Destruction of “peas in a pod?”: A candidate multi-planet system around the nearby bright star HD 208487

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Volume 702 (October 2025)

A&A, 702 (2025) A139

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Table 3

Comparison of the best WNO models (with 1σ errors) for different data set aggregations.

Parameter	TERRA+TERRA2	No AAT	AAT+TERRA	PFS+TERRA2	AAT only	ALL
P (days)	${129.33}_{- 0.04}^{+ 0.04}$ $129.33^{+0.04}_{-0.04}$	${129.32}_{- 0.01}^{+ 0.03}$ $129.32^{+0.03}_{-0.01}$	${129.39}_{- 0.22}^{+ 0.15}$ $129.39^{+0.15}_{-0.22}$	${129.34}_{- 0.03}^{+ 0.01}$ $129.34^{+0.01}_{-0.03}$	${129.27}_{- 0.14}^{+ 0.23}$ $129.27^{+0.23}_{-0.14}$	${129.36}_{- 0.02}^{+ 0.02}$ $129.36^{+0.02}_{-0.02}$
K (m/s)	${18.38}_{- 0.23}^{+ 0.08}$ $18.38^{+0.08}_{-0.23}$	${18.76}_{- 0.35}^{+ 0.27}$ $18.76^{+0.27}_{-0.35}$	${17.35}_{- 1.22}^{+ 0.95}$ $17.35^{+0.95}_{-1.22}$	${18.53}_{- 0.17}^{+ 0.10}$ $18.53^{+0.10}_{-0.17}$	${16.70}_{- 0.02}^{+ 0.95}$ $16.70^{+0.95}_{-0.02}$	${18.28}_{- 0.40}^{+ 0.29}$ $18.28^{+0.29}_{-0.40}$
e	${0.36}_{- 0.02}^{+ 0.01}$ $0.36^{+0.01}_{-0.02}$	${0.35}_{- 0.01}^{+ 0.01}$ $0.35^{+0.01}_{-0.01}$	${0.18}_{- 0.06}^{+ 0.04}$ $0.18^{+0.04}_{-0.06}$	${0.35}_{- 0.01}^{+ 0.00}$ $0.35^{+0.00}_{-0.01}$	${0.13}_{- 0.02}^{+ 0.03}$ $0.13^{+0.03}_{-0.02}$	${0.37}_{- 0.01}^{+ 0.01}$ $0.37^{+0.01}_{-0.01}$
ω (rad)	${1.21}_{- 0.01}^{+ 0.03}$ $1.21^{+0.03}_{-0.01}$	${1.21}_{- 0.03}^{+ 0.01}$ $1.21^{+0.01}_{-0.03}$	${1.41}_{- 0.35}^{+ 0.55}$ $1.41^{+0.55}_{-0.35}$	${1.16}_{- 0.04}^{+ 0.06}$ $1.16^{+0.06}_{-0.04}$	${2.58}_{- 0.65}^{+ 0.48}$ $2.58^{+0.48}_{-0.65}$	${1.10}_{- 0.01}^{+ 0.01}$ $1.10^{+0.01}_{-0.01}$
M₀ (rad)	${3.43}_{- 0.10}^{+ 0.08}$ $3.43^{+0.08}_{-0.10}$	${3.40}_{- 0.01}^{+ 0.07}$ $3.40^{+0.07}_{-0.01}$	${1.83}_{- 0.68}^{+ 0.38}$ $1.83^{+0.38}_{-0.68}$	${3.23}_{- 0.05}^{+ 0.04}$ $3.23^{+0.04}_{-0.05}$	${0.58}_{- 0.49}^{+ 0.78}$ $0.58^{+0.78}_{-0.49}$	${1.95}_{- 0.04}^{+ 0.05}$ $1.95^{+0.05}_{-0.04}$
