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During this period the moon reaches its full phase on Saturday September 14th. This will be the worst time of the month to try and view meteor activity as the bright moon will obscure all but the brightest meteors. Toward the end of this period the evening hours will be free of moonlight but rates during this time of night are low, seldom exceeding 5 meteors per hour. The estimated total hourly meteor rates for evening observers this week is near 3 for those viewing from the northern hemisphere and 2 for those located south of the equator. For morning observers the estimated total hourly rates should be near 8 as seen from mid-northern latitudes (45N) and 5 as seen from tropical southern locations (25S). The actual rates will also depend on factors such as personal light and motion perception, local weather conditions, alertness and experience in watching meteor activity. Rates are reduced during this period due to moonlight. Note that the hourly rates listed below are estimates as viewed from dark sky sites away from urban light sources. Observers viewing from urban areas will see less activity as only the brightest meteors will be visible from such locations.

The radiant (the area of the sky where meteors appear to shoot from) positions and rates listed below are exact for Saturday night/Sunday morning September 14/15. These positions do not change greatly day to day so the listed coordinates may be used during this entire period. Most star atlases (available at science stores and planetariums) will provide maps with grid lines of the celestial coordinates so that you may find out exactly where these positions are located in the sky. A planisphere or computer planetarium program is also useful in showing the sky at any time of night on any date of the year. Activity from each radiant is best seen when it is positioned highest in the sky, either due north or south along the meridian, depending on your latitude. It must be remembered that meteor activity is rarely seen at the radiant position. Rather they shoot outwards from the radiant so it is best to center your field of view so that the radiant lies at the edge and not the center. Viewing there will allow you to easily trace the path of each meteor back to the radiant (if it is a shower member) or in another direction if it is a sporadic. Meteor activity is not seen from radiants that are located below the horizon. The positions below are listed in a west to east manner in order of right ascension (celestial longitude). The positions listed first are located further west therefore are accessible earlier in the night while those listed further down the list rise later in the night.

These sources of meteoric activity are expected to be active this week.

Detailed descriptions of each source will continue next week when lunar conditions improve considerably.

Tags: Anthelion Meteors Daytime Sextantids Eta Eridanids Meteors Nu Eridanids September Epsilon Perseids September Meteor Activity September Meteor Showers

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Meteor Activity Outlook for September 14-20, 2019

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During this period the moon reaches its full phase on Saturday September 14th. This will be the worst time of the month to try and view meteor activity as the bright moon will obscure all but the brightest meteors.

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During this period the moon's phase waxes from just past its first quarter phase to nearly full. This weekend the moon's phase will be a waxing gibbous that will set soon after midnight local daylight saving time (LDST). This is good timing as the more active morning hours will be free of moonlight. With each passing night this window of dark sky shrinks until the moon sets near the start of dawn late in the week. The estimated total hourly meteor rates for evening observers this week is near 4 for those viewing from the northern hemisphere and 3 for those located south of the equator. For morning observers the estimated total hourly rates should be near 15 as seen from mid-northern latitudes (45N) and 9 as seen from tropical southern locations (25S). The actual rates will also depend on factors such as personal light and motion perception, local weather conditions, alertness and experience in watching meteor activity. Evening rates are reduced during this period due to moonlight. Note that the hourly rates listed below are estimates as viewed from dark sky sites away from urban light sources. Observers viewing from urban areas will see less activity as only the brightest meteors will be visible from such locations.

The radiant (the area of the sky where meteors appear to shoot from) positions and rates listed below are exact for Saturday night/Sunday morning September 7/8. These positions do not change greatly day to day so the listed coordinates may be used during this entire period. Most star atlases (available at science stores and planetariums) will provide maps with grid lines of the celestial coordinates so that you may find out exactly where these positions are located in the sky. A planisphere or computer planetarium program is also useful in showing the sky at any time of night on any date of the year. Activity from each radiant is best seen when it is positioned highest in the sky, either due north or south along the meridian, depending on your latitude. It must be remembered that meteor activity is rarely seen at the radiant position. Rather they shoot outwards from the radiant so it is best to center your field of view so that the radiant lies at the edge and not the center. Viewing there will allow you to easily trace the path of each meteor back to the radiant (if it is a shower member) or in another direction if it is a sporadic. Meteor activity is not seen from radiants that are located below the horizon. The positions below are listed in a west to east manner in order of right ascension (celestial longitude). The positions listed first are located further west therefore are accessible earlier in the night while those listed further down the list rise later in the night.

