RedDots: Multiplanet system around M dwarf GJ 887 in the solar neighborhood

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Volume 707 (March 2026)

A&A, 707 (2026) A93

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Table A.6

Same as Table 3 for five-planet model.

Parameter	candidate f	planet e	planet b	planet c	planet d
P [days]	${2.21661}_{- 0.00009}^{+ 0.00010}$ $Mathematical equation: $2.21661_{-0.00009}^{+0.00010}$$	${4.42494}_{- 0.00013}^{+ 0.00012}$ $Mathematical equation: $4.42494_{-0.00013}^{+0.00012}$$	${9.2619}_{- 0.0005}^{+ 0.0005}$ $Mathematical equation: $9.2619_{-0.0005}^{+0.0005}$$	${21.784}_{- 0.004}^{+ 0.004}$ $Mathematical equation: $21.784_{-0.004}^{+0.004}$$	${50.77}_{- 0.04}^{+ 0.05}$ $Mathematical equation: $50.77_{-0.04}^{+0.05}$$
K [m/s]	${0.37}_{- 0.09}^{+ 0.08}$ $Mathematical equation: $0.37_{-0.09}^{+0.08}$$	${0.92}_{- 0.09}^{+ 0.09}$ $Mathematical equation: $0.92_{-0.09}^{+0.09}$$	${2.05}_{- 0.16}^{+ 0.16}$ $Mathematical equation: $2.05_{-0.16}^{+0.16}$$	${2.54}_{- 0.27}^{+ 0.27}$ $Mathematical equation: $2.54_{-0.27}^{+0.27}$$	${1.7}_{- 0.4}^{+ 0.4}$ $Mathematical equation: $1.7_{-0.4}^{+0.4}$$
t₀ [BJD]	${2453486.46}_{- 0.19}^{+ 0.18}$ $Mathematical equation: $2453486.46_{-0.19}^{+0.18}$$	${2453488.04}_{- 0.12}^{+ 0.13}$ $Mathematical equation: $2453488.04_{-0.12}^{+0.13}$$	${2453492.73}_{- 0.25}^{+ 0.25}$ $Mathematical equation: $2453492.73_{-0.25}^{+0.25}$$	${2453498.2}_{- 0.9}^{+ 0.9}$ $Mathematical equation: $2453498.2_{-0.9}^{+0.9}$$	$2453496_{- 4}^{+ 4}$ $Mathematical equation: $2453496_{-4}^{+4}$$
e	–	–	${0.13}_{- 0.05}^{+ 0.05}$ $Mathematical equation: $0.13_{-0.05}^{+0.05}$$	${0.17}_{- 0.06}^{+ 0.06}$ $Mathematical equation: $0.17_{-0.06}^{+0.06}$$	–
ω [rad]	–	–	${2.9}_{- 2.0}^{+ 2.3}$ $Mathematical equation: $2.9_{-2.0}^{+2.3}$$	${3.4}_{- 2.3}^{+ 2.0}$ $Mathematical equation: $3.4_{-2.3}^{+2.0}$$	–
M sin i [M_⊕]	${0.47}_{- 0.11}^{+ 0.11}$ $Mathematical equation: $0.47_{-0.11}^{+0.11}$$	${1.48}_{- 0.17}^{+ 0.18}$ $Mathematical equation: $1.48_{-0.17}^{+0.18}$$	${4.1}_{- 0.5}^{+ 0.5}$ $Mathematical equation: $4.1_{-0.5}^{+0.5}$$	${6.5}_{- 0.9}^{+ 1.0}$ $Mathematical equation: $6.5_{-0.9}^{+1.0}$$	${6.1}_{- 1.3}^{+ 1.4}$ $Mathematical equation: $6.1_{-1.3}^{+1.4}$$
a [AU]	${0.0263}_{- 0.0009}^{+ 0.0009}$ $Mathematical equation: $0.0263_{-0.0009}^{+0.0009}$$	${0.0417}_{- 0.0015}^{+ 0.0014}$ $Mathematical equation: $0.0417_{-0.0015}^{+0.0014}$$	${0.0683}_{- 0.0024}^{+ 0.0022}$ $Mathematical equation: $0.0683_{-0.0024}^{+0.0022}$$	${0.121}_{- 0.005}^{+ 0.004}$ $Mathematical equation: $0.121_{-0.005}^{+0.004}$$	${0.212}_{- 0.008}^{+ 0.007}$ $Mathematical equation: $0.212_{-0.008}^{+0.007}$$
T_eq [K]	$685_{- 25}^{+ 26}$ $Mathematical equation: $685_{-25}^{+26}$$	$544_{- 20}^{+ 21}$ $Mathematical equation: $544_{-20}^{+21}$$	$426_{- 16}^{+ 16}$ $Mathematical equation: $426_{-16}^{+16}$$	$320_{- 12}^{+ 12}$ $Mathematical equation: $320_{-12}^{+12}$$	$241_{- 9}^{+ 9}$ $Mathematical equation: $241_{-9}^{+9}$$
S [S_⊕]	$53_{- 8}^{+ 9}$ $Mathematical equation: $53_{-8}^{+9}$$	${20.9}_{- 2.9}^{+ 4.0}$ $Mathematical equation: $20.9_{-2.9}^{+4.0}$$	${7.8}_{- 1.1}^{+ 1.3}$ $Mathematical equation: $7.8_{-1.1}^{+1.3}$$	${2.5}_{- 0.4}^{+ 0.4}$ $Mathematical equation: $2.5_{-0.4}^{+0.4}$$	${0.81}_{- 0.12}^{+ 0.13}$ $Mathematical equation: $0.81_{-0.12}^{+0.13}$$
θ [mas]	${8.01}_{- 0.28}^{+ 0.26}$ $Mathematical equation: $8.01_{-0.28}^{+0.26}$$	${12.7}_{- 0.5}^{+ 0.5}$ $Mathematical equation: $12.7_{-0.5}^{+0.5}$$	${20.8}_{- 0.8}^{+ 0.7}$ $Mathematical equation: $20.8_{-0.8}^{+0.7}$$	${36.7}_{- 1.3}^{+ 1.2}$ $Mathematical equation: $36.7_{-1.3}^{+1.2}$$	${64.6}_{- 2.2}^{+ 2.1}$ $Mathematical equation: $64.6_{-2.2}^{+2.1}$$
C × 10⁻⁹	$258_{- 16}^{+ 19}$ $Mathematical equation: $258_{-16}^{+19}$$	$200_{- 13}^{+ 15}$ $Mathematical equation: $200_{-13}^{+15}$$	$198_{- 13}^{+ 15}$ $Mathematical equation: $198_{-13}^{+15}$$	$118_{- 8}^{+ 9}$ $Mathematical equation: $118_{-8}^{+9}$$	${32.8}_{- 2.1}^{+ 2.4}$ $Mathematical equation: $32.8_{-2.1}^{+2.4}$$

