ngc4490 26032025

SIMPLE = T / file does conform to FITS standard

BITPIX = -32 / number of bits per data pixel

NAXIS = 3 / number of data axes

NAXIS1 = 5262 / length of data axis 1

NAXIS2 = 3517 / length of data axis 2

NAXIS3 = 3 / length of data axis 3

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 = 0. / Offset data range to that of unsigned short

BSCALE = 1. / Default scaling factor

PROGRAM = 'Siril 1.4.0-rc1' / Software that created this HDU

DATE = '2025-11-11T11:25:46' / UTC date that FITS file was created

DATE-OBS= '2025-03-26T23:51:05.434000' / YYYY-MM-DDThh🇲🇲ss observation start,

IMAGETYP= 'LIGHT ' / Type of image

ROWORDER= 'TOP-DOWN' / Order of the rows in image array

EXPTIME = 165. / [s] Exposure time duration

TELESCOP= 'SKYVISION' / Telescope used to acquire this image

FILTER = 'mixed_Starless' / Active filter name

FOCALLEN= 969.709 / [mm] Focal length

XBINNING= 1 / Camera binning mode

YBINNING= 1 / Camera binning mode

XPIXSZ = 3.76 / [um] Pixel X axis size

YPIXSZ = 3.76 / [um] Pixel Y axis size

INSTRUME= 'ATR2600M' / Instrument name

CCD-TEMP= -9.9 / [degC] CCD temperature

SET-TEMP= -10. / [degC] CCD temperature setpoint

GAIN = 100 / Sensor gain

OFFSET = 50 / Sensor gain offset

STACKCNT= 95 / Stack frames

LIVETIME= 17880. / [s] Exposure time after deadtime correction

EXPSTART= 2460761.40590829 / [JD] Exposure start time (standard Julian date)

EXPEND = 2460761.63465973 / [JD]

Done