These sources of meteoric activity are expected to be active this week.

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The center of the large Anthelion (ANT) radiant is currently located at 23:52 (358) -01. This position lies in western Pisces, 3 degrees southeast of the 4 th magnitude star known as lambda Piscium. Due to the large size of this radiant, anthelion activity may also appear from eastern Aquarius as well as western Pisces. This radiant is best placed near 01:00 (LDST), when it lies on the meridian and is located highest in the sky. Rates at this time should be near 2 per hour no matter your location. With an entry velocity of 30 km/sec., the average anthelion meteor would be of slow velocity.

The September Epsilon Perseids (SPE) are active from September 3 through October 3 with the peak occurring on September 11th. The radiant is currently located at 03:01 (045) +39. This position lies in southwestern Perseus, only 1 degree northwest of the 3 rd magnitude star known as Gorgonea Tertia (rho Persei). The radiant is best placed near 0500 LDST, when it lies highest above the horizon. Rates are expected to be near 1 as seen from the northern hemisphere and less than 1 as seen from south of the equator. With an entry velocity of 65 km/sec., most activity from this radiant would be swift.

The nu Eridanids (NUE) were co-discovered by Japanese observers using SonotoCo and Juergen Rendtel and Sirko Molau of the IMO. Activity from this long-period stream stretches from August 24 all the way to November 16. Maximum activity occurs on September 24th. The radiant currently lies at 04:08 (062) +03, which places it in southwestern Taurus, 3 degrees southeast of the 4 th magnitude star known as nu Tauri. This area of the sky is best seen during the last dark hour before dawn when the radiant lies highest in a dark sky. Current rates are expected to be less than 1 per hour during this period no matter your location. With an entry velocity of 67 km/sec., the average meteor from this source would be of swift velocity.

The eta Eridanids (ERI) were discovered by Japanese observers back in 2001. Activity from this stream is seen from July 23 through September 17 with maximum activity occurring on August 11. The radiant currently lies at 04:33 (068) -04 which places it in western Eridanus, 2 degrees west of the 4th magnitude star known as mu Eridani). This area of the sky is best seen during the last dark hour before dawn when the radiant lies highest in a dark sky. Current rates are expected to be less than 1 per hour during this period no matter your location. With an entry velocity of 65 km/sec., the average meteor from this source would be of swift velocity. Note that this position is close to that of the nu Eridanids. Care must be taken to separate these two sources.

The last of the Daytime zeta Cancrids (ZCA) are expected this week. This stream is active from August 13 through September 10 with maximum activity occurring on September 3rd. The radiant is currently located at 09:22 (141) +11, which places it on the Cancer/Leo border, 4 degrees east of the 4 th magnitude star known as Acubens (alpha Cancri). This area of the sky is located only 30 degrees west of the sun so any possibility of seeing these meteors would be limited to the time just before the start of morning twilight. Current rates are expected to be less 1 per hour no matter your location. With an entry velocity of 42 km/sec., the average meteor from this source would be of medium velocity.

As seen from the tropical southern latitudes (25S), one would expect to see approximately 7 sporadic meteors per hour during the last hour before dawn as seen from rural observing sites. Evening rates would be near 2 per hour. As seen from mid-northern hemisphere (45N), morning rates would be near 11 per hour as seen from rural observing sites and 3 per hour during the evening hours. Locations between these two extremes would see activity between the listed figures. Evening rates are reduced during this period due to moonlight.

The list below offers the information from above in tabular form. Rates and positions are exact for Saturday night/Sunday morning except where noted in the shower descriptions.