m sin i (M_J)	${0.47}_{- 0.01}^{+ 0.01}$ $0.47^{+0.01}_{-0.01}$	${0.48}_{- 0.01}^{+ 0.01}$ $0.48^{+0.01}_{-0.01}$	${0.47}_{- 0.03}^{+ 0.03}$ $0.47^{+0.03}_{-0.03}$	${0.47}_{- 0.01}^{+ 0.01}$ $0.47^{+0.01}_{-0.01}$	${0.45}_{- 0.00}^{+ 0.03}$ $0.45^{+0.03}_{-0.00}$	${0.46}_{- 0.00}^{+ 0.01}$ $0.46^{+0.01}_{-0.00}$
AU1	${0.52}_{- 0.00}^{+ 0.00}$ $0.52^{+0.00}_{-0.00}$	${0.52}_{- 0.00}^{+ 0.00}$ $0.52^{+0.00}_{-0.00}$	${0.53}_{- 0.00}^{+ 0.00}$ $0.53^{+0.00}_{-0.00}$	${0.53}_{- 0.00}^{+ 0.00}$ $0.53^{+0.00}_{-0.00}$	${0.52}_{- 0.00}^{+ 0.00}$ $0.52^{+0.00}_{-0.00}$	${0.53}_{- 0.00}^{+ 0.00}$ $0.53^{+0.00}_{-0.00}$
P₂ (days)	${490.82}_{- 0.31}^{+ 5.62}$ $490.82^{+5.62}_{-0.31}$	${488.10}_{- 1.54}^{+ 0.89}$ $488.10^{+0.89}_{-1.54}$	${934.56}_{- 42.29}^{+ 17.97}$ $934.56^{+17.97}_{-42.29}$	${485.60}_{- 6.68}^{+ 4.71}$ $485.60^{+4.71}_{-6.68}$	${923.92}_{- 19.30}^{+ 26.38}$ $923.92^{+26.38}_{-19.30}$	${923.06}_{- 2.76}^{+ 2.02}$ $923.06^{+2.02}_{-2.76}$
K₂ (m/s)	${3.73}_{- 0.01}^{+ 0.27}$ $3.73^{+0.27}_{-0.01}$	${4.35}_{- 0.46}^{+ 0.33}$ $4.35^{+0.33}_{-0.46}$	${9.76}_{- 1.98}^{+ 1.26}$ $9.76^{+1.26}_{-1.98}$	${4.03}_{- 0.09}^{+ 0.17}$ $4.03^{+0.17}_{-0.09}$	${8.69}_{- 0.21}^{+ 1.13}$ $8.69^{+1.13}_{-0.21}$	${6.18}_{- 0.07}^{+ 0.09}$ $6.18^{+0.09}_{-0.07}$
e₂	${0.17}_{- 0.06}^{+ 0.02}$ $0.17^{+0.02}_{-0.06}$	${0.30}_{- 0.10}^{+ 0.06}$ $0.30^{+0.06}_{-0.10}$	${0.17}_{- 0.12}^{+ 0.06}$ $0.17^{+0.06}_{-0.12}$	${0.22}_{- 0.04}^{+ 0.01}$ $0.22^{+0.01}_{-0.04}$	${0.08}_{- 0.03}^{+ 0.03}$ $0.08^{+0.03}_{-0.03}$	${0.19}_{- 0.02}^{+ 0.01}$ $0.19^{+0.01}_{-0.02}$
