A ~2.5 Myr ago passage of HD 7977 within 6000-10000 au can reproduce the observed isotropy in new LPC ω and match returning LPCs, implying doubled current flux and halved Oort cloud population.
Science , year = 2010, month = jun, volume =
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A Potential Signature of HD 7977's Passage Among Observed Long-Period Comet Orbits
A ~2.5 Myr ago passage of HD 7977 within 6000-10000 au can reproduce the observed isotropy in new LPC ω and match returning LPCs, implying doubled current flux and halved Oort cloud population.
- Oort Cloud Ecology -- IV. Exchanging Asteroids