Are there any standards or established practices on how to write / represent Right Ascension (RA) and Declination (DEC) values in the sexagesimal format? I have seen all of the following. E.g. for RA:
02 03 04
(assumed to mean 2 hours, 3 hourly minutes and 4 hourly seconds)2 3 4
(same as above)2h 3m 4s
(same as above)2d 3' 6"
(assumed to mean 2 degrees, 3 degree minutes and 4 degree seconds)2d 3m 6s
(same as above)15.33
(assumed to mean 15.33 degrees)9.5H
(assumed to mean 9 hours, 30 hourly minutes and zero hourly seconds)8d 3.5
(assumed to mean 8 degrees, 3 degree minutes and 30 degree seconds)
Likewise for DEC (even though for DEC when the first component does not have a suffix it is assumed by default to be in degrees, not hours). Does any astronomical association publish guidelines for the printing / presentation of such values or on how software should accept user's input of such values?
"format" "right ascension" "standards"
as quoted yields some hits suggesting people are trying to standardize this, but haven't actually done so. $\endgroup$