ω₂ (rad)	${4.55}_{- 0.40}^{+ 0.01}$ $4.55^{+0.01}_{-0.40}$	${4.72}_{- 0.48}^{+ 0.33}$ $4.72^{+0.33}_{-0.48}$	${3.89}_{- 0.04}^{+ 1.20}$ $3.89^{+1.20}_{-0.04}$	${4.00}_{- 0.17}^{+ 0.14}$ $4.00^{+0.14}_{-0.17}$	${2.94}_{- 1.10}^{+ 1.46}$ $2.94^{+1.46}_{-1.10}$	${5.96}_{- 5.96}^{+ 0.30}$ $5.96^{+0.30}_{-5.96}$
M₀₂ (rad)	${0.74}_{- 0.98}^{+ 0.90}$ $0.74^{+0.90}_{-0.98}$	${0.41}_{- 0.14}^{+ 0.19}$ $0.41^{+0.19}_{-0.14}$	${3.61}_{- 1.70}^{+ 1.34}$ $3.61^{+1.34}_{-1.70}$	${2.39}_{- 0.32}^{+ 0.00}$ $2.39^{+0.00}_{-0.32}$	${3.96}_{- 1.07}^{+ 0.00}$ $3.96^{+0.00}_{-1.07}$	${1.29}_{- 0.29}^{+ 0.52}$ $1.29^{+0.52}_{-0.29}$
m₂ sin i (M_J)	${0.16}_{- 0.01}^{+ 0.01}$ $0.16^{+0.01}_{-0.01}$	${0.18}_{- 0.01}^{+ 0.01}$ $0.18^{+0.01}_{-0.01}$	${0.51}_{- 0.07}^{+ 0.07}$ $0.51^{+0.07}_{-0.07}$	${0.17}_{- 0.01}^{+ 0.01}$ $0.17^{+0.01}_{-0.01}$	${0.46}_{- 0.01}^{+ 0.06}$ $0.46^{+0.06}_{-0.01}$	${0.32}_{- 0.01}^{+ 0.01}$ $0.32^{+0.01}_{-0.01}$
AU2	${1.28}_{- 0.01}^{+ 0.01}$ $1.28^{+0.01}_{-0.01}$	${1.27}_{- 0.01}^{+ 0.01}$ $1.27^{+0.01}_{-0.01}$	${1.96}_{- 0.03}^{+ 0.03}$ $1.96^{+0.03}_{-0.03}$	${1.27}_{- 0.01}^{+ 0.01}$ $1.27^{+0.01}_{-0.01}$	${1.95}_{- 0.03}^{+ 0.04}$ $1.95^{+0.04}_{-0.03}$	${1.94}_{- 0.01}^{+ 0.01}$ $1.94^{+0.01}_{-0.01}$
P₃ (days)	${959.17}_{- 194.63}^{+ 419.38}$ $959.17^{+419.38}_{-194.63}$	${941.38}_{- 18.51}^{+ 28.27}$ $941.38^{+28.27}_{-18.51}$	${1294.65}_{- 38.62}^{+ 1191.79}$ $1294.65^{+1191.79}_{-38.62}$	${979.74}_{- 36.32}^{+ 33.79}$ $979.74^{+33.79}_{-36.32}$	${186.57}_{- 186.57}^{+ 1125.53}$ $186.57^{+1125.53}_{-186.57}$	${1380.13}_{- 8.25}^{+ 19.20}$ $1380.13^{+19.20}_{-8.25}$
K₃ (m/s)	${3.16}_{- 0.94}^{+ 1.01}$ $3.16^{+1.01}_{-0.94}$	${3.54}_{- 0.50}^{+ 0.36}$ $3.54^{+0.36}_{-0.50}$	${5.61}_{- 3.77}^{+ 1.63}$ $5.61^{+1.63}_{-3.77}$	${3.09}_{- 0.37}^{+ 0.42}$ $3.09^{+0.42}_{-0.37}$	${4.35}_{- 1.57}^{+ 0.07}$ $4.35^{+0.07}_{-1.57}$	${2.46}_{- 0.09}^{+ 0.30}$ $2.46^{+0.30}_{-0.09}$
