C/2002 O4 (Hoenig)
Barycentric
acquisition time :08/03/2002 - 02h17m09s
Exposure time :60s
Telescope :T250 F=944mm + field corrector, sampling 2.83 arcsec/pixel, fow=17x17
arcmin
Filter : None
CCD : Marconi backside illuminated 47-10 1kx1k, 13um per pixel, Chungara Controller
Observer : C.Cavadore
Comment : left negative image, right positive, same date and time.
C/2002 C1 (IKEYA-ZHANG)
Barycentric
acquisition time :14/05/2002 - 01h04m57s
Exposure time :600s (60s x 10)
Telescope :T250 F=944mm + field corrector, sampling 2.83 arcsec/pixel, fow=48x48arcmin
Filter : None
CCD : Marconi backside illuminated 47-10 1kx1k, 13um per pixel, Chungara Controller
Observer : C.Cavadore
Image processing : Gaussian histogram equalization
Comments : Flat field cancellation is not prefect due to overnight telescope
recollimation
C/2000WM1(LINEAR)
Barycentric
acquisition time :14/05/2002 - 02h04m24s
Exposure time :180s (60s+60s+60s)
Telescope :T250 F=944mm + field corrector, sampling 2.83 arcsec/pixel, fow=48x48arcmin
Filter : None
CCD : Marconi backside illuminated 47-10 1kx1k, 13um per pixel, Chungara Controller
Observer : C.Cavadore
Image processing : Gaussian histogram equalization on positive image.
Comments : The 30 arcmin tail is crossing a 4.4 magnitude star (94nu Her),
that its blooming cuts the image in two parts. dist=1.46ua.
Astrometry
:
2002 05 14.07043 17 59 24.66 +30 22 00.6
2002 05 14.07184 17 59 24.45 +30 22 02.6
2002 05 14.07353 17 59 24.20 +30 22 05.2
2002 05 14.07498 17 59 23.99 +30 22 07.4
2002 05 14.07707 17 59 23.68 +30 22 10.4