(meteorobs) Correction Re: December 22, 2004 Meteor Observations From California

[Robert Lunsford]

The totals for this session should read:

2.00   6.73    1.67   0 ANT  4 COM  9 URS  10 SPO
                               23  TOTAL METEORS

Thanks to Karl Antier for pointing out this error!

Robert Lunsford

----- Original Message ----- 
From: "Robert Lunsford" <lunro.imo.usa at cox.net>
To: "Meteorobs" < meteorobs at meteorobs.org>
Sent: Thursday, December 23, 2004 10:21 AM
Subject: (meteorobs) December 22, 2004 Meteor Observations From California


>I viewed from the Deerhorn Valley Helipad this morning. Conditions were 
>less than ideal. The low clouds that obscured the city lights on the 
>previous morning were now gone. There was a strong glow in the western half 
>of the sky forcing me to view toward the northeast. On top of that there 
>was also cirrus clouds present that caused me to shift my field of view 
>throughout the night. I estimated that roughly one quarter of my total 
>field of view was affected during the first hour and roughly half of my 
>field was affected during the second hour. The meteors I did see tonight 
>were quite bright. Only one Ursid was seen during the first 52 minutes of 
>viewing. Three Ursids were seen in the next fifteen minutes and between 
>1243 and 1308, five more Ursids were seen. While these are low numbers, 
>this is the best Ursid showing for me in several years. Four COM's were 
>also seen and only one possible December Leonid was seen. The highlight of 
>the session was a -2 Coma Berenicid that shot high overhead heading west, 
>leaving a seven second persistent train.
>
> December 22 , 2004
>
> 1100-1204 UT   1.00   6.85    1.33   0 ANT  1 COM  3 URS   3  SPO
>                                                          7 TOTAL
>
> 1204-1311 UT   1.00   6.61    2.00   0 ANT  3 COM  6 URS  7 SPO
>                                                          16 TOTAL
>
> TOTALS:           2.00   6.73    1.67   2 ANT  3 COM  1 URS  21 SPO
>                                                          27  TOTAL METEORS
>
> The first column gives the period watched in Universal Time (UT)
> which is PST + 8 hours. The second column gives the percent of that
> particular hour actually spent observing the sky (1.00 = 100%, 0.99
> = 99%). Time is lost for breaks and plotting.  No breaks were taken.
> The third column gives the average limiting magnitude estimated during
> each period. The fourth column lists the correction for cloudiness where
> a clear sky = 1.00 and 50 percent obscuration = 2.00. The last several
> columns list the activity for expected active radiants during each period.
> Quite often no activity is observed and rates equal zero. Tonight I was
> facing north northeast with my field of view centered at 50 degrees 
> altitude.
> ANT = Antihelion radiant,COM = Coma Berenicids, URS = Ursids and
> SPO = Sporadics (random activity).
>
> Location: Deerhorn Valley Helipad 116 40' 04" W 32 44' 52" N  ELE = 750 m
>
> Bortle Scale Estimate: Class III (Rural Site)
>
> Beginning Temperature/Relative Humidity: 39 F (4 C)  56%
> Ending              "               "             "        40 F (4 C)  60%
>
> MAGNITUDES OF INDIVIDUAL METEORS PER RADIANT:
>
> COM  -2 (1) +1 (1) +2 (2) +3 (0) +4 (0) +5 (0)    AVG: +0.57
>
> URS:    0 (2) +1 (2) +2 (1) +3 (2) +4 (2) +5 (0)    AVG: +2.00
>
> SPO:  -1 (2) +1 (0) +2 (2) +3 (3)  +4 (2) +5 (1)    AVG: +2.40
>
>
> Bob Lunsford
> San Diego, CA
>
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