Difference: VisibilitatTransit050612en (1 vs. 9)

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Information about transits

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 A transit is the crossing of a planet or any celestial object in front of the Sun. Mercury and Venus are the only Solar System planets that can give transits, because they are closer to the Sun than the Earth. The Moon can also give transits, and in this case the phenomena is called a Solar eclipse.

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During a transit the disk of the planet is seen projected on the bright surface of the Sun..
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During a transit the disk of the planet is seen projected on the bright surface of the Sun.
 
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imatgeBCNccd 69.jpg
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imatgeBCNccd 69.jpg
  Image taken from the 2004 transit in Barcelona

with a CCD camera

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31 4840.JPG
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31 4840.JPG
  Projection of the 2004 transit
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 Table below shows the contact times for some Spanish cities. The Sun will be bellow the horizon almost for all of them. Even in the eastern part of Catalonia and in the last moments of the transit the Sun will be too low to be able to enjoy.

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 Taula Contactescataen.jpg
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 Visibility map of the Transit

Depending on the Time Zone of the observers they will be able to see the transit on 5 afternoon or on 6 morning. The event is invisible in all places where the Sun is not over the horizon during the time of the transit.

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scunirec h22.jpg logo MINECO FECYT Web.jpg

Revision 822 Jun 2012 - SurinyeOlarte

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 Visibility map of the Transit

Depending on the Time Zone of the observers they will be able to see the transit on 5 afternoon or on 6 morning. The event is invisible in all places where the Sun is not over the horizon during the time of the transit.

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ide bas-mes gran.jpg logo iccub.jpg ieec70.gif LOGOPAMCOU.jpg logo MINECO FECYT Web.jpg

Revision 715 Dec 2011 - SurinyeOlarte

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In this Contacts table you can see the four contacts of Venus for more than a hundred international cities.

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In this link you can find contact times for every city of the world.

Revision 609 Dec 2011 - SurinyeOlarte

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In this Contacts table you can see the four contacts of Venus for more than a hundred international cities.

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In this link you can find contact times for every city of the world.

Revision 501 Dec 2011 - SurinyeOlarte

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 Visibility map of the Transit

Depending on the Time Zone of the observers they will be able to see the transit on 5 afternoon or on 6 morning. The event is invisible in all places where the Sun is not over the horizon during the time of the transit.

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ide bas-mes gran.jpg ieec70.gif LOGOPAMCOU.jpg logo-fecyt-jpg.jpg
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ide bas-mes gran.jpg logo iccub.jpg ieec70.gif LOGOPAMCOU.jpg logo-fecyt-jpg.jpg
 

Revision 422 Nov 2011 - SurinyeOlarte

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Transit visibility

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Information about transits

 
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logovenus12en.jpg
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logovenus12en.jpg
 
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Observation times

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What is a transit?

A transit is the crossing of a planet or any celestial object in front of the Sun. Mercury and Venus are the only Solar System planets that can give transits, because they are closer to the Sun than the Earth. The Moon can also give transits, and in this case the phenomena is called a Solar eclipse.

During a transit the disk of the planet is seen projected on the bright surface of the Sun..

imatgeBCNccd 69.jpg

Image taken from the 2004 transit in Barcelona

with a CCD camera

31 4840.JPG

Projection of the 2004 transit

Transit Visibility

Observation times

  During a transit we can distinguish some remarkable moments:
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Global Visibility

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Global Visibility

  The transit is not visible everywhere on Earth. Depending on the altitude of the Sun in a place during the event, the transit will be enterily, partially or not at all visible.

Revision 326 Oct 2011 - LolaBalaguer

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Transit Visibility

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Transit visibility

 

logovenus12en.jpg

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Observation times

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Observing a transit we can distinguish some remarkable moments:
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During a transit we can distinguish some remarkable moments:
 
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  • Contact I, or external ingress, is the instant when the planet's disk is externally tangent with the Sun.
  • El Contact II, or internal ingress, is the instant when the planet's disk is internally tangent with the Sun. Then the entire disk of the Venus is first seen.
  • During the next several hours, Venus gradually traverses the solar disk at a relative angular rate of approximately 4 arc-min/hr.
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  • Contact I, or external ingress: the instant when the planet's disk is externally tangent with the Sun.
  • Contact II, or internal ingress: the instant when the planet's disk is internally tangent with the Sun. The entire disk of the Venus is first seen.
  • During the next several hours, Venus gradually traverses the solar disk at a relative angular rate of approximately 4 arcmin/hr.
 
