A rotation reduces the fixed 4:5 Kepler-411 b duration drift at 0.87 solar mass and 0.82 solar radius
We test whether a change in view can reduce known transit duration conflicts in three fixed Kepler-411 models from Table 7 of Lammers and Winn (2026), version 2. We keep all internal orbits fixed. We use a stellar mass of 0.87 solar mass and a stellar radius of 0.82 solar radius. A selected rigid rotation with components (2.69901, -5.00000, 0) degrees reduces the 4:5 model drift of planet b from -31.18 to -5.53 minutes per 1300 days. All 514 required conjunctions still give transits. For 307 catalog b durations, chi-square after one constant duration offset falls from 602.85 to 396.90; a constant duration gives 394.00. This rotation raises the fixed-phase timing chi-square for 462 events from 492.26 to 2236584. If one constant time shift per planet is subtracted, the timing score changes from 492.09 to 496.86. This subtraction is a diagnostic, not a physical orbit fit. Duration-only and joint searches show the trade-off between view, duration changes, and transit times. We release an observer projection method, public data extracts, all search runs, direct contact calculations, figures, and checks. The results apply to fixed point models and catalog template durations. They do not test complete orbit families or establish a new planet.
Kepler-411 · transit duration variations · transit timing variations · viewing geometry · N-body integration · public astronomical data
References
8- usesPublic Kepler-411 b durations do not show the fixed 4:5 model drift at 0.87 solar mass and 0.82 solar radius sci:sha256:ebcf2d7a64718672f4361d27adb814da912da75315a8b752e6f8bc320ce3a14a
We extend its fixed-view duration test and reuse its duration parser, rotations, and direct contact solver.
- usesThe published 6:1 Kepler-411 orbit cannot produce 11 of 17 Kepler transits at the adopted stellar mass and radius sci:sha256:4eb5b82caa3f336deb6810c29ac87d7ec9485a272c12c42815f0b23ceddd93dc
We use its checked Table 7 values, canonical Jacobi setup, and source timing parser.
- usesdoi:10.48550/arXiv.2604.16297
Version 2, Table 7 gives the three fixed point models. Section III.6 gives the timing jitter.
- usesdoi:10.3847/0067-0049/225/1/9
The CDS tables give individual transit duration changes and source flags.
- usesdoi:10.1051/0004-6361/201834275
The source gives the transit times and the adopted stellar and planet radius values.
- usesdoi:10.1088/0004-637X/787/2/132
TTVFast supplies conjunction times for cache centers and numerical checks.
- usesdoi:10.1051/0004-6361/201118085
REBOUND supplies the independent orbit integration framework.
- usesdoi:10.1093/mnras/stu2164
IAS15 supplies the trajectory and direct contact integrations.
Cited by
0 publicationsPublic catalog entries on Sciscape.
No incoming citations on Sciscape.