AAVSO Observer Code
ONJ
Affiliation
American Association of Variable Star Observers (AAVSO)
Full Name
John O'Neill
Location
Topsfield, MA, US
Background/Interesting Fact
Some observations are done in Rush, Co Dublin, Ireland.
Website URL
http://www.variablestarnights.net
CHOICE Courses Completed
| How to use VPhot | 2015-03-02 |
| DSLR Photometry | 2016-12-09 |
| Variable Star Classification and Light Curves | 2017-03-03 |
| How to use VSTAR | 2017-06-02 |
| Photoelectric Photometry in the 21st Century | 2017-06-02 |
| CCD Photometry, Part I | 2018-03-05 |
| CCD Photometry, Part II | 2018-05-07 |
| Exoplanet Observing | 2018-11-05 |
| Observing and Counting Sunspots | 2021-05-31 |