Special Projects

The Milwaukee Astronomical Society members participate in multiple special observing projects. The Variable Star Project on Z Ursae Majoris (Z UMa) is a good project to learn about variable star observing. Finder charts, commentary, and instruction appear on the links on the left.

Many astronomical observations require that the data be presented with Julian Dates. The following charts will display the Julian Date of the first of each month for this and the coming year.

Add 2,400,000 to get the full Julian Day. So, the full Julian Day for July 1st 2011 is 2455743. The Julian Day is a consecutive day count starting on January 1 of the year -4712 (= 4713 B.C.E.).

Julian Days (JD) for 2013:

Add the day of the month to the number shown. Julian Days begin at Greenwich Noon.

January

55292

July

56473

February

55323

August

56504

March

55351

September

56535

April

56382

October

56565

May

56412

November

56596

June

56443

December

56626

Julian Days (JD) for 2014:

Add the day of the month to the number shown. Julian Days begin at Greenwich Noon.

January

56657

July

56838

February

56688

August

56869

March

56716

September

56900

April

56747

October

56930

May

56777

November

56961

June

56808

December

56991

 

Alternatively, you can go to the AAVSO site for a direct conversion to Julian Date and decimal.