C/2006P1 (McNaught)


Date (UT)    n MM  Mag  Ref Aper Type f   x   dia DC taildg tailpa Observer
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070113.60    -  I -5.5: AE   8.0  B   -  11    2   8  0.75    60   J Warell

Comments: Very well condensed coma. Very bright disk-shaped cc of homo-
geneous brightness, about 1 arcmin in diameter. Tail seen with naked eye.
The comet's intrinsic color appeared to be brilliant white, but it was
tinted slightly yellowish-reddish by extinction. Comet seen with naked eye
10 min before sunset at an altitude of 4.2 deg. Obs. altitude 2.5 deg,
solar altitude -2.0 deg, very bright twilight. Wispy thin Cirrus, but
clear at comet, -1C, calm. Site: Bjorkby, 5 km N of Uppsala, Sweden
(N59d54'38", E17d35'18").


Date (UT)   n  MM  Mag  Ref Aper Type f  x  dia DC taildg tailpa  Observer
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070113.60   -  I  -4.5:  AE       E      1      9                T. Karhula

Comments:  A yellow, Venus-like, 0'.5 wide central condensation seen with
25x100 binoculars.  Parabolic shaped tail, 0.3 deg long.  I found the
comet 11 minutes before sunset.  Magnitude estimate done when comet was 4°
above horizon and magnitude estimate somewhat conservative.  Could have
been -5 or even -6!  Found before Venus.  McNaught appeared as a "soft"
star naked eye 5°.7 above the sun.  Some cirrus in the sky but otherwise
clear.  Site:  Virsbo, Sweden.


Date (UT)   n  MM  Mag  Ref Aper Type f  x  dia DC taildg tailpa  Observer
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070111.30   -  I  -1.5:  AE       E      1      9   0.8     20   T. Karhula

Comments:  Looked similar as seen 24 hours ago in the morning twilight but
the comet seemed to have dimmed a bit but it was even closer to the sun
and horizon.  Jupiter was behind clouds and I could not compare them
simultaneously.  The yellowish, squashed central condensation seen with
handheld 10x50 binoculars seemed to be double(?).  Parabolic shaped tail.
 Magnitude estimate done when comet at 3° altitude and solar altitude
-4°.  Comet situated in a break in the clouds.  Site:  Västerås, Sweden.


Date (UT)   n  MM  Mag  Ref Aper Type f  x  dia DC taildg tailpa  Observer
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070110.30   -  I  -2.2:  AE       E      1      9   1.0     15   T. Karhula

Comments:  A yellowish, squashed, 0.8' wide central condensation seen with
10x50 binoculars.  Parabolic shaped tail.  I could follow the comet with
the handheld binoculars until 3 minutes after local sunrise.  A daylight
 comet!  Magnitude estimate done when comet at 5° altitude and solar
altitude -4°.  Corrected for differential atmospheric extinction using the
ICQ "average" table.  Comparison object Jupiter, which was slightly higher
up.  Some cirrus in the sky.  Site:  Västerås, Sweden.