Meteor Shower: Aug 2004 to Dec 2004

[weixing]

Hi,
For those who interested in Meteor Shower, below is the list of Meteor Shower from August 2004 to December 2004:

Northern delta-Aquarids
Date: July 15-August 25
Maximum: August 8

Northern iota-Aquarids
Date: August 11-31
Maximum: August 19

Perseids
Date: July 17-August 24
Maximum: August 12, 11h - 13h 20m UT

kappa-Cygnids
Date: August 3-25
Maximum: August 17

delta-Aurigids
Date: September 5 - October 10
Maximum: September 9

Piscids
Date: September 1-30
Maximum: September 19

Draconids
Date: October 6-10
Maximum: October 8, 10h UT

epsilon-Geminids
Date: October 14-27
Maximum: October 18

Orionids
Date: October 2 - November 7
Maximum: October 21

Southern Taurids
Date: October 1-November 25
Maximum: November 5

Northern Taurids
Date: October 1-November 25
Maximum: November 12

Leonids
Date: November 14-21
Maximum: November 17, 8h 25m UT

alpha-Monocerotids
Date: November 15-25
Maximum: November 21, 8h 45m UT

Phoenicids
Date: November 28-December 9
Maximum: December 6, 2h 35m UT

Puppid-Velids
Date: December 1-December 15
Maximum: December 6

Monocerotids
Date: November 27-December 17
Maximum: December 8

sigma-Hydrids
Date: December 03-15
Maximum: December 11

Geminids
Date: December 7-17
Maximum: December 13, 22h 20m UT

Coma Berenicids
Date: December 12 - January 23
Maximum: December 19

Have a nice day.

[QuantumGravity]

Nice list. Maybe you could also add the ZHR of each shower? 'Cause in Singapore skies, there's no point catching those with low ZHR like 20 or so...

[fizzy123]

I thought tis might be useful....... 8)

Quadrantids. Generally visible between December 28 and January 6, the Quadrantids have a sharp activity peak around January 3. Typical rates vary between 40 and 100 per hour; about 5 percent leave trains. When the shower was first recognized as annual in 1839, the radiant occurred in a constellation no longer recognized — Quadrans Muralis (Wall Quadrant). It's now divided between Hercules, Boötes, and Draco. The cold nights of northern winters and typically faint meteors keep this shower from being truly popular.

Until late 2003, this was the only major meteor shower whose parent body remained unknown. But that year astronomers found a near-Earth asteroid named 2003 EH1. When astronomers estimated the theoretical speed and radiant for a hypothetical meteor shower caused by particles from 2003 EH1, the results fell squarely in the middle of those measured for the Quadrantids by meteor observers. Astronomers suspect the object is a fragment from the breakup of a comet — and perhaps the event that gave birth to the Quadrantids.

Lyrids. The Lyrids appear from April 16 to 25 and peak (at 10 to 15 per hour) around April 21; the radiant lies between Hercules and Lyra. Chinese observations of this display date back to 687 b.c., making the Lyrids the earliest recorded meteor shower. Astronomers recognized the Lyrids as an annual shower in 1839 and connected it it to its parent comet, C\1861 G1, in 1867. Lyrid meteors are bright and rather fast (30 miles [48 km] per second), and about 15 percent leave persistent trains.

Eta Aquarids. The first of the year's two showers that derive from Halley's Comet, the Eta Aquarids occur from April 19 to May 28, with a peak (10 to 20 per hour) around May 6. This shower is best for observers in the Southern Hemisphere, where the hourly rate climbs to about 50. The radiant is located near the Y-shaped asterism in Aquarius and named for one of those stars. The shower was discovered in 1870 and linked to Halley in 1876. The meteors are among the fastest (42 miles [67 km] per second) and are faint on average, but the brighter ones have a yellowish color; about 30 percent leave trains.

Southern Delta Aquarids. This is the most active of a diffuse group of streams and, as the name suggests, is best seen in the Southern Hemisphere. These meteors may be seen between July 12 and August 19 and peak (15 to 20 per hour) near July 28. The meteors are medium speed (27 miles [43 km] per second); they tend to be faint, and few leave trains.

Perseids. The best known of all meteor showers, the Perseids never fail to put on a good show and — thanks to the shower's late-summer peak — are usually widely observed. The earliest record of this event comes from China in a.d. 36. Generally visible from July 17 to August 24, meteor speed (37 miles [60 km] per second), brightness, and a high proportion of trains (45 percent) distinguish the Perseids from other showers active at this time. It became the first meteor shower linked to a comet (109P/Swift-Tuttle) in 1865. Models of the Perseids predict a gradual decline in activity from a peak in 2004.