e₃	${0.03}_{- 0.05}^{+ 0.06}$ $0.03^{+0.06}_{-0.05}$	${0.22}_{- 0.17}^{+ 0.08}$ $0.22^{+0.08}_{-0.17}$	${0.06}_{- 0.02}^{+ 0.03}$ $0.06^{+0.03}_{-0.02}$	${0.07}_{- 0.03}^{+ 0.04}$ $0.07^{+0.04}_{-0.03}$	${0.01}_{- 0.01}^{+ 0.08}$ $0.01^{+0.08}_{-0.01}$	${0.11}_{- 0.06}^{+ 0.03}$ $0.11^{+0.03}_{-0.06}$
ω₃ (rad)	${1.08}_{- 1.69}^{+ 2.25}$ $1.08^{+2.25}_{-1.69}$	${0.57}_{- 1.65}^{+ 2.24}$ $0.57^{+2.24}_{-1.65}$	${2.80}_{- 0.65}^{+ 1.49}$ $2.80^{+1.49}_{-0.65}$	${3.34}_{- 1.12}^{+ 0.12}$ $3.34^{+0.12}_{-1.12}$	${4.91}_{- 3.09}^{+ 1.86}$ $4.91^{+1.86}_{-3.09}$	${0.29}_{- 0.09}^{+ 0.28}$ $0.29^{+0.28}_{-0.09}$
M₀₃ (rad)	${3.30}_{- 1.37}^{+ 0.80}$ $3.30^{+0.80}_{-1.37}$	${3.27}_{- 0.82}^{+ 0.37}$ $3.27^{+0.37}_{-0.82}$	${5.47}_{- 3.32}^{+ 1.85}$ $5.47^{+1.85}_{-3.32}$	${5.67}_{- 4.10}^{+ 2.17}$ $5.67^{+2.17}_{-4.10}$	${3.79}_{- 2.08}^{+ 0.37}$ $3.79^{+0.37}_{-2.08}$	${2.61}_{- 0.42}^{+ 0.47}$ $2.61^{+0.47}_{-0.42}$
m₃ sin i (M_J)	${0.168}_{- 0.07}^{+ 0.07}$ $0.168^{+0.07}_{-0.07}$	${0.18}_{- 0.02}^{+ 0.02}$ $0.18^{+0.02}_{-0.02}$	${0.33}_{- 0.10}^{+ 0.10}$ $0.33^{+0.10}_{-0.10}$	${0.16}_{- 0.02}^{+ 0.02}$ $0.16^{+0.02}_{-0.02}$	${1.34}_{- 0.10}^{+ 0.11}$ $1.34^{+0.11}_{-0.10}$	${0.15}_{- 0.02}^{+ 0.01}$ $0.15^{+0.01}_{-0.02}$
AU3	${1.995}_{- 0.25}^{+ 0.25}$ $1.995^{+0.25}_{-0.25}$	${1.97}_{- 0.03}^{+ 0.03}$ $1.97^{+0.03}_{-0.03}$	${2.436}_{- 1.52}^{+ 1.52}$ $2.436^{+1.52}_{-1.52}$	${2.00}_{- 0.05}^{+ 0.05}$ $2.00^{+0.05}_{-0.05}$	${0.67}_{- 0.67}^{+ 1.78}$ $0.67^{+1.78}_{-0.67}$	${2.54}_{- 0.01}^{+ 0.02}$ $2.54^{+0.02}_{-0.01}$
γ_UCLES (m/s)	–	–	${18.06}_{- 1.83}^{+ 2.71}$ $18.06^{+2.71}_{-1.83}$	–	${21.28}_{- 1.53}^{+ 0.06}$ $21.28^{+0.06}_{-1.53}$	${1.78}_{- 0.94}^{+ 0.37}$ $1.78^{+0.37}_{-0.94}$
γ_TERRA1 (m/s)	${1.18}_{- 0.19}^{+ 2.07}$ $1.18^{+2.07}_{-0.19}$	${1.87}_{- 0.16}^{+ 0.69}$ $1.87^{+0.69}_{-0.16}$	${31.28}_{- 0.21}^{+ 1.79}$ $31.28^{+1.79}_{-0.21}$	–	–	${12.10}_{- 0.76}^{+ 0.41}$ $12.10^{+0.41}_{-0.76}$
