C/1997 T1 (UTSUNOMIYA)


Date (UT)  n MM Mag Ref Aper Type f  x  dia DC taildg tailpa Observer
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971008.82  - S 10.2 AA   25   L  5.6 96 3.5  5 0.05   125    KG Andersson
Comments: Coma somewhat elongated, very distinct cc. Tail 3 arcmin PA 125 deg. In all but apparent 
size, this comet is reminiscent of a well-developed bright comet. Site: Riala, Sweden.


Date (UT)  n MM Mag Ref Aper Type f  x  dia DC taildg tailpa Observer
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971020.78  - S 10.1 AA   25   L  5.6 96 3.5  5 0.08    20    KG Andersson
Comments: Coma elongated into tail, pear-shaped. Tail 5 arcmin PA 20 deg. Seemed somewhat more 
diffuse than Oct 8. Site: Riala, Sweden.


Date (UT)  n MM Mag Ref Aper Type f   x  dia DC taildg tailpa Observer
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971024.94  - S 10.5 HS   45   L  4.4 111  3   5 0.12    70    J Warell
Comments: Rather weak cc. Straight thin faint tail length 7 arcmin PA 70 deg. 
Site: Sandvretens Astronomiska Observatorium, Sweden.


Foto by Jörgen Danielsson 1997 Oct 29, 21:49:25-22:19:38 UT, light yellow filter, field approx 60x60 
arcmin, Starlight Xpress SXL8 cooled -22.5 C. Exposure time 5 x 60 seconds with 200 mm f/4 lens. 
Simulated guiding on comet nucleus.
Foto by Jörgen Danielsson 1997 Oct 29, 21:49:25-22:19:38 UT, light yellow filter, field approx 60x60 
arcmin, Starlight Xpress SXL8 cooled -22.1 C. Exposure time 17 x 60 seconds with 200 mm f/4 lens.
Foto by Jörgen Danielsson 1997 Oct 29, 22:00 UT, light yellow filter, field approx 60x60 arcmin, 
Starlight Xpress SXL8 cooled -22.5 C. Exposure time 5 x 60 seconds with 200 mm f/4 lens.


Date (UT)  n MM Mag Ref Aper Type f   x  dia DC taildg tailpa Observer
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971030.88  - S 10.5 HS   45   L  4.4 111  3  5/ 0.17    70    J Warell
Comments: Tail length 10 arcmin PA 70 deg. Site: Sandvretens Astronomiska Observatorium, Sweden.