Tags: Anthelion Meteors Daytime zeta Cancrids Eta Eridanids Meteors Nu Eridanids September Epsilon Perseids September Meteor Activity September Meteor Showers

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Meteor Activity Outlook for September 07-13, 2019

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During this period the moon's phase waxes from just past its first quarter phase to nearly full. This weekend the moon's phase will be a waxing gibbous that will set soon after midnight local daylight saving time (LDST). This is good timing as the more active morning hours will be free of moonlight.

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September offers longer nights in the northern hemisphere that tend to be less hazy than those experienced in mid-summer. In the sky, no major showers are visible from either hemisphere but the northern hemisphere enjoys the advantage of higher sporadic rates. Most of the shower activity this month is produced from the Perseus-Aurigid complex active this time of year. These showers rarely produce more than 5 meteors per hour but still manage to produce most of the shower activity seen this month. Unfortunately the Perseus-Aurigid complex lies too low in the northern sky for southern hemisphere observers to view very well. Video studies have shown that the Taurids are visible as early as September 23rd, therefore after this date the Anthelion radiant will no longer be listed until the Taurid showers end in December. The Anthelion meteors are still active but their radiant is superimposed upon that of the more numerous Taurids, therefore it is impossible to properly separate these meteors. Observers in the southern hemisphere suffer from some of their lowest rates of the year this month. The Taurid radiants are not too badly placed so observers south of the equator can expect to see a little of this activity from this source this month. Lastly, recent video data has shown that the Orionids are active during the last week of the month, often being the most active radiant in the sky even though their maximum is not until October 22nd.

During this period the moon's phase waxes from just past new to its first quarter phase. This weekend the moon will be a very slender crescent phase in the evening sky. It will set soon after it becomes dark and will not interfere with viewing meteor activity during this period. The estimated total hourly meteor rates for evening observers this week is near 5 for those viewing from the northern hemisphere and 3 for those located south of the equator. For morning observers the estimated total hourly rates should be near 17 as seen from mid-northern latitudes (45N) and 8 as seen from tropical southern locations (25S). The actual rates will also depend on factors such as personal light and motion perception, local weather conditions, alertness and experience in watching meteor activity. Note that the hourly rates listed below are estimates as viewed from dark sky sites away from urban light sources. Observers viewing from urban areas will see less activity as only the brightest meteors will be visible from such locations.

The radiant (the area of the sky where meteors appear to shoot from) positions and rates listed below are exact for Saturday night/Sunday morning August 31/September 1. These positions do not change greatly day to day so the listed coordinates may be used during this entire period. Most star atlases (available at science stores and planetariums) will provide maps with grid lines of the celestial coordinates so that you may find out exactly where these positions are located in the sky. A planisphere or computer planetarium program is also useful in showing the sky at any time of night on any date of the year. Activity from each radiant is best seen when it is positioned highest in the sky, either due north or south along the meridian, depending on your latitude. It must be remembered that meteor activity is rarely seen at the radiant position. Rather they shoot outwards from the radiant so it is best to center your field of view so that the radiant lies at the edge and not the center. Viewing there will allow you to easily trace the path of each meteor back to the radiant (if it is a shower member) or in another direction if it is a sporadic. Meteor activity is not seen from radiants that are located below the horizon. The positions below are listed in a west to east manner in order of right ascension (celestial longitude). The positions listed first are located further west therefore are accessible earlier in the night while those listed further down the list rise later in the night.

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These sources of meteoric activity are expected to be active this week.

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The center of the large Anthelion (ANT) radiant is currently located at 23:24 (351) -04. This position lies on the Aquarius/Pisces border, 4 degrees northeast of the 4th magnitude star known as phi Aquarii. Due to the large size of this radiant, anthelion activity may also appear from western Pisces as well as Aquarius. This radiant is best placed near 02:00 (LDST), when it lies on the meridian and is located highest in the sky. Rates at this time should be near 2 per hour no matter your location. With an entry velocity of 30 km/sec., the average anthelion meteor would be of slow velocity.

