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Welcome
Mt John Star Tours
Astrophotography
Cowan's Hill Star Tour
Astro Café
Gallery
Employment
Education
Store
What's Up?!
Lake Tekapo
Mount John Observatory
Mount Cook
News
Press Release
About Us
Location map
Links
Feedback
Twitter
Astrocam
Important note
: the following rising and setting times assume a flat horizon. If you have nearby hills or mountains, then the rising and setting times will be later and earlier, respectively. Please use the top row of grey buttons for aurora, Space Station, Iridium flare and planetary moon predictors. Further instructions may be found below.
Sun rises / sets:
Moon rises / sets:
Twilight begins / ends:
Evening planets:
Morning planets:
Moon's age:
Julian Day:
Country:
City:
Date:
Time:
(UT)
Location:
Time Zone:
hour(s) from UT
Local:
Daylight Savings Time?
How to use the Almanac
: the Almanac opens with the current sky conditions over Mt John Observatory in New Zealand, basing the Universal Time (
UT
) and calendar date on your computer's clock. The corresponding local date and time, day of the week, latitude, longitude and time zone are also displayed.
You may select an alternative location from the pull-down
Country
and
City
menus, or enter a new
Date
(yyyy/mm/dd format) and
Time
(UT), then click '
Calc
' to update the Almanac. You may also step forward or backward in time by one hour, day, or week by clicking the appropriate button. Clicking '
Reset
' restores the program to the current date and time.
Crucial note:
only select the
Daylight Savings Time
button if appropriate for your chosen location and season!
.........
Key to the advanced data table below
: The coordinates of right ascension (R.A.) and declination (Dec.) give the object's position on the celestial sphere for the equinox of date. Next are listed the apparent visual magnitude; angular size in arcseconds (arcminutes for the Sun and Moon); percentage of the disk illuminated by sunlight (phase); and, for the specified location, the local times of the object's rising, transiting (appearing highest in the sky), and setting.
R.A.
Dec.
Magnitude
Size
Phase
Rise
Transit
Set
Sun
---
Moon
Mercury
Venus
Mars
Jupiter
Saturn