1. Asteroid Research projects in the Age of Wide-field Surveys
Brian D. Warner Center for Solar System Studies / MoreData! Inc.
NASA 80NSSC18K0851

2. Coming attractions Taking on the giants What’s needed
Yarkovsky and YORP
asteroid projects
Publish your work

3. Taking on the giants Discovery is out follow-up is in:
Time-sensitive astrometry to avoid losing an asteroid (V > 19)
Astrometry and Photometry to help plan radar observations
Physical characterization

4. What’s Needed You can do it! Telescope and ccd (DSLR) camera
Familiarity with:
Taking images
Image reduction (dark/flats)
Lightcurve period analysis (Basic)
publishing science papers
You can do it!

5. Blame it on YORP and Yarkovsky
YORP (Yarkovsky-O’Keefe-Radzievskii-Paddack

6. Yarkovsky at work

7. Ups and downs of yorp

8. Asteroid research projects

9. H-g curves Absolute Magnitude (H) Phase Slope Parameter (G)
V mag at 1 AU from Sun/Earth, a = 0°
Phase Slope Parameter (G)
Defines curve over a range of phase angles
Accounts for “Opposition Effect”
Rough correlation to taxonomic class

10. Binary asteroids
2000 DP107
Margot et al., 2002

11. Binary asteroids Optical Binary Discovery: Show Me the Lightcurve!
Best Proof: Mutual Events
Stephens and Warner (2016, MPB 43)

12. Finding the Ds/Dp Ratio: 1727 Mette
Binary asteroids
Finding the Ds/Dp Ratio: 1727 Mette
Use shallowest attenuation
Ds/Dp = 𝟏𝟎 𝟎.𝟒∆𝒎 −𝟏.𝟎
Ds/Dp = 𝟏𝟎 𝟎.𝟎𝟏𝟖 −𝟏.𝟎
Ds/Dp = 𝟎.𝟐𝟎±𝟎.𝟎𝟐

13. Family studies Putting it all together
Rotation Statistics
Show frequency distribution
Signs of YORP
Excess of slow rotators
Flat distribution
Compare stats across families

14. Family studies Putting it all together
Spin Axis Statistics
Show distribution
Signs of YORP
Grouping
Favoring poles

15. Rotational statistics

16. The Minor Planet bulletin
Refereed journal (SAO/NASA ADS)
No Page Charges
Open to any author
Author friendly
Vol 46-3: pages, 220+ lightcurves!

17. Asteroid lightcurve data exchange format
Alcdef
Asteroid lightcurve data exchange format
Raw asteroid time-series data
3.5 million observations
32.5 million coming
Standard and simple formats
Open to anyone for upload and download

18. YES! WILL YOUR WORK MAKE A DIFFERENCE?
Minor Planet Mailing List (MPML)
All the Things (not just asteroids) Citizen Scientists can do