Не соображу. В этих фитах указано то время, что прописано в лайтах? Каким образом? Лайты снимались в марте, эти калибровал сегодня.
Открой MaximDL, открой первый фит.
Нажми в меню View / FITS Header Window (или кнопки CTRL+F).
Появится окно с заголовками фита. Это спец. данные снимка, включающие в себя, но не ограничивающиеся:
SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 4656 / length of data axis 1
NAXIS2 = 3520 / length of data axis 2
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
BZERO = 32768 / offset data range to that of unsigned short
BSCALE = 1 / default scaling factor
EXPTIME = 120. / Exposure time (in seconds)
EXPOSURE = 120. / Exposure time (in seconds)
SOFTWARE = 'DeepSkyStacker 3.3.4'
DATE-OBS = '2017-03-26T12:01:13' / YYYY-MM-DDThh:mm:ss observation start, UT
SET-TEMP = -20.000000000000000 / CCD temperature setpoint in C
CCD-TEMP = -20.000000000000000 / CCD temperature at start of exposure in C
XPIXSZ = 3.7999999999999998 / Pixel Width in microns (after binning)
YPIXSZ = 3.7999999999999998 / Pixel Height in microns (after binning)
XBINNING = 1 / Binning factor in width
YBINNING = 1 / Binning factor in height
XORGSUBF = 0 / Subframe X position in binned pixels
YORGSUBF = 0 / Subframe Y position in binned pixels
FILTER = 'Luminance' / Filter used when taking image
IMAGETYP = 'Light Frame' / Type of image
OBJCTRA = '11 20 21' / Nominal Right Ascension of center of image
OBJCTDEC = '+13 34 31' / Nominal Declination of center of image
OBJCTHA = '-11.3541' / Nominal hour angle of center of image
PIERSIDE = 'EAST ' / Side of pier telescope is on
JD = 2457839.0008449075 / Julian Date at start of exposure
JD-HELIO = 2457839.0068852361 / Heliocentric Julian Date at exposure midpoint
TRAKTIME = 1.0000000000000000 / Exposure time used for autoguiding
FOCALLEN = 0.00000000000000000 / Focal length of telescope in mm
APTDIA = 0.00000000000000000 / Aperture diameter of telescope in mm
APTAREA = 0.00000000000000000 / Aperture area of telescope in mm^2
EGAIN = 0.49032235145568848 / Electronic gain in e-/ADU
SWCREATE = 'MaxIm DL Version 5.15' / Name of software that created the image
SBSTDVER = 'SBFITSEXT Version 1.0' / Version of SBFITSEXT standard in effect
OBJECT = ' '
TELESCOP = ' ' / telescope used to acquire this image
INSTRUME = 'ASI Camera (1)'
OBSERVER = ' '
NOTES = ' '
FLIPSTAT = ' '
SWOWNER = 'fff ' / Licensed owner of software
INPUTFMT = 'FITS ' / Format of file from which image was read
Много "мусора", поэтому интересное отметил жирным.
