Evidence of Yarkovsky and YORP Migration from the Distribution of Hungaria Family Members

Details Evidence of Yarkovsky and YORP Migration from the Distribution of Hungaria Family Members Evidence of Yarkovsky and YORP Migration from the Distribution of Hungaria Family Members

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.2202w&link_type=abstract

American Astronomical Society, DPS meeting #40, #22.02; Bulletin of the American Astronomical Society, Vol. 40, p.425

Astronomy and Astrophysics

Astronomy

Scientific paper

The Hungaria orbital space is defined by high-inclination, low eccentricity orbits with a semi-major axis (a) of 1.78 < a < 2.0. Using classifications mostly from SDSS colors, we examined the absolute magnitude (H) versus a distribution of S and E(X) type asteroids in this region and found that the S-type distribution is random while the E(X)-type distribution shows a "V” shape distribution, with broader range of a at smaller size (larger H), which is indicative of a collisional family evolved by Yarkovsky spreading. We also found that the E(X)-type distribution is not centered on the current a of its largest member, 434 Hungaria, suggesting that Hungaria itself has evolved outward by Yarkovsky drift from its location at the time of formation of the family, and may allow us to estimate the age of the family. An outward migration is consistent with the prograde rotation determined by shape and pole modeling (Durech 2006, IAU Symposium 236 poster paper). The long rotation period (26 h) suggests that the spin of Hungaria has been substantially altered from its initial state, and still smaller members of the family are probably even more altered. The observing program by Warner and Harris is aimed at determining shapes and pole orientations for as many Hungarias as possible to test the prediction of inward vs. outward Yarkovsky drift.
Funding for Warner and Harris was provided by NASA Planetary Astronomy grant NNG-06GI32G and National Science Foundation grant AST-0607505.

Affiliated with

Also associated with

No associations

Rating

Evidence of Yarkovsky and YORP Migration from the Distribution of Hungaria Family Members does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence of Yarkovsky and YORP Migration from the Distribution of Hungaria Family Members, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence of Yarkovsky and YORP Migration from the Distribution of Hungaria Family Members will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1437497