Emerald Observatory for iPad1.6.1

Emerald Observatory displays a wealth of astronomical information all on one screen, in a unique but understandable format. Information includes:

- 12- and 24-hour ordinary clock time
- Times of rise and set for the Sun, the Moon, and the 5 classical planets
- Times of the beginning and ending of twilight
- Heliocentric orrery (display of the planets in orbit around the Sun)
- Altitude and azimuth for the same bodies (one body at a time)
- Current phase and apparent orientation and relative size of the moon
- Current regions of day and night on a world map
- The Equation of Time, solar time, UTC time, and sidereal time
- Month, day, year, and leap-year indicator
- Daily alarm (delivered as local notification on iOS 4+ if app is not running)
- Eclipse simulator
- Displayed times are synchronized via NTP to "atomic clock" standard
- Uses iPad location, or the latitude and longitude may be set manually

A setting is available to allow the display to stay on continuously.

Tap on the display to move forward by a month, day, year, hour, or minute. A detailed manual for the operation of Emerald Observatory can be found at the "Emerald Sequoia LLC Web Site" listed below, at http://emeraldsequoia.com/eo/

If you are having any trouble with the application whatsoever, please see our FAQ on the support page listed below and then contact us through that page if your problem is not resolved. We take pride in responding promptly to all support email requests but we can't fix it if you don't report it (and we have no way to respond to Customer Reviews on iTunes).

(NTP requires Internet access. Like all apps Emerald Observatory can not change the device's internal clock.)

Version History Fixes some small visual bugs (colors, screen size). 1.6.1 Sep 19 Returned to the App Store under a new caretaker. 1.6 Sep 16 Startup warning about Emerald Sequoia shutdown. 1.5.5 09/03/2023 Support for iOS 15 1.5.4 11/05/2021 Fix initial Moon rotation. 1.4.6 05/30/2021 Support for dark mode 1.4.5 05/27/2021 Support for iOS 14 1.4.4 02/15/2021 Bug fixes 1.4.3 05/02/2018 Bug fixes 1.4.2 12/11/2017 - Support for iOS 10 1.4.1 11/30/2016 iOS 7 support 1.4 10/25/2013 Fix alarm when restarting app 1.3.8 09/25/2012 * new NTP implementation with smaller impact on pool servers
* Earth map terminator edge now has discrete steps to match twilight markers on main 24-hour ring
* minor aesthetic tweaks 1.3.7 09/13/2012 minor bug fix 1.3.6 04/20/2012 Enhancements for Retina iPad and other minor aesthetic improvements. 1.3.5 03/15/2012 - fix alarm on autumn summer-time transition days
- different subdial tick marks for better readability
- EOT hand now moves continuously instead of once per day
- Earth map daylight region border refinement 1.3.4 01/07/2012 - correct Moon orientation
- sidereal subdial now marked with constellation names 1.3.3 09/13/2011 - Longer Local Notification sound for when alarm goes off in the background
- Support Cyrillic region formats
- More precise hand drawing for 24-hour hand and others
- Better behavior when iPad timezone changes
- Minor bugfixes
- Require iOS 4.3 to avoid local notification sound that can't be shut off 1.3.2 08/13/2011 minor bug fixes and aesthetic improvements
improved startup animation 1.3.1 01/20/2011 - Solar and lunar eclipse simulator
- iOS 4.2 support
- Alarm notification now given in iOS 4+ if app not running 1.3 12/16/2010 transit time markers on the rise/set rings
extended EOT dial to +/- 17 minutes 1.2.5 10/21/2010 Chinese localization 1.2.3 10/06/2010 * Fixed bug setting the alarm to a time in the very near future when the NTP offset is negative

* Fixed several other minor bugs 1.2.2 08/16/2010 two small bug fixes 1.2.1 08/03/2010 - Daily Alarm
- Solar noon indication
- Rotate the Moon to match the sky
- Noon on top option
- Option to stay on only when plugged in
- Italian, Spanish and Dutch localization 1.2 07/29/2010