About Comet Book
The Comet Book app clearly shows when Comets can be viewed and in which direction. The direction and elevation of a Comet can change noticeably in a day due to its fast apparent motion. The moon and a bright planet may be...
The Comet Book app clearly shows when Comets can be viewed and in which direction. The direction and elevation of a Comet can change noticeably in a day due to its fast apparent motion. The moon and a bright planet may be convenient as a guide to find the comet though they have large apparent motion, too.
This app determines where Comet is in the sky when it becomes visible at your observing site. You can easily start your observation of a Comet by using Comet Book as a guide to the direction and elevation of the comet.
In addition, the new “3D Solar System seen from Space” mode allows you to view the motion of Comets and planets turning around the sun. Please take a look the comet’s movement around our solar system.
Previous Versions
Here you can find the changelog of Comet Book since it was posted on our website on 2017-06-23 02:24:29.
The latest version is 2.7.10 and it was updated on 2026-06-11 01:48:59. See below the changes in each version.
Comet Book version 2.7.10
Updated At: 2026-04-21
Changes: Some bugs have been corrected.
Comet Book version 2.7.8
Updated At: 2025-11-16
Changes: We have updated the app to support comet orbital-element eccentricities up to 10.0.
Comet Book version 2.7.5
Updated At: 2025-08-28
Changes: The positions of buttons and sliders have been adjusted.
Comet Book version 2.7.3
Updated At: 2025-01-07
Changes: A fix has been made to the problem where the perihelion display was off by one month when orbital elements were downloaded from MPC.
Comet Book version 2.7.2
Updated At: 2024-09-02
Changes: A bug that caused the comet's position to shift when the orbital elements of the comet were updated with data from MPC(Minor Planet Center) has been fixed.
Comet Book version 2.7.1
Updated At: 2024-08-06
Changes: The COMET BOOK app now allows you to download comet orbital elements from the Minor Planet Center and select any comet to display.
We fixed an issue where the Comet Book app would crash when launched immediately after updating.
Comet Book version 2.6.1
Updated At: 2023-12-24
Changes: Now compatible with Android 14.
Comet Book version 2.5.6
Updated At: 2022-10-23
Changes: Now compatible with Android 13.
Comet Book version 2.5.4
Updated At: 2021-05-28
Changes: For some models, we have fixed the problem of crashing at startup.
Comet Book version 2.5.3
Updated At: 2020-07-29
Changes: The current local time button has been added to make it easier to find comet in the sky by holding the device over the head when you choose the comet.
For some models, we have fixed the problem of crashing at startup.
Disclaimer
Official Google Play Link
We do not host Comet Book on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Google and passed their terms and conditions to be listed there. We recommend caution when installing it.
The Google Play link for Comet Book is provided to you by apps112.com without any warranties, representations or guarantees of any kind, so access it at your own risk.
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