Sunspot groups data format 1-4 Year 6-7 Month 9-10 Day 12-18 The extended number of the group in format YYYYNNN, where YYYY is the year of the catalogue volume, NNN is the number of spot in the volume. 20-24 Heliographic longitude 26-30 Latitude 32-36 Second heliographic longitude (999.9=no data) 38-42 Second latitude (999.9=no data) 44-47 The group area, in millionths of solar hemisphere (9999=no data) 49-52 The area of the largest spot (9999=no data) 54-56 Number of spots in the group (999=no data)