSA	4.35	264	39	217	8
Aleksandra Brglez	BRGAL	3.45	102	50	52
Janez Kos	KOSJN	3.06	263	51	196	16
	totals	208.00	7556	2108	4692	756

ANALYSIS

Population index of the Perseids
The population index r was calculated for six nights of the camp (Figure 1 left). Population index is almost constant at r = 2.1 ± 0.1 for most of the period. A large error bar on the night of August 7/8 is due to a low number of Perseids seen. The lowest value of r = 1.87 ± 0.08 was reached at about 21^h20^m UT on 2005 August 12 but the population index is almost constant at r = 2.0 ± 0.1 for the whole night.

Figure 1: Population index profile of the Perseids during MART 2005 (left) and a detailed profile for the night 2005 August 12/13 (right).

Activity profile of the 2005 Perseids
Activity profile was calculated using population indices from Figure 1. For the nights prior to MART 2005 we used r = 2.6 for the calculations. Our observing run starts on 2005 July 28/29 with the Perseid ZHR = 7 ± 3. The last observing night before the MART 2005 was 2005 August 1/2 with the Perseid ZHR = 10 ± 2. The Perseid rates at the start of the Camp were 12 ± 1 Perseids per hour. The rates then climbed steadily to 22 detailed Perseid activity profile for the night 2005 August 12/13 is shown in Figure 2. The highest activity observed was at about 70-80 meteors per hour ZHR with some fluctuations during the night.

Figure 2: Activity profile of the Perseids during MART 2005 (left) and a detailed profile for the night 2005 August 12/13 (right).

Photographic observation results
During the Camp 89 meteor trails were secured on film or digital cameras. Unfortunately only 21 of the meteors had their exact time registered. Other meteors have errors in Right Ascension of the order of about 2 minutes. Tracings plot was made with Radiant 1.43. The position with most intersections is located at a = 48° and d = 58°, close to the position listed in ephemerides (McBeath 2004).
The highlight of the Camp was a -7^th magnitude fireball that was recorded on August 11, 2005 at 01^h57^m50^s UT and was captured with a digital camera and also on our all-sky camera.

Figure 4: A -7^th magnitude meteor in Taurus/Perseus was caught with Canon 300D digital camera on August 11, 2005 at 01^h57^m50^s UT. Photo by: Simon Krulec and Peter Atanackov.

Video results
Meteor activity was recorded during six clear nights. More than 400 meteors were recorded with most of them being the Perseids (Table 2). Table 2: Video observation summary for the camera METKA.

Teff	nights	meteors	Spor	PER	KCG	SIA	SDA	CAP	NDA	NIA
44h15m	6	411	89	281	10	10	8	5	5	3

Video adiant positions
Radiant position for the maximum night (at d = 140.3°) was calculated using 155 meteors and is located at a = 46.7° and d = 59.3°, almost exactly the position listed in the ephemerides (McBeath 2004). The radiant coordinates in other nights are listed in Table 3.

Table 3: Video radiant coordinates. The last column gives the number of meteors used in the calculation.

l	a	d	used/all
133.5	36.2	57.6	34/41
135.4	38.1	56.9	27/33
136.4	39.2	57.9	55/61
137.4	39.3	58.9	59/68
140.3	46.7	59.3	155/173

Conclusion
The tenth summer Youth astronomical research camp was a great success again. Six nights from nine possible were clear enough to allow meteor observations. The highest Perseid rates were observed on 2005 August 12/13 with the maximum ZHR = 89 ± 6. Several novice observers were introduced to meteor astronomy at the Camp.

Acknowledgements
We want to thank Orion Astronomical Society and Ustvarjalno astronomsko drustvo for organizing the Camp. The Camp was supported by the grant from Ministry of Higher Education, Science and Technology of the Republic of Slovenia. We also want to thank the observers for obtaining and handling their data.

References