C/2002 T7 (LINEAR)


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040527.52  -  -    -   -   5.0  B   -   18  10   6  1.3    130   T Karhula
040527.51  -  G   4.2  TK   -   E   -   1    -   -   -      -    T Karhula
Comments:  Tail straight, faint and became broader at the end. LINEAR
still not difficult to see naked eye.  First quarter moon interfered but very
transparent sky. Site: Geraldton, Western Australia.


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040526.54  -  G   4.1  TK   -   E   -   1    -   -   -      -    T Karhula
040526.53  -  -    -   -   5.0  B   -   18  10   7  1.7    130   T Karhula
Comments: LINEAR was noticeably fainter than yesterday probably due to 
moonlight. Tail straight and quite faint. Site: Geraldton, Western Australia.


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040525.45  -  G   3.5  TK   -   E   -   1    -   -   -      -    T Karhula
040525.45  -  -    -   -   5.0  B   -   18  11   7  2.1    120   T Karhula
Comments:  Tail straight and quite faint.  LINEAR situated only 2.5 deg S
of M46 and 3.2 deg from M47 and visible in the same field of view. 
Site: Geraldton, Western Australia.


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040520.44  -  G   3.0  TK   -   E   -   1    -   -   -      -    T Karhula
040520.44  -  -    -   -   5.0  B   -   18  14   7  3.0    150   T Karhula
Comments: This was the first time that I saw two naked eye comets simultaneously!
LINEAR was more prominent than NEAT and it was the first time I saw LINEAR as
an evening object from the southern hemisphere.  It had a tail with a low
surface brightness and their tails pointed in different directions.
Astronomical twilight. Site: Geraldton, Western Australia.


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040513.90  -  -    -   -   5.0  B   -   18  12   7  7.1    225   T Karhula
040513.88  -  G   3.4  TK   -   E   -   1    -   -   -      -    T Karhula
Comments:  LINEAR made a nice triangle with zeta Cet and chi Cet.  The coma
had a bluish color. The tail was unusually long, straight and thin and
looked like a faint light beam from a car's headlight.  I could glimpse the
beginning of the tail naked eye and I could follow LINEAR without optical
aid until solar altitude -8.8 deg. Very transparent sky. Site: Geraldton,
Western Australia.


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040512.91  -  G   3.2  TK   -   E   -   1    -   -   -      -    T Karhula
040512.91  -  -    -   -   5.0  B   -   18  11   7  2.7    240   T Karhula
Comments:  It showed a long and straight tail in the twilight.
Site: Geraldton, Western Australia.


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040511.92  -  -    -   -   5.0  B   -   18  11   6\ 4.3    235   T Karhula
040511.90  -  G   3.4  TK   -   E   -   1    -   -   -      -    T Karhula
Comments:  This was the first time that I saw two naked eye comets during
the same night! First found with naked eyes between eta Cet and theta Cet 
as a fuzzy star not plotted in Uranometria.  LINEAR sported a long, straight
tail and was broader towards the end as seen with 18x50 Image Stabilizer
binoculars. The tail length estimate is conservative and was certainly longer.  
Tail visible also with 8x20B in the twilight. Bluish coma. 3rd quarter moon
and twilight interfered. I could follow the comet until solar altitude -7.7
deg. Site: Geraldton, Western Australia.


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040503.21  -  B 3.9  TK  2.5   B  -   8    10 6/   0.7    250  J Warell
Comments: Well condensed, round and diffuse coma. Bright sky due to nearly 
full Moon. Easily visible with naked eye. Alt. 7 degrees. Site: Observatorio 
del Roque de los Muchachos, La Palma, Spain, alt. 2400 m.


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040504.23  -  B 4.0  TK  2.5   B  -   8    -   6  ---    ---   J Warell
Comments: Well condensed, round and diffuse coma. No cc seen in 10 cm f/10 T 
x100. No tail seen. Bright sky due to full Moon, twilight. Visible with naked 
eye. Alt. 10 degrees. Site: Observatorio del Roque de los Muchachos, La Palma, 
Spain, alt. 2400 m.


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040221.79  -  B 6.9  TT  5.0   B  -   7    9   6   0.3    50   T. Karhula
Comments:  The plasma tail was short and straight and the coma have been
getting more condensed.  Site: Virsbo, Sweden.



Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040125.73  -  S 7.0  TT  5.0   B  -   7   10   3  ---    ---   T Karhula
Comments:  Comet also seen with 8x21 binoculars.  It was still not
particularly easy due to light from the nearby crescent moon and ice
crystals in the air.  DC=6 as seen with 18x50 IS binoculars. Temperature
-15 C.  Site: Virsbo, Sweden


Date (UT)  n MM Mag Ref Aper Type f   x   dia DC taildg tailpa Observer
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040119.16  -  B 8.2  TK  8.0   B  -  11    5   5  ---    ---   J Warell
Comments: Well condensed, round and diffuse coma with brighter center. No 
tail visible. In 25 cm f/10 T x110 coma was well condensed DC 7, 2' dia with 
a pseudostellar CC of approx 10-11 mag, and a 20 arcmin long straight diffuse 
tail in PA 65 deg, coma was extended towards the tail. ZLM 6.5. Site: Saguaro 
National Park, west of Tucson, AZ.


Date(UT)  n MM  Mag Ref Aper Type  f    x   dia DC taildg tailpa Observer
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040117.75 -  S  7.9  TT  5.0   B   -    7   10   4   -      -    T Karhula
Comments:  First clear night this year.  Site: Virsbo, Sweden.