γ_TERRA2 (m/s)	$- {18.20}_{- 15.94}^{+ 28.31}$ $-18.20^{+28.31}_{-15.94}$	$- {14.78}_{- 2.50}^{+ 2.93}$ $-14.78^{+2.93}_{-2.50}$	–	${3.91}_{- 0.91}^{+ 0.20}$ $3.91^{+0.20}_{-0.91}$	–	$- {8.373}_{- 1.99}^{+ 0.74}$ $-8.373^{+0.74}_{-1.99}$
γ_PFS (m/s)	–	$- {15.86}_{- 2.49}^{+ 3.25}$ $-15.86^{+3.25}_{-2.49}$	–	${3.18}_{- 0.88}^{+ 0.30}$ $3.18^{+0.30}_{-0.88}$	–	$- {8.65}_{- 2.41}^{+ 0.70}$ $-8.65^{+0.70}_{-2.41}$
γ˙ (m/s yr)	${0.00}_{- 0.01}^{+ 0.00}$ $0.00^{+0.00}_{-0.01}$	${0.00}_{- 0.00}^{+ 0.00}$ $0.00^{+0.00}_{-0.00}$	${0.00}_{- 0.00}^{+ 0.00}$ $0.00^{+0.00}_{-0.00}$	$- {0.00}_{- 0.00}^{+ 0.00}$ $-0.00^{+0.00}_{-0.00}$	$- {0.00}_{- 0.00}^{+ 0.00}$ $-0.00^{+0.00}_{-0.00}$	${0.00}_{- 0.00}^{+ 0.00}$ $0.00^{+0.00}_{-0.00}$
σ_UCLES (m/s)	–	–	${4.94}_{- 0.70}^{+ 0.99}$ $4.94^{+0.99}_{-0.70}$	–	${4.41}_{- 0.63}^{+ 0.92}$ $4.41^{+0.92}_{-0.63}$	${5.65}_{- 0.67}^{+ 0.81}$ $5.65^{+0.81}_{-0.67}$
σ_TERRA1 (m/s)	${2.03}_{- 0.38}^{+ 0.45}$ $2.03^{+0.45}_{-0.38}$	${1.93}_{- 0.37}^{+ 0.50}$ $1.93^{+0.50}_{-0.37}$	${2.49}_{- 0.36}^{+ 0.03}$ $2.49^{+0.03}_{-0.36}$	–	–	${1.61}_{- 0.13}^{+ 0.18}$ $1.61^{+0.18}_{-0.13}$
σ_TERRA2 (m/s)	${1.33}_{- 0.05}^{+ 0.09}$ $1.33^{+0.09}_{-0.05}$	${1.13}_{- 0.14}^{+ 0.24}$ $1.13^{+0.24}_{-0.14}$	–	${1.25}_{- 0.13}^{+ 0.14}$ $1.25^{+0.14}_{-0.13}$	–	${1.38}_{- 0.15}^{+ 0.17}$ $1.38^{+0.17}_{-0.15}$
σ_PFS (m/s)	–	${3.15}_{- 0.45}^{+ 0.58}$ $3.15^{+0.58}_{-0.45}$	–	${3.66}_{- 0.31}^{+ 0.10}$ $3.66^{+0.10}_{-0.31}$	–	${3.12}_{- 0.12}^{+ 0.29}$ $3.12^{+0.29}_{-0.12}$
BIC	595.540	850.161	469.948	758.665	358.478	1209.520
logZ	−288.352	−424.660	−223.560	−369.246	−169.400	−582.577
RMS	1.806	2.431	4.568	2.553	4.915	3.741
χ²_red	1.117	1.203	1.188	1.103	1.467	1.172

Notes. The overall best fit of orbital and instrumental parameters solutions for HD 208487 is listed under ALL.

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