The first of the September Epsilon Perseids (SPE) should be seen this week. This stream is active from September 3 through October 3 with the peak occurring on September 11th. The radiant is currently located at 02:33 (038) +37. This position lies on the border of Triangulum and Andromeda, 3 degrees northeast of the 3rd magnitude star known as beta Trianguli. The radiant is best placed near 0500 LDST, when it lies highest above the horizon. Rates are expected to be less than 1 no matter your location. With an entry velocity of 65 km/sec., most activity from this radiant would be swift.

The nu Eridanids (NUE) were co-discovered by Japanese observers using SonotoCo and Juergen Rendtel and Sirko Molau of the IMO. Activity from this long-period stream stretches from August 24 all the way to November 16. Maximum activity occurs on September 24th. The radiant currently lies at 03:40 (055) +02, which places it in southwestern Taurus, 2 degrees northeast of the faint star known as 10 Tauri. This area of the sky is best seen during the last dark hour before dawn when the radiant lies highest in a dark sky. Current rates are expected to be less than 1 per hour during this period no matter your location. With an entry velocity of 67 km/sec., the average meteor from this source would be of swift velocity.

The eta Eridanids (ERI) were discovered by Japanese observers back in 2001. Activity from this stream is seen from July 23 through September 17 with maximum activity occurring on August 11. The radiant currently lies at 04:08 (062) -06 which places it in northern Eridanus, 2 degrees north of the 4th magnitude star known as Beid (Omicron¹ Eridani). This area of the sky is best seen during the last dark hour before dawn when the radiant lies highest in a dark sky. Current rates are expected to be less than 1 per hour during this period no matter your location. With an entry velocity of 65 km/sec., the average meteor from this source would be of swift velocity. Note that this position is close to that of the nu Eridanids. Care must be taken to separate these two sources.

The Aurigids (AUR) are currently active from a radiant located at 06:04 (091) +39. This area of the sky is located in eastern Auriga, 2 degrees north of the 3 rd magnitude star known as Mahasim (theta Aurigae A). This area of the sky is best seen during the last dark hour before dawn when the radiant lies highest in a dark sky. Current rates are expected to be near 3 per hour as seen from the northern hemisphere and less than 1 as seen from south of the equator. Maximum activity is expected to occur on September 1 st. With an entry velocity of 67 km/sec., the average meteor from this source would be of swift velocity.

The Daytime zeta Cancrids (ZCA) were discovered back in 1964 by C.S. Nilsson in a southern hemisphere radio survey of meteor streams. This stream is active from August 13 through September 10 with maximum activity occurring on September 3rd. The radiant is currently located at 08:57 (134) +12, which places it in southeastern Cancer, near the spot occupied by the 4 th magnitude star known as Acubens (alpha Cancri). This area of the sky is located only 30 degrees west of the sun so any possibility of seeing these meteors would be limited to the time just before the start of morning twilight. Current rates are expected to be less 1 per hour no matter your location. With an entry velocity of 42 km/sec., the average meteor from this source would be of medium velocity.

As seen from the tropical southern latitudes (25S), one would expect to see approximately 5 sporadic meteors per hour during the last hour before dawn as seen from rural observing sites. Evening rates would be near 2 per hour. As seen from mid-northern hemisphere (45N), morning rates would be near 12 per hour as seen from rural observing sites and 4 per hour during the evening hours. Locations between these two extremes would see activity between the listed figures.

The list below offers the information from above in tabular form. Rates and positions are exact for Saturday night/Sunday morning except where noted in the shower descriptions.

Tags: Anthelion Meteors August Meteor Activity August Meteor Showers Aurigids Daytime zeta Cancrids Eta Eridanids Meteors Nu Eridanids September Epsilon Perseids September Meteor Activity September Meteor Showers

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Meteor Activity Outlook for August 31-September 6, 2019

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September offers longer nights in the northern hemisphere that tend to be less hazy than those experienced in mid-summer. In the sky, no major showers are visible from either hemisphere but the northern hemisphere enjoys the advantage of higher sporadic rates. Most of the shower activity this month is produced from the Perseus-Aurigid complex active this time of year.

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