Observer circumstances

Observer location:
Latitude , East longitude
Local date at start of night (yyyy mm dd):
Time zone for output:
Size for finder charts (arcminutes): Width , Height

Target object information

Target ID string for plot title:
Right ascension:
Declination:
Equinox of coördinates:

Criteria for plotted objects

  1. Target object airmass less than 3.0
  2. Standard star airmass less than 3.0
  3. Standard star on same side of meridian as target
  4. Standard star airmass within 0.1 of target object airmass
  5. Sun altitude below -18 degrees
  6. Moon must be either
    • at least degrees away from object, or
    • at least degrees from the object and also less than % lit