>From what I understand I already found tree different way to identify an UCAC3 >star :-( We need to clarify this point before to build a search index.
>From the UCAC3 readme 3i) : http://ad.usno.navy.mil/ucac/readme_u3.html 1- the last 4 bytes of the zone files contain the MPOS number. This number spans the range of 3 to 140051297 2- ID = n0 + running star number in zone z "3UCAC100200300". n0 is the largest star ID number of the previous zone. The star ID number runs from 000000001 to 100766420. >From Vizier Note (1): http://cdsarc.u-strasbg.fr/viz-bin/Cat?I/315#sRM3.1 3- 3UC"zzz-nnnnnnn", where zzz is the zone number and nnnnnn a 6-digit running number in the zone. "3UC180-000007" Can someone with better english can clarify the UCAC3 readme 3i). it is quite confuse for me. Also, do anyone know which identifier will be used the most frequently by people using UCAC2 now? by IOTA? for SN chart? Patrick
