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Obs-V: C/2006 P1 on 2007 Jan 3.28 UT by H. Dahle.

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  • Bjorn H. Granslo
    ===== Comet C/2006 P1 (McNaught) ===== 2007 Jan. 3.28, 1.5*, 1 .7 (H. Dahle, Fjellhamar, Norway, 9x63 binoculars; 0.2-deg tail; alt. 3.9 deg.; nautical
    Message 1 of 1 , Jan 3, 2007
      ===== Comet C/2006 P1 (McNaught) =====

      2007 Jan. 3.28, 1.5*, 1'.7 (H. Dahle, Fjellhamar, Norway, 9x63
      binoculars; 0.2-deg tail; alt. 3.9 deg.; nautical twilight);

      *** Data in ICQ format ***
      IIIYYYYMnL YYYY MM DD.DD eM/mm.m:r AAA.ATF/xxxx /dd.ddnDC /t.ttmANG ICQ XX*OBSxx
      2006P1 2007 01 3.28 wS 1.5 TK 6.3B 9 1.7 8 0.2 ICQ XX DAH

      *** Remarks ***
      Jan. 3.28: The formal observation (06h43m UT) was made when the comet
      was at true altitude 3.9 deg and with the Sun 9.9 deg below the
      horizon. Once located in binoculars, the comet was fairly easily
      visible to the naked eye as a stellar object with no apparent tail.
      A short, fan-shaped tail was visible through binoculars. The deduced
      m1 magnitude has been corrected for extinction using the "winter"
      extinction table of ICQ, Vol. 14, pp 55-59 (1992). The comparison
      stars were gamma Aql and beta Aql. A couple of 1s exposures, taken
      with a Nikon D70 SLR (300mm f/5.6 lens, ISO 800), gave a good
      impression of the appearance of the comet through binoculars. [DAH]

      Observer: DAH = Haakon Dahle.
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