RV Parameters

μ_HARPSpre [m/s]	${8.1}_{- 0.8}^{+ 0.8}$ $Mathematical equation: $8.1_{-0.8}^{+0.8}$$	–	–	–	–
σ_w,HARPSpre [m/s]	${0.56}_{- 0.12}^{+ 0.14}$ $Mathematical equation: $0.56_{-0.12}^{+0.14}$$	–	–	–	–
μ_HARPSpost [m/s]	$- {7.7}_{- 0.9}^{+ 0.9}$ $Mathematical equation: $-7.7_{-0.9}^{+0.9}$$	–	–	–	–
σ_{w,HARPSpost [m/s]	${0.08}_{- 0.06}^{+ 0.20}$ $Mathematical equation: $0.08_{-0.06}^{+0.20}$$	–	–	–	–
μ_HARPSpw [m/s]	${1.8}_{- 1.2}^{+ 1.1}$ $Mathematical equation: $1.8_{-1.2}^{+1.1}$$	–	–	–	–
σ_w,HARPSpw [m/s]	${0.08}_{- 0.06}^{+ 0.22}$ $Mathematical equation: $0.08_{-0.06}^{+0.22}$$	–	–	–	–
μ_ESPRESSO [m/s]	${9136.8}_{- 0.6}^{+ 0.7}$ $Mathematical equation: $9136.8_{-0.6}^{+0.7}$$	–	–	–	–
σ_w,ESPRESSO [m/s]	${1.6}_{- 0.4}^{+ 0.5}$ $Mathematical equation: $1.6_{-0.4}^{+0.5}$$	–	–	–	–

GP Parameters

σ_GP,HARPSpre [m/s]	${3.8}_{- 0.5}^{+ 0.6}$ $Mathematical equation: $3.8_{-0.5}^{+0.6}$$	–	–	–	–
σ_GP,HARPSpost [m/s]	${4.1}_{- 0.5}^{+ 0.6}$ $Mathematical equation: $4.1_{-0.5}^{+0.6}$$	–	–	–	–
σ_GP,HARPSpw [m/s]	${2.5}_{- 0.6}^{+ 0.7}$ $Mathematical equation: $2.5_{-0.6}^{+0.7}$$	–	–	–	–
σ_GP,ESPRESSO [m/s]	${0.14}_{- 0.12}^{+ 0.60}$ $Mathematical equation: $0.14_{-0.12}^{+0.60}$$	–	–	–	–
P_rot,GP [days⁻²]	${38.7}_{- 0.5}^{+ 0.6}$ $Mathematical equation: $38.7_{-0.5}^{+0.6}$$	–	–	–	–
Γ_GP	${4.1}_{- 0.7}^{+ 0.8}$ $Mathematical equation: $4.1_{-0.7}^{+0.8}$$	–	–	–	–
α_GP [days⁻²]	${0.00029}_{- 0.00009}^{+ 0.00015}$ $Mathematical equation: $0.00029_{-0.00009}^{+0.00015}$$	–	–	–	–

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