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Reports from Geisei Observatory <February 20, 2011>


Observations made with the 60cm reflector and not previously reported (3)

    Continued from the previous report, the following are the observations made by the 60cm reflector. Many of these are likely numbered minor planets and known comets. The photograph below shows a method to discover moving objects by exposing twice on the same frame. It is apparent that the object is clearly in motion and displays cometary features. I remember that, many years ago, a person rushed into my home excited about a "discover" of a comet-like object taking just a single shot. Even if the object looks fuzzy, a single exposure cannot determine its identity. It is an iron rule of comet search that a double exposure or two single shots be made.
     SL591     1999 11 29.48368 22 24 30.93 +04 25 32.9          14.5 T      372
     SL591     1999 11 29.49063 22 24 30.97 +04 25 26.7                      372

     SL592     2001 12 07.45729 03 44 49.79 +17 34 31.9          17.3 V      372
     SL592     2001 12 07.46892 03 44 49.16 +17 34 29.4                      372

     SL593     2000 12 23.76771 12 13 17.29 +00 41 35.1          17.5 V      372
     SL593     2000 12 23.78056 12 13 17.86 +00 41 31.8                      372

     SL594     2001 04 15.66146 15 05 31.79 +01 32 50.1          16.5 V      372
     SL594     2001 04 15.67118 15 05 31.32 +01 32 55.7                      372

     SL595     2001 12 06.51458 03 15 09.99 +14 56 41.2          15.7 V      372
     SL595     2001 12 06.52292 03 15 09.60 +14 56 39.4                      372

     SL596     2001 01 18.57153 08 53 09.97 +20 02 45.8          18.0 V      372
     SL596     2001 01 18.58108 08 53 09.65 +20 02 48.5          17.8 V      372

     SL597     2000 12 23.63889 09 10 24.57 +18 48 50.5          16.5 V      372
     SL597     2000 12 23.65087 09 10 24.17 +18 48 54.9                      372

     SL598     2000 06 06.61389 16 26 22.30 +10 59 54.8          17.4 T      372

     SL599     2001 01 20.65590 10 20 11.36 +15 37 13.8          16.7 V      372
     SL599     2001 01 20.66771 10 20 11.07 +15 37 16.0                      372

     SL600     2001 01 20.67951 10 54 11.00 +10 07 14.8          15.5 V      372
     SL600     2001 01 20.69063 10 54 10.86 +10 07 17.7                      372

    The above are the observations made by Geisei's 60cm reflector. They are bright objects and identified by Mr. Hirohisa Sato to be known objects.

SL591 = C/1999 H1 (Lee)
SL592 = (27662) 1978 UK7
SL593 = (1623) Vivian
SL594 = (3569) Kumon
SL595 = (4157) Izu
SL596 = (13860) Neely
SL597 = (1204) Renzia
SL598 = C/2000 K1 (LINEAR)
SL599 = (21335) 1997 BO3
SL600 = (2222) Lermontov

    The objects reported in February 15, 2011 Report are also identified as follows by Mr. Sato.

SL579 = (54226) 2000 JA10
SL580 = (33717) 1999 LS26
SL581 = (626) Notburga
SL582 = (63991) 2001 SB108
SL583 = (1889) Pakhmutova
SL584 = (6753) Fursenko
SL585 = (1996) Adams
SL586 = 110P/Hartley 3
SL587 = 24P/Schaumasse
SL588 (unidentified; under investigation)
SL589 = (6216) San Jose
SL590 = (2965) Surikov




SL591 = C/1999 H1 (Lee)
Double exposure: 20:33-20:40 and 20:43-20:50, December 29, 1999 (J.S.T.)
60cm f/3.5 reflector with TP6415 film
Image copyright (c) 1999 Geisei Observatory




Copyright (C) 2011 Tsutomu Seki.