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InternationalInternational MeteorMeteor ConferenceConference 20102010

PerseidsPerseids && GeminidsGeminids 20092009

RafaelRafael G.G. BarriosBarrios B.B. AsociaciAsociaci óónn LarenseLarense dede AstronomAstronomíía,a, ALDAALDA InternationalInternational MeteorMeteor ConferenceConference 20102010 Briefing Perseids are rests from 109P/ Swift -Tuttle , discovered in July 1962. El body has a diameter about 9,7 Kms and transit throught its orbits on a 35 years period. Its last incursion into Inner Solar System occurs on 1992, in 1993 reached a Zenital Hour Rate (ZHR) up to 300 Meteos / Hr. Comet is responsible for the Perseids Phenomenon, we are able to assist durong , ´s position is located in . Many Meteors observers, year by year, waiting to assist this eve nt, this has been one of the most spectacular ones during l ast years, with high meteor rates, reaching up to 300 ZHR. On 2009, on latitudes near from Barquisimeto City, major peak was expected t o be around 05:30 hrs. Members of Asociaci ón Larense de Astronomía (ALDA) were placed in 3 diferents sites: Barbacoas, Saroche and Duaca. InternationalInternational MeteorMeteor ConferenceConference 20102010

109P / Swift -Tuttle InternationalInternational MeteorMeteor ConferenceConference 20102010

PerseidsPerseids InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009

Perseids observation period for 2009, began on July 17th and fin ished on August 24th. The maximum activity was expected on August 12th at 05:30 hrs. (UT) The expected Zenital Hour Rate: 100 Meteor / Hr Dec: 58 ° ; AR: 48 ° Total Observing time: 7,35 hr Registered Perseids: 131 InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009 – Sky Recognition

Ruchbah ( δ Cas) Caph ( β Cas) (2m,65) γ Cas (2m,15) (2m,25)

Shedir ( α Cas) (2m,20) Casiopea Mirphak ( α Per) ( β Per) (1m,75) (1m,75)

Mirach ( β And) ε Per (2m,05) (2m,90) Perseus Andrómeda M32 (3m,50)

Almaak ( γ1 And) (2m,15) InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009 – Visual Stellar Magnitude Limit

To determine the Visual Stellar Magnitude Limit, usually use tri angles as references. On the lower image it is easy to recognize which sta r has the highest visual magnitude, the one that a single person can identify usin g his naked eye. It may vary according to sky and weather conditions, visual defect, etc.

Mirphak ( α Per) (1m,75)

σ Per (4m,35) ι Per (4m,95) 3636 Per Per (5m,30) (5m,30)

ν Per (3m,75)

Algol ( β Per) ε Per (1m,75) (2m,90) InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009 - Observations

Observers around the World: InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009 - Observations

Venezuela ´s observers: InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009 - Observations

Temporal Observers Distribution Chart: InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009 - Observations

Hour by hour shower behaviour: InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009 - Observations InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009 - Observations

Zenital HourBehaviour Rate (ZHR) on - Venezuela Perseids 2009 (Venezuela) InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids 2009 - Others

DuringDuring observational observational work work there there were were detected detected meteo meteorsrs with with differentdifferent kindkind ofof trazes,trazes, differentdifferent colourscolours also.also. BBasedased onon thethe cc olorolor ofof thosethose trazestrazes itit cancan sensesense meteormeteor andand cometcomet compositcomposition:ion: Green:Green: 19%,19%, presencepresence ofof NickelNickel (Ni),(Ni), ThalliumThallium (Tl),(Tl), BariumBarium (Ba)(Ba) Yellow:Yellow: 17%,17%, presencepresence ofof SodiumSodium (Na)(Na) Blue:Blue: 2%2% ,, MagnesiumMagnesium (Mg),(Mg), SeleniumSelenium (Se),(Se), PlumbPlumb (Pb)(Pb) White:White: 53%,53%, IronIron (Fe),(Fe), CopperCopper (Cu),(Cu), ArsenioArsenio (As),(As), AntimonyAntimony (Sb),(Sb), CesiumCesium (Cs)(Cs) Red:Red: 4%,4%, StrontiumStrontium (Sr),(Sr), LithiumLithium (Li)(Li) InternationalInternational MeteorMeteor ConferenceConference 20102010

GeminidsGeminids InternationalInternational MeteorMeteor ConferenceConference 20102010 Briefing

(3200) Phaeton is an asteroid, responsible for this meteor showe r, update, scientists consider that this is an extinct comet, which particles were scattered many centuries ago. Year by year, Earth come acro ss this wake showing us a magnificent spectacle.