  • Greatest transit is the instant of minimum angular separation between Venus and the Sun as seen from Earth's geocenter.
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  • Contact III, or internal egress, is the instant when the planet reaches the opposite limb and is once again internally tangent with the Sun.
  • El Contacte IV, or external egress, sortida externa, is the instant when the planet's limb is as a contact I externally tangent to the Sun but at the opposite side of the Sun. The transit ends at this contact.
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  • Contact III, or internal egress: the instant when the planet reaches the opposite limb and is once again internally tangent with the Sun.
  • Contact IV, or external egress:the instant when the planet's limb is, similarly to contact I, externally tangent to the Sun but at the opposite side of the Sun. The transit ends at this contact.
 The next figure illustrates the geocentric observing geometry of each transit across the Sun (celestial north is up).

Sun20042012-2.GIF
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Global Visibility

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The transit can not be seeing from all the Earth's places. Depending on the altitude of the Sun in every place during the event the transit will be enterily visible in some areas, in other areas visible in part and invisible in the rest.
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The transit is not visible everywhere on Earth. Depending on the altitude of the Sun in a place during the event, the transit will be enterily, partially or not at all visible.
 
  • The four contacts will be visible from northwestern North America, Hawaii, the western Pacific, northern Asia, Japan, Korea, eastern China, Philippines, eastern Australia, and New Zealand.
  • The Sun sets while the transit is still in progress from most of North America, the Caribbean, and northwest South America.
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  • No portion of the transit will be visible from Portugal or southern Spain, western Africa, and the southeastern 2/3 of South America.

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In the Contacts table shown in the attachment there are the four contacts of Venus with the Solar Perimeter for more than a hundred international cities.
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In this Contacts table you can see the four contacts of Venus for more than a hundred international cities.
 
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Next table shows the contact times for some cities of Spain. In this table can be seen how the Sun will be bellow the horizon almost for all the transit time. Even in the eastern part of Catalonia and in the last moments of the transit the Sun will be too low to be able to enjoy.
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Table below shows the contact times for some Spanish cities. The Sun will be bellow the horizon almost for all of them. Even in the eastern part of Catalonia and in the last moments of the transit the Sun will be too low to be able to enjoy.
 

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 Visibility map of the Transit

Depending on the Time Zone of the observers they will be able to see the transit on 5 afternoon or on 6 morning. The event is invisible in all places where the Sun is not over the horizon during the time of the transit.

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ide bas-mes gran.jpg ieec70.gif LOGOPAMCOU.jpg logo-fecyt-jpg.jpg
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ide bas-mes gran.jpg ieec70.gif LOGOPAMCOU.jpg logo-fecyt-jpg.jpg
 

Revision 226 Oct 2011 - SurinyeOlarte

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Visibilitat del trÓnsit

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Transit Visibility

 
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LogoTransit12.jpg
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logovenus12en.jpg
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Instants d'observaciˇ

Durant l'observaciˇ d'un transit cal distingir alguns moments remarcables:

  • El Contacte I, o entrada externa, Ús l'instant en el que el disc del planeta Ús exteriorment tangent amb el Sol.
  • El Contacte II, o entrada interna, Ús quan el planeta Ús interiorment tangent amb el Sol. Aleshores es pot veure per primer cop tot el disc del planeta.
  • Durant les hores segŘents Venus travessa el disc solar a una velocitat aproximada de 4 minuts d'arc per hora.
  • La Culminaciˇ del trÓnsit Ús l'instant de mÝnima separaciˇ angular entre Venus i el Sol per un observador geocŔntric.
  • El Contace III, o sortida interna, Ús l'instant en el que el disc del planeta Ús interiorment tangent al Sol per˛ pel costat oposat al Contacte I.
  • El Contacte IV, o sortida externa, Ús l'instant en el que el disc del planeta Ús exteriorment tangent al Sol per˛ pel costat oposat al Contacte II. El planeta ja no es veu, i el trÓnsit s'ha acabat.
En la segŘent figura es pot veure la traject˛ria dels trÓnsits (2004-2012) per a un observador geocŔntric.
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Observation times

 
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Observing a transit we can distinguish some remarkable moments:

  • Contact I, or external ingress, is the instant when the planet's disk is externally tangent with the Sun.
  • El Contact II, or internal ingress, is the instant when the planet's disk is internally tangent with the Sun. Then the entire disk of the Venus is first seen.
  • During the next several hours, Venus gradually traverses the solar disk at a relative angular rate of approximately 4 arc-min/hr.
  • Greatest transit is the instant of minimum angular separation between Venus and the Sun as seen from Earth's geocenter.
  • Contact III, or internal egress, is the instant when the planet reaches the opposite limb and is once again internally tangent with the Sun.
  • El Contacte IV, or external egress, sortida externa, is the instant when the planet's limb is as a contact I externally tangent to the Sun but at the opposite side of the Sun. The transit ends at this contact.
The next figure illustrates the geocentric observing geometry of each transit across the Sun (celestial north is up).
 

