onj

AAVSO Observer Code
ONJ
Affiliation
None
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