Many Meteors observers, year by year, waiting to assist this eve nt, this meteor shower, on latitudes near from Barquisimeto City, major p eak was expected to be around 05:00 hrs UT. Members of Asociaci ón Larense de Astronomía (ALDA) were placed in 2 diferents sites: Barbacoas and Saroche. InternationalInternational MeteorMeteor ConferenceConference 20102010 2009

Geminids observation period for 2009, began on December 7th and finished on December 17th. The maximum activity was expected on December 14th at 05:00 hrs. (UT) Expected Zenital Hour Rate: 120 Meteor / Hr Dec: 33 ° ; AR: 112 ° Total Observing time: 9,00 hr Registered Geminids: 389 Not Reported Geminids: 241 InternationalInternational MeteorMeteor ConferenceConference 20102010 Geminids 2009 – Sky Recognition Bellatrix ( γ Ori) (1m,60)

Géminis Orión Mintaka ( δ Ori) (2m,40)

Castor ( α Gem) Alnilam ( ε Ori) (1m,90) (1m,65) Alnitak ( ζ Ori) (1m,85)

Pollux ( β Gem) (1m,15) Almaak ( α Ori) (0m,45) Procyon ( α CMi) (0m,40) Canis Minor InternationalInternational MeteorMeteor ConferenceConference 20102010 Geminids 2009 – Visual Stellar Magnitude Limit

To determine the Visual Stellar Magnitude Limit, using same proc edure as used for Perseids, it follows:

In the Triangle formed by: Castor – Pollux – Alhena:

HIP 36896 A (6m,05) InternationalInternational MeteorMeteor ConferenceConference 20102010 Geminids 2009 - Observations

Observers around the World: InternationalInternational MeteorMeteor ConferenceConference 20102010 Geminids 2009 - Observations

Temporal Observers Distribution Chart: InternationalInternational MeteorMeteor ConferenceConference 20102010 Geminids 2009 - Observations

Hour by hour shower behaviour: InternationalInternational MeteorMeteor ConferenceConference 20102010 Geminids 2009 - Others

DuringDuring observational observational work work there there were were detected detected meteo meteorsrs with with differentdifferent kindkind ofof trazes,trazes, differentdifferent colourscolours also.also. BBasedased onon thethe cc olorolor ofof thosethose trazestrazes itit cancan sensesense meteormeteor andand cometcomet compositcomposition:ion: White:White: 71%,71%, IronIron (Fe),(Fe), CopperCopper (Cu),(Cu), ArsenioArsenio (As),(As), AntimonyAntimony (Sb),(Sb), CesiumCesium (Cs)(Cs) Green:Green: 17%,17%, presencepresence ofof NickelNickel (Ni),(Ni), ThalliumThallium (Tl),(Tl), BariumBarium (Ba)(Ba) Yellow:Yellow: 1%,1%, presencepresence ofof SodiumSodium (Na)(Na) Blue:Blue: 1%1% ,, MagnesiumMagnesium (Mg),(Mg), SeleniumSelenium (Se),(Se), PlumbPlumb (Pb)(Pb) InternationalInternational MeteorMeteor ConferenceConference 20102010 Perseids & Geminids 2009 - Observations ALDA Members location by the time of the showers:

Barbacoas: Saroche: Duaca: Carlos Torres Jes ús Guerrero Jhonny Torres Gilbert S ánchez Rafael Garcia Héctor Su árez Mar ía F. Garcia Francisco Su árez Jos é V. Histol Francis Falc ón Ricardo Bernardinez Jos é Escalona Isa ías P érez Imelda Colmenarez Eddy Valera Tito Lizardo Rafael Barrios B. InternationalInternational MeteorMeteor ConferenceConference 20102010 InternationalInternational MeteorMeteor ConferenceConference 20102010

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