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(meteorobs) Fwd: Perseids from Iran - 13/14 Aug 1999
Again, Amir is not a current subscriber of 'meteorobs': if you reply
or follow up, be sure to MANUALLY put 'hasanzad@PHYSICS.sharif.ac.ir'
in the "CC:" line of your response. Clear skies! -Lew Gramer
------- Forwarded Message
From: hasanzad@PHYSICS.sharif.ac.ir
Date: Sat, 02 Oct 1999 09:58:42 EDT
To: imo-news@imodot net
Cc: hasanzad@PHYSICS.sharif.ac.ir
Subj: connection,perseids from IRAN(2)
north star group(N.S.G)
Rasht-Iran
Dear friends,
thirth perseids meteor stream report:
13,14 aug 1999 place:Zyar-Isfahan-Iran lat:32.4N long:52.0E
1)Davod Hammati observer
2)Amir Hasanzadeh observer
3)Mostafa Mosavizadeh observer
4)Soheil Khoshbinfar photographer
5)Ali Jafari writer of notes
first information:
coordinates of center of radiant: DEC:+58 RA:46 (degree)
r=2.6 {ref:1999 meteor shower calender}
period the number of mag. of the most length of the number of most
(UT) meteors luminous longest sporadic color
(+_0.5) (degree)
------------------------------------------------------------------------------
19:30-20:00 10 0 10 7 orange-yellow
20:00-20:30 9 -2 20 3 orange-yellow
20:30-21:00 10 -1 10 4 yellow
21:00-21:30 14 +0.5 15 3 yellow
21:30-22:00 20 -6 20 7 yellow
22:00-22:30 11 -0.5 20 6 orange-yellow
22:30-23:00 15 -0.5 15 3 white-yellow
23:00-23:30 14 0 15 3 yellow
23:30-00:00 26 -1 15 10 orange-yellow
00:00-00:30 22 -2.5 10 7 orange-yellow
00:30-01:00 23 -2.5 15 6 yellow
-----------------------------------------------------------------------------
length(degree) 1-6 6-11 11-16 16<
------------------------------------------------------------------
number 73 55 11 10
total:149
----------------------------------------------------------------------------
6.9 5.9 4.9 3.9 2.9 1.9
| | | | | |
magnitude 6.0 5.0 4.0 3.0 2.0 1.0
-----------------------------------------------------------
number 0 3 5 27 46 38
0.9 0 -1 -2 -3 -4 -5 -6
| | | | | | | |
magnitude 0.1 -0.9 -1.9 -2.9 -3.9 -4.9 -5.9 -6.9
------------------------------------------------------------
number 17 3 6 2 0 1 0 1
-----------------------------------------------------------
average mag=+1.84
------------------------------------------------------------
color of yellow yellow-white yellow-orange blue white red blue-white
meteors
number 61 15 36 0 25 0 2
-----------------------------------------------------------------------------
period N LM ST C CP Haverage ZHR
(UT) (degree)
-----------------------------------------------------------------------
19:30-20:00 10 5.7 20h 29m 0 2.4 27.3 102+_32
20:00-20:30 9 5.7 20h 59m 0 1.6 28.2 60+_20
20:30-21:00 10 5.9 21h 29 0 1.7 32.0 47+_15
21:00-21:30 14 5.9 21h 59m 0 1.3 35.5 44+_12
21:30-22:00 20 6.1 22h 29m 0 2.3 39.6 86+_19
22:00-22:30 11 6.1 22h 59m 0 2.0 43.4 38+_11
22:30-23:00 15 6.1 23h 29m 0 1.0 47.2 23+_6
23:00-23:30 14 5.8 23h 59m 0 1.4 51.0 36+_10
23:30-00:00 26 5.8 00h 29 0 2.3 54.6 102+_20
00:00-00:30 22 5.2 00h 59 0 2.4 57.8 150+_32
- ------------------------------------------------------------------------
notes and formula:
N :the number of meteors
Haverage: average altitude of center of radiant
C:cloud
nobs=3
k=1.4
ST:siderial time(begin period)
CP:coefficient of perception
6.5-lm
ZHR=( N *r *cp )/( k )
nobs*[sin(Hav)]*Teff*(1-c)
f observers
(6.5-Lm)
cp=(Ns*3.4 )/(Teff*10) 0.4=<cp<=2.5
Ns:the number of sporadic
{ref: Jenniskens P. astron.astrophys.287}
north star group(NSG)
Amir Hassanzadeh
sharif university of technology
------- End of Forwarded Message
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