Sun20042012-2.GIF
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Traject˛ria de Venus davant el Sol durant la parella de trÓnsits d'aquest segle.
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Trajectory of Venus across the Sun during the transits of this century.
 
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En la part inferior es veu el recorregut que va fer Venus al juny del 2004 i en la superior lapredicciˇ pel juny de l'any que ve.
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The 2004 transit crossed the Sun's southern hemisphere while the prediction for 2012 event is that Venus will cross the northern hemisphere.
 

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Visibilitat global

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Global Visibility

The transit can not be seeing from all the Earth's places. Depending on the altitude of the Sun in every place during the event the transit will be enterily visible in some areas, in other areas visible in part and invisible in the rest.

 
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El trÓnsit no es podrÓ veure de tots els llocs de la terra. Depenent de l'alšada sobre l'horitzˇ del Sol en cada lloc durant el trÓnsit en unes zones del mˇn es podrÓ veure tot sencer, en d'altres una part i en d'altres no serÓ visible.
  • Els 4 contactes es veuran des del nordoest de Nord-AmŔrica, Hawaii, el PacÝfic oest, el nord d'Asia, Japˇ, Korea, l'est de la Xina, Filipines, l'est d'Australia i Nova Zelanda.
  • El Sol es pondrÓ mentre el trÓnsit encara no s'hagi acabat a la major part de Nord AmŔrica, el Carib i el nordoest de Sud-AmŔrica.
  • El Sol sortirÓ amb Venus ja al seu davant a l'└sia Central, l'Orient MitjÓ, Europa, i l'est d'└frica.
  • A Portugal, al sud d'Espanya, a l'oest d'└frica, i al sudest de Sud-AmŔrica no veuran el trÓnsit.
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  • The four contacts will be visible from northwestern North America, Hawaii, the western Pacific, northern Asia, Japan, Korea, eastern China, Philippines, eastern Australia, and New Zealand.
  • The Sun sets while the transit is still in progress from most of North America, the Caribbean, and northwest South America.
  • The transit is already in progress at sunrise for observers in central Asia, the Middle East, Europe, and eastern Africa.
  • No portion of the transit will be visible from Portugal or southern Spain, western Africa, and the southeastern 2/3 of South America.
 

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En la Taula de contactes que mostrem en un document pdf adjunt podreu trobar els temps dels 4 contactes de Venus amb el perÝmetre solar en mÚs de cent ciutats de tot el mˇn.
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In the Contacts table shown in the attachment there are the four contacts of Venus with the Solar Perimeter for more than a hundred international cities.
 
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En la taula que hi ha a continuaciˇ presentem els temps de contacte en algunes ciutats de l'estat. En aquesta taula es pot veure com el Sol durant la gran part del trÓnsit es trobarÓ per sota de l'horitzˇ, i com, fins hi tot en la part mÚs oriental de Catalunya i en els ˙ltims moments del trÓnsit, estarÓ massa baix per a poder-ne gaudir.
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Next table shows the contact times for some cities of Spain. In this table can be seen how the Sun will be bellow the horizon almost for all the transit time. Even in the eastern part of Catalonia and in the last moments of the transit the Sun will be too low to be able to enjoy.
 

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Error: (1) can't find Taula_Contactescata3.jpg at /ServiAstro.VisibilitatTransit050612
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Error: (1) can't find Taula_Contacteseng3.jpg at /ServiAstro.VisibilitatTransit050612
 

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En aquest enllaš es pot calcular els temps de contacte de Venus amb el perÝmetre del Sol per a qualsevol ciutat del mˇn
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In this link you can find contact times for every city of the world.
 

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En aquest mapa es representa la visibilitat del trÓnsit al mˇn.
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This map represents the visibility of the transit over the world.
 

