Tracking


20030712

LOT追蹤精度很高,曝光在 10分鐘以內通常不需 autoguiding,不導星曝光紀錄最長可達 20分鐘。


M51 
2003-07-12 13:41:37 PI 1300B CCD+V filter+LOT(D=1,000mm, f.l.=8,000mm),
Exptime=1200sec, Without Guiding
Star FWHM~1.7arcsec

20030523

 LOT Tracking Test

Date

Time (Interval)

File (StarPosition)

RaTrackErr

DecTrackErr

Image

Remark

20030316

14:47:10

~16:46:48 UT (~120min)

r20030316-070.fit (430.94, 396.40) ~ r20030316-140r.fit (410.88, 399.53)

(20.06x0.62-1)/120

= 0.095 arcsec/min

(3.13 x0.62-1)/120

=0.0078 arcsec/min

(~120min)

20030429


 

11:49:28

~13:42:34 UT (113mins)

20030429-001b.fit (394.43, 432.42)~ 20030429-023r.fit (381.52, 443.95)

(12.91x0.62-1)/113

= 0.062 arcsec/min

(11.53 x0.62-1)/113

=0.054 arcsec/min

(113mins)

20030522

18:34:30

~19:43:13 UT

(~69 min)

kuaoar-014b.fit (533.29, 344.16) ~ kuaoar-017b.fit (534.75, 336.40)

(1.46x0.62-1)/69

~0 arcsec/min

(7.76 x0.62-1.5)/69

=0.055arcsec/min

(~69 min)

20030523

13:48:31

~14:57:19 UT (~69min)

20030523-001v.fit (527.52, 491.71) ~ 20030523-013v.fit (520.25, 500.03)

(7.27x0.62-1)/69

~0.05 arcsec/min

(8.32x0.62-1.5)/69

=0.06arcsec/min

(~69min)

20030523

19:18:24~19:54:51 UT (~36min)

20030523-104v.fit (689.84, 263.84) ~ 20030523-136v.fit (732.11, 287.59)

(42.27x0.62-1)/36

=0.7 arcsec/min

(23.75 x0.62-1)/36

=0.38 arcsec/min

(~36min)