Draconids. The Draconids are sometimes called the Giacobinids; in a break with convention, this name honors the shower's parent comet, 21P/Giacobini-Zinner. Draconid activity occurs between October 6 and 10, with a peak on October 8 (if it occurs at all). In 1933 and 1946, the shower produced brief but intense meteor storms (more than 5,000 per hour); in 1998, it reached a rate of about 500 meteors an hour over eastern Europe. The occurrence of the shower is intimately tied to the proximity of its parent comet. According to Donald Yeomans, a comet expert at the Jet Propulsion Laboratory in Pasadena, California, the most intense showers occur when Earth grazes the comet's orbit within a few months of its passage. When Comet Giacobini-Zinner returns in 2005, astronomers expect a short-lived outburst of hundreds of meteors an hour. Most researchers agree that a full-fledged meteor storm — defined as 1,000 meteors an hour or more — will occur in 2018. Draconids are slow-moving meteors, encountering Earth at less than 12 miles (20 km) per second, and they typically are faint.

Orionids. This is the sister stream of the Eta Aquarids, also arising from the debris of Halley's Comet. Discovered in 1864, the Orionids were not linked to Halley until 1911. Orionid meteors can be found between October 2 and November 7, with a peak of about 25 per hour around October 21. Orionid meteors are among the fastest (42 miles [67 km] per second); they generally are faint, and about 20 percent leave trains that persist one or two seconds.

Southern Taurids. Visible between October 1 and November 25, this is the strongest of several streams originating from Comet Encke. A broad maximum occurs between November 3 and 5, but this shower usually brings an hourly rate of less than 15 meteors. The shower was first recognized in 1869 and was associated with Comet Encke in 1940. Its meteors generally are faint and quite slow (19 miles [30 km] a second) because they approach Earth from behind and must catch up.

Leonids. Leonid meteors generally arrive between November 14 and 21, with a peak hourly rate on November 17 of between 10 and 15 meteors per hour; about half of these meteors leave trains that can persist for several minutes. Because Earth runs into the orbiting particles almost directly head-on, Leonid meteors travel faster than those of any other shower — 45 miles (71 km) per second. The shower's most notable feature is its habit of producing periodic, dramatic meteor storms as Earth intercepts streams of dense material ejected at previous returns of Comet Tempel-Tuttle. Our planet passed through such streams annually from 1998 to 2003. Although small outbursts of up to 200 meteors per hour have been forecast for 2006 and 2007, computer models show that Jupiter's tug on the dense Leonid streams causes them to miss Earth until at least 2098. Because the stream responsible for the predicted outbursts was ejected in 1933, only its smallest particles have been able to drift into a path that Earth will intersect. This means any outburst, if one occurs at all, will be rich in faint meteors.

Geminids. The Geminids are active between December 7 and 17 and peak near December 13, with typical hourly meteor rates around 80 but occasionally more than 100. Because the Geminids intersect Earth's orbit near the side directly opposite the Sun, this shower is one of the few that are good before midnight. The parent body of the Geminids is a curious object designated 3200 Phaethon. What makes Phaethon interesting is that it appears to be an asteroid instead of a comet. Planetary scientists suggest that many of the asteroids whose orbits cross Earth's may be, in fact, worn-out comets.

[fizzy123]

I thought tis might be useful....... 8)

Quadrantids. Generally visible between December 28 and January 6, the Quadrantids have a sharp activity peak around January 3. Typical rates vary between 40 and 100 per hour; about 5 percent leave trains. When the shower was first recognized as annual in 1839, the radiant occurred in a constellation no longer recognized — Quadrans Muralis (Wall Quadrant). It's now divided between Hercules, Boötes, and Draco. The cold nights of northern winters and typically faint meteors keep this shower from being truly popular.

Until late 2003, this was the only major meteor shower whose parent body remained unknown. But that year astronomers found a near-Earth asteroid named 2003 EH1. When astronomers estimated the theoretical speed and radiant for a hypothetical meteor shower caused by particles from 2003 EH1, the results fell squarely in the middle of those measured for the Quadrantids by meteor observers. Astronomers suspect the object is a fragment from the breakup of a comet — and perhaps the event that gave birth to the Quadrantids.

Lyrids. The Lyrids appear from April 16 to 25 and peak (at 10 to 15 per hour) around April 21; the radiant lies between Hercules and Lyra. Chinese observations of this display date back to 687 b.c., making the Lyrids the earliest recorded meteor shower. Astronomers recognized the Lyrids as an annual shower in 1839 and connected it it to its parent comet, C\1861 G1, in 1867. Lyrid meteors are bright and rather fast (30 miles [48 km] per second), and about 15 percent leave persistent trains.

