https://news.mb.com.ph/2017/04/05/astro … -planet-9/

Australian National University (ANU) releases data from their 14-square-foot SkyMapper telescope at the Siding Spring Observatory to the public, and 60,000 citizen scientists have examined the data to hunt for planets. SkyMapper was trained on the outskirts of the universe: the Trans-Neptunian Objects (TNOs), which lie beyond Neptune and include Pluto, the Kuiper Belt and the Oort Cloud.

“We’ve managed to rule out a planet about the size of Neptune being in about 90 percent of the southern sky out to a depth of about 350 times the distance the Earth is from the sun,” lead researcher and ANU astrophysicist Brad Tucker said in a statement.

“With the help of tens of thousands of dedicated volunteers sifting through hundreds of thousands of images taken by SkyMapper, we have achieved four years of scientific analysis in under three days.”

“It’s actually not that complicated to find Planet Nine. It really is spot the difference. Then you just click on the image, mark what is different and we’ll take care of the rest,” he said. The four objects found by the citizen astronomers are still under study, and little is known about them.

http://astro.tsinghua.edu.cn/~xbai/teac … Mapper.pdf

3.1, What Is the Distribution of Solar System Objects
Beyond Neptune?
---- quiescent comet-like objects
---- Trans-Neptunian Object (TNO)
Two epochs ~4 hours on the first night
A third epoch 1-3 days later
A fourth epoch after 1 month

http://www.astro.lu.se/~louise/Louise_SFA.pdf

Searching for Trans-Neptunian Objects
• Predicted to find around 2000 TNOs across the sky.

http://skymapper.anu.edu.au/surveys/

Progress survey