Visibilitat en colorca.jpg
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Mapa de visibilitat del trÓnsit
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Visibility map of the Transit
 
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En funciˇ de la zona horaria on els observadors estiguin situats podran veure el trÓnsit durant la tarda del dia 5 o el matÝ del dia 6, essent impossible de veure en tots aquells llocs on el sol no hagi sortit ho ja s'hagi post en el moment del trÓnsit.
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Depending on the Time Zone of the observers they will be able to see the transit on 5 afternoon or on 6 morning. The event is invisible in all places where the Sun is not over the horizon during the time of the transit.
 

ide bas-mes gran.jpg ieec70.gif LOGOPAMCOU.jpg logo-fecyt-jpg.jpg

Revision 126 Oct 2011 - SurinyeOlarte

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Visibilitat del trÓnsit

LogoTransit12.jpg

Tornar

Instants d'observaciˇ

Durant l'observaciˇ d'un transit cal distingir alguns moments remarcables:

  • El Contacte I, o entrada externa, Ús l'instant en el que el disc del planeta Ús exteriorment tangent amb el Sol.
  • El Contacte II, o entrada interna, Ús quan el planeta Ús interiorment tangent amb el Sol. Aleshores es pot veure per primer cop tot el disc del planeta.
  • Durant les hores segŘents Venus travessa el disc solar a una velocitat aproximada de 4 minuts d'arc per hora.
  • La Culminaciˇ del trÓnsit Ús l'instant de mÝnima separaciˇ angular entre Venus i el Sol per un observador geocŔntric.
  • El Contace III, o sortida interna, Ús l'instant en el que el disc del planeta Ús interiorment tangent al Sol per˛ pel costat oposat al Contacte I.
  • El Contacte IV, o sortida externa, Ús l'instant en el que el disc del planeta Ús exteriorment tangent al Sol per˛ pel costat oposat al Contacte II. El planeta ja no es veu, i el trÓnsit s'ha acabat.
En la segŘent figura es pot veure la traject˛ria dels trÓnsits (2004-2012) per a un observador geocŔntric.

Sun20042012-2.GIF

Traject˛ria de Venus davant el Sol durant la parella de trÓnsits d'aquest segle.

En la part inferior es veu el recorregut que va fer Venus al juny del 2004 i en la superior lapredicciˇ pel juny de l'any que ve.

Visibilitat global

El trÓnsit no es podrÓ veure de tots els llocs de la terra. Depenent de l'alšada sobre l'horitzˇ del Sol en cada lloc durant el trÓnsit en unes zones del mˇn es podrÓ veure tot sencer, en d'altres una part i en d'altres no serÓ visible.

  • Els 4 contactes es veuran des del nordoest de Nord-AmŔrica, Hawaii, el PacÝfic oest, el nord d'Asia, Japˇ, Korea, l'est de la Xina, Filipines, l'est d'Australia i Nova Zelanda.
  • El Sol es pondrÓ mentre el trÓnsit encara no s'hagi acabat a la major part de Nord AmŔrica, el Carib i el nordoest de Sud-AmŔrica.
  • El Sol sortirÓ amb Venus ja al seu davant a l'└sia Central, l'Orient MitjÓ, Europa, i l'est d'└frica.
  • A Portugal, al sud d'Espanya, a l'oest d'└frica, i al sudest de Sud-AmŔrica no veuran el trÓnsit.

En la Taula de contactes que mostrem en un document pdf adjunt podreu trobar els temps dels 4 contactes de Venus amb el perÝmetre solar en mÚs de cent ciutats de tot el mˇn.

En la taula que hi ha a continuaciˇ presentem els temps de contacte en algunes ciutats de l'estat. En aquesta taula es pot veure com el Sol durant la gran part del trÓnsit es trobarÓ per sota de l'horitzˇ, i com, fins hi tot en la part mÚs oriental de Catalunya i en els ˙ltims moments del trÓnsit, estarÓ massa baix per a poder-ne gaudir.

Error: (1) can't find Taula_Contactescata3.jpg at /ServiAstro.VisibilitatTransit050612

En aquest enllaš es pot calcular els temps de contacte de Venus amb el perÝmetre del Sol per a qualsevol ciutat del mˇn

En aquest mapa es representa la visibilitat del trÓnsit al mˇn.

Visibilitat en colorca.jpg

Mapa de visibilitat del trÓnsit

En funciˇ de la zona horaria on els observadors estiguin situats podran veure el trÓnsit durant la tarda del dia 5 o el matÝ del dia 6, essent impossible de veure en tots aquells llocs on el sol no hagi sortit ho ja s'hagi post en el moment del trÓnsit.

ide bas-mes gran.jpg ieec70.gif LOGOPAMCOU.jpg logo-fecyt-jpg.jpg

 
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