Comet Book2.7.4
Publisher Description
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.
We have updated the app to support comet orbital-element eccentricities up to 10.0.
About Comet Book
The company that develops Comet Book is Vixen Co., Ltd.. The latest version released by its developer is 2.7.4.
To install Comet Book on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2025-11-18 and was downloaded 8 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 if the download link is broken.
How to install Comet Book on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the Comet Book is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After Comet Book is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
Program Details
System requirements
Download information
Pricing
Version History
version 2.7.4
posted on 2025-11-18
We have updated the app to support comet orbital-element eccentricities up to 10.0.
version 2.7.2
posted on 2025-09-20
Sep 20, 2025
Version 2.7.2
Some bugs have been corrected.
version 2.7.1
posted on 2024-08-31
Aug 31, 2024
Version 2.7.1
Addressed an issue where the comet list was not being saved.
version 2.7
posted on 2024-08-07
Aug 7, 2024
Version 2.7
The COMET BOOK app now allows you to download comet orbital elements from the Minor Planet Center and select any comet to display.
version 2.6.1
posted on 2024-04-05
Apr 5, 2024
Version 2.6.1
We have fixed an issue that was occurring on some devices.
version 2.6
posted on 2023-10-03
Oct 3, 2023
Version 2.6
Some bugs have been corrected.
version 2.5.3
posted on 2022-07-05
Jul 5, 2022
Version 2.5.3
Expanded the variable range of dates.