Comet Book2.7.10
Publisher Description
The 3D view is available for viewing Comets and planets turning around the sun.
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.
About Comet Book
The company that develops Comet Book is 株式会社ビクセン. The latest version released by its developer is 2.7.10. This app was rated by 1 users of our site and has an average rating of 3.0.
To install Comet Book on your Android device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-04-21 and was downloaded 27 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Comet Book as malware as malware if the download link to jp.co.vixen.cometbook is broken.
How to install Comet Book on your Android device:
- Click on the Continue To App button on our website. This will redirect you to Google Play.
- Once the Comet Book is shown in the Google Play listing of your Android device, you can start its download and installation. Tap on the Install button located below the search bar and to the right of the app icon.
- A pop-up window with the permissions required by Comet Book will be shown. Click on Accept to continue the process.
- Comet Book will be downloaded onto your device, displaying a progress. Once the download completes, the installation will start and you'll get a notification after the installation is finished.
Program Details
System requirements
Download information
Pricing
Version History
version 2.7.10
posted on 2026-04-21
Some bugs have been corrected.
version 2.7.8
posted on 2025-11-16
We have updated the app to support comet orbital-element eccentricities up to 10.0.
version 2.7.5
posted on 2025-08-28
The positions of buttons and sliders have been adjusted.
version 2.7.3
posted on 2025-01-07
A fix has been made to the problem where the perihelion display was off by one month when orbital elements were downloaded from MPC.
version 2.7.2
posted on 2024-09-02
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.
version 2.7.1
posted on 2024-08-06
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.
version 2.6.1
posted on 2023-12-24
Now compatible with Android 14.
version 2.5.6
posted on 2022-10-23
Now compatible with Android 13.
version 2.5.4
posted on 2021-05-28
For some models, we have fixed the problem of crashing at startup.
version 2.5.3
posted on 2020-07-29
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.