C/2004 Q2 (Machholz)


Date(UT)  n MM  Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
----------------------------------------------------------------------------
041210.93 -  B  4.8  TK  5.0  B   -   7   14   6   -      -    T. Karhula
Comments:  First found with Canon 18x50 IS binoculars as a large, fuzzy ball.
A stubby tail pointing northwards suspected.  Altitude 9°.  Site: Virsbo, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
041211.95 -  B  5.5  TK   8   B    -  11   8    5   --     --   J. Warell
Comments: Round coma, brighter center. Limiting magnitude in B 9.0. Altitude 
9 deg, hazy sky, drifting low clouds. Site: Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
041212.89 -  B  4.7  TK  5.0   B   -  18  14    7  0.9    355   T. Karhula
Comments:  A large, fuzzy ball with a faint, stellar (pseudo-)nucleus and a faint
broad tail pointing north.  Position angle approximate.  Site: Virsbo, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
041215.90 -  B  4.5  TK  5.0  B    -   10  16   7  1.4     5    T. Karhula
Comments:  A long, straight gas tail pointed upwards (mistaken as the dust tail
earlier).  Glimpsed for the first time naked eye despite of being right above
the city. Site: Västerås, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
041215.94 -  B  5.1  TK   8   B    -  11  10   6    --     --   J. Warell
Comments: Round coma, well condensed brighter center. Altitude 12 deg,  
transparent sky, 2/8 Sc. Site: Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
041219.98 -  B  5.0  TK   8   B    -   11   9    6   --     --   J. Warell
Comments: Round coma, well condensed brighter center. Coma extended in PA 
approx. 50 deg. Faintly visible with naked eye with averted vision. Altitude 
12 deg, clear transparent sky. ZLM 5.5. Site: Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
041229.84 -  B  4.4  TK   8   B    -   11   15   6  0.25    035  J. Warell
Comments: Round coma with very diffuse faint tail. In 14 cm L x36 a small 
diffuse CC of mag 9.0. Bright sky, waning gibbous Moon 15 degrees above ENE 
horizon. ZLM 4.5. 2/8 Sc, clear at comet. Site: Kalmar, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
041230.86 -  B  3.7  TK   -   E    -   1   30  7   ---     ---  T. Karhula
Comments:  Easily found with naked eye.  Coma diameter approximate.  18x50
binoculars showed a 7.5 magnitude non-stellar nucleus W of the centre and a short,
wide fan of material protruding towards E (the foreshortened dust tail?).
85% gibbous moon up.  Site: Virsbo, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
041231.69 -  B  4.0  TK   -   E    -   1   -    -  ---     ---  J. Warell
041231.70 -  B  3.9  TK   8   B    -  11   30   6  0.5     060  J. Warell
Comments: Very diffuse, extended coma with much brighter, well condensed 
center. Rather faint, straight and diffuse, wide tail extending in PA 060. In 
14 cm L x19 with Lumicon Deep Sky filter the brightest main tail was directed
in approx PA 070, another fainter straight tail in approx PA 215, both at least
1.5 degrees in length. Altitude 25 degrees. Easily visible with naked eye. E 
magnitude estimate made without glasses (observer is near sighted). ZLM 5.5. 
1/8 St, very humid. Site: Kalmar, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
041231.80 -  B  3.6  TK   -   E    -   1   30   7  ---     ---  T. Karhula
Comments:  Coma diameter approximate.  20cm T x64 showed a diffuse coma covering
a large part of the field.  The brightness grew gradually to a stellar nucleus
W of the centre.  A short, wide fan of material faded to the E.  This was only
my third brightest comet seen this year!  Site: Virsbo, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050102.96 -  I  3.9  TK   -   E    -   1   -    -  ---     ---  J. Warell
Comments: ZLM 5.0. Clear weather. Site: Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050103.98 -  B  3.8  TK   -   E    -   1   -    6  ---     ---  J. Warell
Comments: In 11x80 B diam. 30', dc 6, diffuse CC of mag 7.5, one diffuse broad
straight tail in PA 200 with length 0.75 deg, one fainter narrower straight
tail in PA 80 with length 1.5 deg. CCD observation (SXV-H9, 19 min, 10"/pix, 
Baader IR Block filter, lim. mag 14.0) at 21:44 UT gives coma dia 50', dust 
tail PA 197 length 1.3 deg, gas tail PA 072 length >2.2 deg, CC mag 6.4 (VT). 
ZLM 6.5. Clear weather. Site: Sandvretens observatorium, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f   x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050105.72 -  B  3.5  TK   -   E    -   1   40  7   ---     ---  T. Karhula
Comments:  Had a stellar centre as seen with naked eye.  Site: Virsbo, Sweden


