Distant Artificial Satellites Observation (DASO) circular
The Distant Artificial Satellites Observation (DASO) are
a series of circulars designed to disseminate, in a referenceable
fashion, observations of man-made objects that may (or have been)
mistaken for natural objects.
Astrometric observations, in the
standard format should be
submitted via the normal channel.
Designations or names of satellites should begin in column 1 and
extend no further than column 12. The subject of the message should
be "ART SAT" and the message should contain no observations of natural
Circulars and Associated Observation Files
Here are links to recent DASO circulars and their associated observation
batches (the date [in YYYY/MM/DD format] and time [in HH:MM format] in
parentheses on each line indicates when that circular was issued):
Older circulars are available here.
Combined Observation File
The file containing all astrometry published in the DASO
is available here.