Keyword: OBSERVER (String)?
Name of the observer.
|Name:||Pieter G. Welters |
Keyword: COUNTRY (String)?
Country name of observer.
Keyword: AFFILIAT (String)?
Name of your local institute, observatory, association, club, ...
Keyword: URL (String)?
Relevant personal or institutional web site.
Keyword: LOCATION (String)?
A name for the observing site.
|Location name:||Colmschate, Deventer |
Keyword: MPC_CODE (String)?
The code of the observatory as registered with the Minor Planet Center, if applicable.
Keyword: LONGITUD (Float)?
The longitude of the observing site in decimal degrees. East is positive, West is negative.
Keyword: LATITUDE (Float)?
The latitude of the observing site in decimal degrees. North is positive, South is negative.
Keyword: HEIGHT (Float)?
The height of the observatory above mean sea level in meters.
|3. Sky conditions|
Keyword: SKYDESC (String)?
General description of the condition of the sky (e.g. thin cirrus, mist, daylight, twilight, dust, high humidity).
|Sky description:||daylight, thin cirrus |
Keyword: SEEING (String)?
'0' is worst seeing, '10' is excellent seeing (ALPO/Pickering scale).
Keyword: TRANSPAR (String)?
'0' is worst transparency, '5' is perfect transparency.
Keyword: VIS_LM (Float)?
The naked-eye limiting magnitude (indicating the transparency of the sky). The value should only be approximate (e.g. 5.5 or 6.0).
|Limiting magnitude:||0 |
Keyword: WIND (String)?
Description of the wind (e.g. 'no wind', 'telescope unstable due to heavy wind', ... )
Keyword: CLOUDS (String)?
The cloud cover, following the standard convention of giving the percentage of cloud cover in eights. '0/8' means clear sky, '4/8' means 50% clouds.
|Cloud cover:||1/8 |
Keyword: TELESCOP (String)?
Short description of the telescope.
|Telescope name:||Takahashi Mewlon 210 |
Keyword: APER_DIA (Float)?
Diameter of aperture in mm.
|Aperture diameter:||210 mm|
Keyword: F_RATIO (String)?
The focal ratio of the telescope, e.g. f/10.
|Focal ratio:||f/12 |
Keyword: OBSTRUC (Float)?
Percentage of obstructed area (not applicable for refractors).
|Obstructed area:||32 %|
Keyword: EFF_FLEN (Float)?
The effective focal length of the system including all Barlow lenses, eyepiece projections, etc.
|Eff. focal length:||6280 mm|
Keyword: BARLOW (String)?
Make, type, and magnification of a Barlow lens, if used. Else use 'N/A'.
|Barlow:||Melles Griot Fused-Silica Lens f=-100.0 mm, coating HEBBAR UV |
Keyword: EYEPIECE (String)?
If eyepiece projection was used, specify the make, type, and focal length of eyepiece. Else use 'N/A'.
|5. Camera and filter|
Keyword: CAMERA (String)?
Make and name of the camera. If possible, also provide the make and type of the actual CCD chip.
|Camera name:||The Imaging Source DMK 21AU618.AS 640x480 monochrome camera |
Keyword: CAMDEPTH (Integer)?
The dynamic range of the camera expressed in bits per pixel.
|Bit depth:||8 bit|
Keyword: CAMGAIN (String)?
Description of the gain setting of the camera. If the range of the gain is unspecified, then supply a number between 0 (lowest available gain) and 1 (higest available gain). Free text is also allowed (e.g. 'setting C (high)', '20 electrons/DN', ...)
Keyword: FILTER (String)?
If your filter is not in the list, give enough information such that a filter transmission curve can be found. Typically this means: Give the name of the manufacturer, a color band (U, V, B, R…), any potential other names given to filters by the manufacturer. You may also specify a stack of filters.
|Filter:||Astrodon UVenus, www.astrodon.com/products/filters/uvenus_filter/|
Keyword: WVRANGE (String)?
Principal wavelength transmitted by the filter. One of 'ultraviolet', 'visible', 'infrared' or 'mixed'.
|Wavelength range:||ultraviolet |
Keyword: TOTNOFRM (Integer)?
Total number of frames recorded.
|Frames recorded:||1800 |
Keyword: EXPOSURE (Float)?
Exposure time of camera in seconds (per frame).
|Exposure time:||0.08 s|
Keyword: DATE_OBS (Date)?
Start time of the exposure in Universal Time (UT = GMT). Format should be 'YYYY-MM-DDThh:mm:ss' (ISO), for example '2001-01-01T12:34:56'.
|Start time (first frame):||2012-03-25T16:45:24 |
Keyword: DATE_END (Date)?
End time of the exposure in Universal Time (UT = GMT). Format should be 'YYYY-MM-DDThh:mm:ss' (ISO), for example '2001-01-01T12:34:56'.
|End time (last frame):||2012-03-25T16:47:42 |
Keyword: NORTHDIR (String)?
The approximate direction of north in the image. If necessary, specify an angle in degrees counted from the top of the image in clockwise direction
|North direction:||TOP |
Keyword: PRECDIR (String)?
The approximate 'preceeding' direction, i.e. the direction into which Venus is moving due to the earth rotation. This will allow to judge whether the image is mirror-image or not. If necessary, specify an angle in degrees counted from the top of the image in clockwise direction
|Preceeding direction:||RIGHT |
Keyword: PIXELSCL (Float)?
The pixel scale in arcsec per pixel.
|Pixel scale:||0.22 "/px|
|7. Image processing|
Keyword: PROC_SW (String)?
Name and version of the software used for image processing.
|Software:||Registax 6 |
Keyword: N_FRAMES (Integer)?
Number of frames used to obtain the image (only applicable of several frames were stacked – use '1' if no stacking was performed).
|Frames used:||1440 |
Keyword: DARKFLAG (String)?
If dark image was subtracted, set to YES, if not, set to NO.
|Dark field:||NO |
Keyword: FLATFLAG (String)?
If flat field was used, set to YES, if not set to NO.
|Flat field:||NO |
Keyword: HISTORY (String)?
Short description of important image (post-)processing steps that were applied.
Mild histogrm stretch
Keyword: CREDITS (String)?
A (short) text line which should be used when somebody wants to give credit to the image. Example 'D. Koschny (B12), 2007.'
|Credit line:||Pieter Welters, 2012 |
|9. Image info|
Keyword: BITPIX (Integer)?
The number of bits per pixel. This keyword is required by the FITS-standard.
|Bits per pixel:||16 |
Keyword: NAXIS (Integer)?
Number of data axes (2 in the case of a monochrome images). This keyword is required by the FITS-standard.
Keyword: NAXIS1 (Integer)?
The number of pixels of the image in the X direction. This keyword is required by the FITS-standard.
Keyword: NAXIS2 (Integer)?
The number of pixels of the image in the Y direction. This keyword is required by the FITS-standard.
Keyword: STATUS (String)?
Status in the VAA. This keyword is automatically set by the VAA.
Keyword: RECEIVED (Date)?
Date the image was received. This keyword is automatically set by the VAA.
Keyword: UPDATED (Date)?
Last update of the data. This keyword is automatically set by the VAA.
|Last update:||2012-03-25T21:30:23 |