(meteorobs) Meteor Activity Outlook for June 11-17, 2016

Paul Jones jonesp0854 at gmail.com
Sat Jun 11 12:06:19 EDT 2016


Roger that and congratulations!, George!  Same here on my weather:  50/50
at best.  I'll be out there in the morning with bells on though, if I can
be...;o).

Happy hunting, Paul J in North Florida

On Sat, Jun 11, 2016 at 11:44 AM, george <gwgliba at gmail.com> wrote:

> Paul,
>
> Yes.   The weather looks 50/50 here for tonite.  The June Lyrid radiant is
> about
> 20 degrees South of this position and peaks in 3 days.
>
> Starry Skies,
> GWG
>
> My 2lst Wedding Anniversary
>
> & 1st anniversary of the named
> asteroid 4817 Gliba
>
> Citation:
> http://minorplanetcenter.net/db_search/show_object?utf8=✓&object_id=gliba
>
>
>
> On Jun 11, 2016, at 11:01 AM, Paul Jones <jonesp0854 at gmail.com> wrote:
>
> Thanks George.  Is that from the 278 +45 radiant position I saw mentioned?
>
> On Sat, Jun 11, 2016 at 10:12 AM, george <gwgliba at gmail.com> wrote:
>
>> Meteor Observers,
>>
>> Look for possible Xi Draconids discovered June 11/12, 1996 by Robert
>> Lunsford,
>> George Zay, and Marco Langbroek.
>>
>> Starry Skies,
>> GWG
>>
>>
>>
>> > On Jun 10, 2016, at 2:36 PM, Robert Lunsford <lunro.imo.usa at cox.net>
>> wrote:
>> >
>> > During this period the moon reaches its first quarter phase on Saturday
>> June 11th. At this time the half-illuminated moon will lie 90 degrees east
>> of the sun and will set soon after midnight for most locations located at
>> mid-northern latitudes. As the week progresses the window of opportunity
>> for viewing meteors in dark skies decreases with each passing night. Toward
>> the end of the period the nearly full moon will lie above the horizon
>> nearly all night long, making meteor observations difficult. The estimated
>> total hourly meteor rates for evening observers this week is near 2 for
>> observers located in the northern hemisphere and 3 for observers located in
>> tropical southern locations (25S). For morning observers the estimated
>> total hourly rates should be near 8 as seen from mid-northern latitudes
>> (45N) and 12 as seen from tropical southern locations (25S). Evening rates
>> are reduced during this period due to interfering moonlight. 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 June 11/12. 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 far 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.
>> >
>> > The center of the large Anthelion (ANT) radiant is currently located at
>> 18:16 (274) -23. This position lies in western Sagittarius, 3 degrees south
>> of the 4th magnitude star known as Polis (mu Sagittarii).  Due to the large
>> size of this radiant, Anthelion activity may also appear from the nearby
>> constellations of Scutum, Serpens Caput, southern Ophiuchus, and
>> southeastern Scorpius as well as Sagittarius. This radiant is best placed
>> near 0200 local daylight saving (LDST), when it lies on the meridian and is
>> located highest in the sky. Hourly rates at this time should be near 2 as
>> seen from mid-northern latitudes and 3 as seen from tropical southern
>> latitudes. With an entry velocity of 30 km/sec., the average Anthelion
>> meteor would be of slow velocity.
>> >
>> > The Northern June Aquilids (NCZ) were discovered by Zdenek Sekanina
>> through his Radio Meteor Project at Havana, Illinois. These meteors are
>> active from June 10-26, which maximum activity occurring on the 16th. The
>> current position of the radiant is 19:37 (294) -11. This position lies in a
>> remote area of southern Aquila near the Sagittarius border. The nearest
>> notable star is 3rd magnitude Algiedi (Alpha Capricorni), which lies 9
>> degrees to the east. Rates, even at maximum, are expected to be less than 1
>> per hour. With an entry velocity of 41 km/sec., the average Northern June
>> Aquilid meteor would be of medium speed.
>> >
>> > The June Rho Cygnids (JRC) is a shower of short duration discovered by
>> Damir Šegon and associates of the Croatian Meteor Network. These meteors
>> are only active from June 14-16, with maximum activity occurring on the
