About the MAS
Membership Information
MAS Observatory
Observing Information
Variable Stars
Special Projects
• Z Uma Project
• EPSILON AUR
Special Events
Astronomy Links
Astronomy Vendors
MAS Personal Sites
MAS Showcase
MAS Archives
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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.
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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 the
next two years.
Add 2,400,000 to get the full Julian Day. So, the full Julian Day for July 1st 2010 is 2455378. The
Julian Day is a consecutive day count starting on Jan 1 of the year -4712 (=
4713 B.C.E.).
| Julian Days (JD) for 2010: |
|---|
Add
the day of the month to the number shown. Julian Days begin at Greenwich
Noon.
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| January |
55196 |
July |
55377 |
| February |
55227 |
August |
55408 |
| March |
55255 |
September |
55439 |
| April |
55286 |
October |
55469 |
| May |
55316 |
November |
55500 |
| June |
55347 |
December |
55530 |
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| Julian Days (JD) for 2011: |
|---|
Add
the day of the month to the number shown. Julian Days begin at Greenwich
Noon.
|
| January |
55561 |
July |
55742 |
| February |
55592 |
August |
55773 |
| March |
55620 |
September |
55804 |
| April |
55651 |
October |
55834 |
| May |
55681 |
November |
55865 |
| June |
55712 |
December |
55895 |
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