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050105.78 -  I  3.9  TK   -   E    -    1   -    -  ---     ---  J. Warell
050105.79 -  B  3.9  TK  2.1  B    -    8   15   6  ---     ---  J. Warell
Comments: Well condensed coma, no tail seen with E or B. In B, coma extended 
in PA 130 deg. In 14 cm f/3.6 L x23 and Lumicon Deep Sky filter with FOV 2.9 
deg, coma dia 20', dc 6, faint diffuse wide tail in PA 185 deg, length 0.75 
deg, coma extended also in PA 85 deg. ZLM 5.0. Clear weather, light polluted 
sky. Site: Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050106.76 -  I  4.0  TK   -   E    -    1   -    -  ---     ---  J. Warell 
Comments: Well condensed coma, no tail seen with E. In 14 cm f/3.6 L x23 and
Lumicon Deep Sky filter with FOV 2.9 deg, coma dia 25', dc 6/, diffuse wide 
dust tail in PA 190 deg length 0.9 deg and faint narrow gas tail in PA 85 deg
length 0.5 deg, CC mag. approx 7.0. A faint fan shaped haze extended from the 
coma in the sector between the tails. ZLM 5.5. Thin Cirrus on W sky but clear 
at comet, light sky. Site: 10 km N of Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type f   x   dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050109.76 -  B  3.6  TK   -   E   -   1    25  7   ---     ---  T. Karhula
Comments: 6x30 finder showed a 1.0° long tail towards PA 160°.  20cm T x64
showed two bright double stars on the E side of the coma.  The dust tail
stretched across the whole field of the view and the E border seemed to be
sharper.  ZLM 6.5.  M33 visible naked eye.  Site: Virsbo, Sweden


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050109.79 -  B  3.7  TK   -   E    -    1   -    -  ---     ---  J. Warell
Comments: Well condensed coma, no tail seen with E. In 11x80 B, coma dia 10', 
dc 6/, coma extended in approx PA 140 deg. ZLM 5.7. Clear, light polluted sky
at comet. Site: Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type f   x   dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050114.86 -  B  3.6  TK   -   E   -   1    35  7   ---     ---  T. Karhula
Comments:  Site: Virsbo, Sweden


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050114.91 -  S  3.7: TK  15   L    5   27   19   5  ---    100   Jan Olsson
Comments:  Very fine clear sky.  Pressure: 1029 hPa.  First found with Minolta
8*40 binoculars as a big "snowball".  Altitude: 54 deg.  Round coma, bright
center.  It was difficult to see the tails.  I saw one of them.  The dust tail
in approx PA 100 deg.  Site: Söderåkra, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050117.87 -  I  3.9  TK   -   E    -    1   -    -  ---     ---  J. Warell
Comments: ZLM 5.0. Light polluted sky, hazy, low drifting Cu. Site: Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050122.72 -  B  4.3  TK   8   B    -   11   20   6   0.5   100   J. Warell
Comments:  Large diffuse extended coma with brighter center. Straight
diffuse tail. Faintly seen with naked eye. Comet near zenith, gibbous Moon
43 deg high in ESE. ZLM 4.3. Clear, light polluted sky. Site: Uppsala,
Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050127.85 -  B  4.4  TK   8   B    -   11   15   6   ---    ---  J. Warell
Comments:  Diffuse coma extended in PA 140 degrees. Gibbous Moon 25 deg high 
in ESE. ZLM 4.3. Clear, light polluted sky. Site: Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050201.19 -  B  4.7  TK   8   B    -   11   17  5/   0.5    90   J. Warell
Comments: Diffuse coma, straight diffuse tail. Waning 3rd qrtr Moon 15 deg high 
in WSW. ZLM 5.0. Low clouds, clear at comet, hazy light polluted sky. Site: 
Uppsala, Sweden.


Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050208.90 -  B  4.9  TK       E         1            ---    ---  J. Warell
050208.91 -  B       TK   8   B    -   11   17  5/   2.5    65   J. Warell
Comments:  In 11x80 B a shorter tail in PA 150 length 0.75 deg. Diffuse fan
shaped area between the two tails. ZLM 6.0. Site: Sandvretens observatorium, 
Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050228.92 -  B  6.1  TK   8   B    -   11   10   6   ---    ---  J. Warell   
Comments: Round, diffuse well condensed coma. No tail seen. ZLM 4.5. Clear. 
Bright sky from snow, moon and streetlights. Site: Uppsala, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050320.88 -  S  7.3  TK   8   B    -   11   10   3   ---    ---  J. Warell   
Comments: Round, very diffuse coma. ZLM 4.5. Cloudy sky, thin Cirrostratus.
Bright sky from snow, moon and streetlights. Site: Uppsala, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
----------------------------------------------------------------------------
050305.88 -  I  5.8  TK       E         1            --     --   T. Karhula
050305.88 -  B  6.0  TK  2.1  B         8   14   5   --     --   T. Karhula
Comments:  Still just visible to the naked eye in good conditions.  8x21
binoculars showed a moderately condensed and slightly elongated coma. Less
than 6° from the north celestial pole. Site: Virsbo, Sweden 



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050321.84 -  S  7.3  TK   8   B    -   11   10   4   ---    ---  J. Warell   
Comments: Round, very diffuse coma with brighter center. ZLM 4.5. Clear sky.
Bright sky from snow, moon and streetlights. Site: Uppsala, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050324.81 -  S  7.1  TK   8   B    -   11   10   4   ---    ---  J. Warell   
Comments: Round, diffuse coma with brighter center. ZLM 5.0. Clear sky.
Bright Moon near full. Site: Rinkabyholm, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050326.79 -  B  7.2  TK   8   B    -   11   12   5   ---    ---  J. Warell   
Comments: Round, diffuse coma with brighter center, extended in PA 180. ZLM 
5.0. Thin Cirrostratus, full Moon rising in SE. Site: Rinkabyholm, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050327.80 -  B  7.1  TK   8   B    -   11   13  5/   0.3    175  J. Warell   
Comments: Round, diffuse coma with well condensed brighter center. Faint,
diffuse straight tail. ZLM 6.0. Clear, dark sky. Site: Rinkabyholm, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050329.90 -  B  7.1  TK   8   B    -   11   11  5/   ---    ---  J. Warell   
Comments: Round, diffuse coma with well condensed brighter center. No tail 
seen. ZLM 5.0. Clear. Site: Uppsala, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050331.04 -  B  7.0  TK   8   B    -   11   13  5/   0.4    245  J. Warell   
Comments: Diffuse coma with well condensed brighter center. Diffuse, wide, 
straight tail. ZLM 6.7. Clear. Site: Sandvretens observatorium, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050403.98 -  B  7.1  TK   8   B    -   11   13  5    0.3    250  J. Warell   
Comments: Diffuse large coma with well condensed brighter center. Diffuse, 
wide, short tail. ZLM 6.4. Clear. Site: Sandvretens observatorium, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050409.91 -  B  8.0  TK   8   B    -   11   7   5    ---    ---  J. Warell   
Comments: Diffuse coma with brighter center. Clear, dark sky. Site: Uppsala, 
Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050412.92 -  B  8.0  TK   8   B    -   11   7   5    ---    ---  J. Warell   
Comments: Diffuse round coma with slightly brighter center. Thin Cirrus, but 
clear at comet. ZLM 5.5. Site: Uppsala, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050413.93 -  B  7.8  TK   8   B    -   11   10  6    0.3    275  J. Warell   
Comments: Diffuse round coma with brighter center. Straight, diffuse faint and
wide tail. Clear. Crescent Moon. ZLM 6.7. Site: Sandvretens observatorium, 
Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050425.92 -  B  8.7  TK  14   S   3.6  17   9   3    ---    ---  J. Warell   
Comments: Very diffuse, round coma with slightly brighter center. Observation
through Lumicon Deep Sky filter. Clear. Full Moon rising. ZLM 5.0. Site: 
Uppsala, Sweden.



Date(UT)  n MM  Mag Ref Aper Type  f    x  dia  DC taildg tailpa Observer
------------------------------------------------------------------------------
050512.95 -  B  9.5: TK  14   S   3.6  17   5   2    ---    ---  J. Warell   
Comments: Very diffuse, round coma with marginally brighter center. Faint. 
Clear weather, twilight. ZLM 5.0. Site: Uppsala, Sweden.