Comet C/1997 T1 (Utsunomiya)

date (yy/mm/dd)

time
(UT)

exp. time (min/sec)

camera / telescope

film / CCD

filter

image size

Remarks

97/11/18

18:22:15
-
18:47:32

4 x 60 sec
+
5 x 180 sec

C 8 + focal reducer
f / 5.6

Starlight SX

---

8.7' x 10.6'

processing with MIRA A/P:
bias
dark
flat
register
combine (sum)
write TIFF

processing with Photoshop:
pixel rectification
log scaling
unsharp masking
clipping

very bad seeing

97/11/09

20:09:30
-
20:28:35

4 x 60 sec
+
4 x 180 sec

C 8 + focal reducer
f / 5.6

Starlight SX

---

12.5' x 9.8'

processing with MIRA A/P:
bias
dark
flat
register
combine (sum)
write TIFF

processing with Photoshop:
pixel rectification
log scaling
unsharp masking
clipping

97/11/01

20:05:25
-
20:36:33

4 x 60 sec
+
4 x 180 sec

120 mm refractor
f / 5

Starlight SX

---

18' x 19.5'

processing with MIRA A/P:
bias
dark
flat
register
combine (sum)
write TIFF

processing with Photoshop:
pixel rectification
log scaling
unsharp masking
clipping