(meteorobs) July 22, 2004 Observations from California
Robert Lunsford
lunro.imo.usa at cox.net
Sun Aug 8 18:55:16 EDT 2004
This was my first session since the June Bootids. I watched from the Pine
Valley Viewpoint, on the west side of the Laguna Mountains. Stratus
clouds covered the coastal cities and the sky was impressively dark.
Several limiting magnitude counts exceeded +7.0. Meteor activity
was impressive and on the faint side. I don't believe I have ever had
such a faint average magnitude for my sporadic meteors (+3.68).
Perseids were active this morning as where the "Perseid Pretenders"
from the northern apex radiant.
July 22, 2004
0730-0830 UT 1.00 6.95 2 ANT 0 ACY 3 CAP 1 NDA 0 PAU
1 PER 1 SDA 0 NPX 4 SPO
12 TOTAL
0830-0930 UT 1.00 6.90 0 ANT 2 ACY 6 CAP 1 NDA 0 PAU
1 PER 1 SDA 3 NPX 5 SPO
19 TOTAL
0930-1030 UT 1.00 6.89 1 ANT 0 ACY 1 CAP 0 NDA 0 PAU
1 PER 4 SDA 0 NPX 7 SPO
14 TOTAL
1030-1130 UT 1.00 6.88 0 ANT 2 ACY 2 CAP 0 NDA 1 PAU
3 PER 0 SDA 1 NPX 15 SPO
24 TOTAL
TOTALS: 4.00 6.91 3 ANT 4 ACY 12 CAP 2 NDA 1 PAU
6 PER 6 SDA 4 NPX 31 SPO
69 TOTAL
The first column gives the period watched stated in Universal Time (UT)
which is PDT + 7 hours. The second column gives the percent of that
particular hour actually spent observing the sky. Time was lost tonight due
to plotting and data entry on paper. The third column gives the average
limiting magnitude estimated during each period. The last several columns
list the activity seen during each period. I was facing north south at an
altitude of 50 degrees during the entire session. No breaks were taken.
ANT = Antihelions, ACY = Alpha Cygnids, CAP = Alpha
Capricornids, NDA = North Delta Aquarids, PAU = Pisces Austrinids,
PER = Perseids, SDA = South Delta Aquarids, NPX = Northern Apex
and SPO = Sporadics (random activity).
Location: Pine Valley Viewpoint 116 29' 43" W 32 49' 49" N ELE = 1300 m
Bortle Scale Estimate: Class II Typical Truly Dark Site
Beginning Temperature/Relative Humidity: 67 F (19 C) 39%
Ending " " " 68 F (20 C) 35%
MAGNITUDES:
ANT: 0 (0) +1 (0) +2 (0) +3 (0) +4 (2) +5 (1) +6 (0) AVE: +4.30
ACY : 0 (1) +1 (0) +2 (1) +3 (2) +4 (0) +5 (0) +6 (0) AVE: +2.00
CAP: -1 (1) 0 (2) +1 (1) +2 (1) +3 (1) +4 (5) +5 (1) AVE: +2.33
NDA : 0 (0) +1 (1) +2 (1) +3 (0) +4 (0) +5 (0) +6 (0) AVE: +1.50
PAU: 0 (0) +1 (0) +2 (0) +3 (0) +4 (1) +5 (0) +6 (0) AVE: +4.00
PER : 0 (1) +1 (2) +2 (1) +3 (0) +4 (2) +5 (0) +6 (0) AVE: +2.00
SDA : 0 (0) +1 (1) +2 (0) +3 (3) +4 (0) +5 (2) +6 (0) AVE: +3.33
NPX: -1 (1) 0 (1) +1 (0) +2 (0) +3 (1) +4 (1) +5 (0) AVE: +1.50
SPO: -3 (1) 0 (1) +2 (3) +3 (6) +4 (9) +5 (9) +6 (2) AVE: +3.68
Bob Lunsford
San Diego, CA USA
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