Eta Aquarids. The first of the year's two showers that derive from Halley's Comet, the Eta Aquarids occur from April 19 to May 28, with a peak (10 to 20 per hour) around May 6. This shower is best for observers in the Southern Hemisphere, where the hourly rate climbs to about 50. The radiant is located near the Y-shaped asterism in Aquarius and named for one of those stars. The shower was discovered in 1870 and linked to Halley in 1876. The meteors are among the fastest (42 miles [67 km] per second) and are faint on average, but the brighter ones have a yellowish color; about 30 percent leave trains.

Southern Delta Aquarids. This is the most active of a diffuse group of streams and, as the name suggests, is best seen in the Southern Hemisphere. These meteors may be seen between July 12 and August 19 and peak (15 to 20 per hour) near July 28. The meteors are medium speed (27 miles [43 km] per second); they tend to be faint, and few leave trains.

Perseids. The best known of all meteor showers, the Perseids never fail to put on a good show and — thanks to the shower's late-summer peak — are usually widely observed. The earliest record of this event comes from China in a.d. 36. Generally visible from July 17 to August 24, meteor speed (37 miles [60 km] per second), brightness, and a high proportion of trains (45 percent) distinguish the Perseids from other showers active at this time. It became the first meteor shower linked to a comet (109P/Swift-Tuttle) in 1865. Models of the Perseids predict a gradual decline in activity from a peak in 2004.

Draconids. The Draconids are sometimes called the Giacobinids; in a break with convention, this name honors the shower's parent comet, 21P/Giacobini-Zinner. Draconid activity occurs between October 6 and 10, with a peak on October 8 (if it occurs at all). In 1933 and 1946, the shower produced brief but intense meteor storms (more than 5,000 per hour); in 1998, it reached a rate of about 500 meteors an hour over eastern Europe. The occurrence of the shower is intimately tied to the proximity of its parent comet. According to Donald Yeomans, a comet expert at the Jet Propulsion Laboratory in Pasadena, California, the most intense showers occur when Earth grazes the comet's orbit within a few months of its passage. When Comet Giacobini-Zinner returns in 2005, astronomers expect a short-lived outburst of hundreds of meteors an hour. Most researchers agree that a full-fledged meteor storm — defined as 1,000 meteors an hour or more — will occur in 2018. Draconids are slow-moving meteors, encountering Earth at less than 12 miles (20 km) per second, and they typically are faint.

Orionids. This is the sister stream of the Eta Aquarids, also arising from the debris of Halley's Comet. Discovered in 1864, the Orionids were not linked to Halley until 1911. Orionid meteors can be found between October 2 and November 7, with a peak of about 25 per hour around October 21. Orionid meteors are among the fastest (42 miles [67 km] per second); they generally are faint, and about 20 percent leave trains that persist one or two seconds.

Southern Taurids. Visible between October 1 and November 25, this is the strongest of several streams originating from Comet Encke. A broad maximum occurs between November 3 and 5, but this shower usually brings an hourly rate of less than 15 meteors. The shower was first recognized in 1869 and was associated with Comet Encke in 1940. Its meteors generally are faint and quite slow (19 miles [30 km] a second) because they approach Earth from behind and must catch up.

Leonids. Leonid meteors generally arrive between November 14 and 21, with a peak hourly rate on November 17 of between 10 and 15 meteors per hour; about half of these meteors leave trains that can persist for several minutes. Because Earth runs into the orbiting particles almost directly head-on, Leonid meteors travel faster than those of any other shower — 45 miles (71 km) per second. The shower's most notable feature is its habit of producing periodic, dramatic meteor storms as Earth intercepts streams of dense material ejected at previous returns of Comet Tempel-Tuttle. Our planet passed through such streams annually from 1998 to 2003. Although small outbursts of up to 200 meteors per hour have been forecast for 2006 and 2007, computer models show that Jupiter's tug on the dense Leonid streams causes them to miss Earth until at least 2098. Because the stream responsible for the predicted outbursts was ejected in 1933, only its smallest particles have been able to drift into a path that Earth will intersect. This means any outburst, if one occurs at all, will be rich in faint meteors.

Geminids. The Geminids are active between December 7 and 17 and peak near December 13, with typical hourly meteor rates around 80 but occasionally more than 100. Because the Geminids intersect Earth's orbit near the side directly opposite the Sun, this shower is one of the few that are good before midnight. The parent body of the Geminids is a curious object designated 3200 Phaethon. What makes Phaethon interesting is that it appears to be an asteroid instead of a comet. Planetary scientists suggest that many of the asteroids whose orbits cross Earth's may be, in fact, worn-out comets.