Attempt to determine the distance, the speed and the path of the shooting stars from J.F. Benzenberg and H.W. Branders

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    This is my first foray attempting a local astronomical society talk on the detection of meteors and decided to start with the one recorded at Gottingen about 1800. Initially I tried to plot the locations and distances, but these did not seem to tie up?

     In fact, the maps in some papers were orientated east, west rather than north south. For example https://www.lpi.usra.edu/meetings/metsoc2000/pdf/5008.pdf

     I approached Bill Barton, FRAS. Deputy Director, British Astronomical Association Historical Section.

    And he kindly directed me to

    Ref https://babel.hathitrust.org/cgi/pt?id=uc1.b4433470&view=1up&seq=236

     I have five main questions about this paper “Attempt to determine the distance, the speed and the path of the shooting stars from J.F. Benzenberg and H.W. Branders” and would appreciate direction and help.

     My Questions

    1              Equipped with an exact timer, a star map and a lantern supplied by their professor, Lichtenberg. What was an exact timer at this period in history? Something like a German equivalent of Harrisons’s H4? I am considering sources of error, repeatability etc.

     

    2              Benzenberg at Clausberg, Point B, exactly where is this place? Page 225 of the Babel link, line 4 and using Google Translate I get: “They choose a cemetery in front of Clausberg, on the mountain of the same name near Gottingen for their first measurement. Point, A. On the other hand, initially a field near Ellershaufen, but after the 6th corresponding observation they moved the baseline to point ‘C’ Sesebuhl near Dransfeld.

     

    3              Brandes at Ellershausen, Point A, should this be Elliehausen? It seems to orientate better with the maps in other papers.

     

    Their initial measurements taken from points A and B did not support the atmospheric origin of meteors idea. So, a new baseline established from point B, length 15,615m. To point C, Sesebuhl, (51.49881N, 9.78830E a mountain peak at 445m east of Dransfeld).

     4              Line 9 of the Babel link; According to Meffungen, which Mr. Obrift-Lieutenant Muller informed them in Gottingen, the former ground line was 27050, the latter 46200 parif?. Fufs (Fuss?), (2.1 geogr. Miles) long, and the azimuth of the extended was 64 1/2 degree. the latter 64 degrees far from the southern part of the meridian. (Gottingen, Hanover; Fuβ (foot) = 291mm (11.91 in))

    The units of measurement seem to change depending on your geographic location in Germany at this time?

    5              Finally, the table of results follows and with the aid of Google Translate, my interpretation of the table follows. Pages 224 and 227 of https://babel.hathitrust.org/cgi/pt?id=uc1.b4433470&view=1up&seq=239

     

     

    My Google Translation:

    Attempt

    to determine the distance, the speed and  

    the path of the shooting stars

    from

    J.F. Benzenberg und H.W. Branders

     

    PAGE 227

     

    Number of correfp observation

    Distance of the vanishing point from the Earth

    The rest of the nature of the shooting stars

    4th

    more than 30 miles

    Surpassed stars of the first size: curved

    19th

    23 miles

    Stars equal to the first size: long

    18th

    20.4

    Second size stars: slowly

    13th

    16.8

    Third size stars equal: slowly

    11th

    16.5

    Stars first to second size the same

    9th

    13

    Second largest; curled:

    12th    

    12.9

    Second largest

    22nd

    11.5

    First big: curly slow

    7th

    11.3

    Second great

    15th

    10.8

    Third great; quick

    20th

    10.2

    First to second size: slow

    16th

    9.6

    Fourth to fifth greats

    8th

    8.8

    First great; curly

    14th

    6.9

    Fifth greatest

    6th

    4.5

    Fourth great, very quick

    1st

    3.5

    Third great

    5th

    1.4

    pallid (a little unreliable)

     

    Overview of the more fully observed

     

     

    Remove from the earth

    Remove from the earth

     

     

     

     

    of the starting point

    The end point

    Trail length

    True speed

    Inclination of the web to the vertical

    12th

    5 ¼ Mile

    12.9 M

    7.6 M

    Faft = 0

    17th

    4.9 M

    10.8 M

    10 M

     

    54 deg

    22nd

    17 M

    11.5 M

    8.5 M

    4 to 5M in 1 sec

    47 deg

    20th

    16 M

    10.2 M

    9 M

    about 6M in 1 sec

    54 deg

     

     

    Thank you for any comments

    John Pitchford

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