>> 14th. The radiant position at maximum lies at 21:22 (320) +45. This area of
>> the sky lies in northeastern Cygnus, 4 degrees west of the 4th magnitude
>> star known as rho Cygni. These meteors are best seen near during the last
>> dark hour of the night when the radiant lies highest in a dark sky. These
>> meteors are better seen from the northern hemisphere where the radiant
>> rises higher into the sky before the start of morning twilight. Hourly
>> rates, are expected to remain less than 1. With an entry velocity of 48
>> kilometers per second, a majority of these meteors will appear to move with
>> medium velocities. This shower is synonymous with shower #521 JRP in the
>> IAU Meteor Catalog.
>> >
>> > The Pi Piscids (PPS) were discovered by Dr. Peter Brown in his
>> meteoroid stream survey using the Canadian Meteor Orbit Radar. This shower
>> was later verified by Dr. Peter Jenniskens and David Holman using data from
>> the CAMS network in northern California. These meteors are active from June
>> 11 through July 25 with maximum activity occurring on July 1st. The current
>> position of the radiant is 00:00 (000) +18. This position actually lies in
>> southeastern Pegasus, 4 degrees northwest of the 3rd magnitude star known
>> as Algenib (Gamma Pegasi). Rates are currently expected to be less than 1
>> per hour no matter your location. With an entry velocity of 68 km/sec., the
>> average Pi Piscid meteor would be of swift speed.
>> >
>> > The radiant for the Daytime Arietids (ARI) only lies 45 degrees west of
>> the sun. Therefore these meteors can only be seen between the time the
>> radiant rises and dawn. This is a small window of opportunity that lasts
>> for about an hour before the break of dawn. Maximum activity for this
>> shower was expected on June 7th. The current position of the radiant is
>> 03:16 (049) +24. This position lies in eastern Aries, a little more than 5
>> degrees west of the naked eye open star cluster known as the Pleiades or 7
>> Sisters. Despite being a strong source of meteors, visual members of this
>> shower are rare due to the low altitude of the radiant. If this radiant was
>> better placed in the sky it would rival the better known Perseids of
>> August. These meteors are the strongest source of radio meteors for the
>> entire year. With an entry velocity of 42 km/sec., the average Daytime
>> Arietid meteor would be of medium speed.
>> >
>> > As seen from the mid-northern hemisphere (45N) one would expect to see
>> approximately 6 sporadic meteors per hour during the last hour before dawn
>> as seen from rural observing sites. Evening rates would be near 1 per hour.
>> As seen from the tropical southern latitudes (25S), morning rates would be
>> near 9 per hour as seen from rural observing sites and 2 per hour during
>> the evening hours. Locations between these two extremes would see activity
>> between the listed figures. Evening rates during this period are reduced
>> due to moonlight.
>> >
>> > The list below offers the information from above in condensed form.
>> Rates and
>> > positions are exact for Saturday night/Sunday morning except where
>> noted in the
>> > shower descriptions.
>> >
>> > Anthelion (ANT) -  17:48 (267) -23  Velocity - 30km/sec.
>> > Northern Hemisphere - 2 per hr.   Southern Hemisphere - 3 per hr
>> >
>> > Northern June Aquilids (NCZ) -  19:37 (294) -11  Velocity - 41km/sec.
>> > Northern Hemisphere - <1 per hr.   Southern Hemisphere - <1 per hr
>> >
>> > June Rho Cygnids (JRC) -  21:22 (320) +45  Velocity - 48km/sec.
>> > Northern Hemisphere - <1 per hr.   Southern Hemisphere - <1 per hr
>> >
>> > Pi Piscids (PPS) -  00:00 (000) +18  Velocity - 68km/sec.
>> > Northern Hemisphere - <1 per hr.   Southern Hemisphere - <1 per hr
>> >
>> > Daytime Arietids (ARI)        -  02:48 (042) +23  Velocity - 42km/sec.
>> > Northern Hemisphere - 1 per hr.   Southern Hemisphere - <1 per hr
>> >
>> > Clear Skies!
>> >
>> > Robert Lunsford
>> > American Meteor Society
>> >
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