The novel, ch. 7: the eighteen-hour day, the eras, the long night and its three snows

The novel, ch. 15 and 16: three suns, the football, the flying stars, the tri-solar day; Wei Cheng

The novel, ch. 17 and 18: the formation computer, the two years, the syzygy and the jump; Pan Han

The novel, ch. 19, 20, 23: the giant moon, the Pendulum Monument, the Great Rip; four light-years; Alpha Centauri

The novel, ch. 11: four civilisations in 362,000 years

The novel, ch. 32: the Trisolarans' lifespan in Trisolaran hours

The novel, ch. 33: the Pendulum Monument really existed; the fleet's hours

Akeson et al. 2021, Tables 8 and 10: A 1.0788 and B 0.9092 M☉, a 17.4930″, e 0.51947; Proxima's orbit

Kervella et al. 2017, Tables 1 and 3: Proxima 0.1221 M☉, 0.1542 R☉; its orbit

Proxima's luminosity, 0.001567 L☉ (the Proxima Centauri page)

The Trisolaran hour, 0.8869 Earth hours (INST-89, from the novel's own conversion)

Pourbaix and Boffin 2016, Table 1: the AB orbit beside Akeson's

Wiegert and Holman 1997: the zones; unstable in the plane from 3.5 AU

Anglada-Escudé et al. 2016: Proxima b at 0.05 AU

Alpha Centauri at 4.344 ly; the Sun from there at +0.5 (the Alpha Centauri page)

NASA's Sun and Earth sheets: the Sun's mass, radius and density; g 9.820 m/s², S0 1,361.0 W/m², albedo 0.294

The naked eye's 1′ (the naked eye page); the magnitude scale (the apparent magnitude page)

Iron melts at 1,811 K, boils at 3,134 K (the iron page)

Dry ice 194.7 K, nitrogen 63.23 K, oxygen 54.36 K

Ice: 916.7 kg/m³, k 2.2175 W/(m·K), latent heat 333.55 kJ/kg, emissivity 0.97

ENIAC: 5,000 additions a second (the ENIAC page)

Huangpu: 20.43 km²; the world: about 8.3 billion

The speed of sound, 343 m/s at 20 °C

The angular diameter 2 asin(R/d); irradiance L/(4πd²)

The equilibrium temperature (S(1 − A)/(4σ))^¼; the substellar (S/σ)^¼

The tide 2GMR/r³ and the lift distance (2GMR/g)^⅓

The Roche limits, fluid 2.44 R(ρ_M/ρ_m)^⅓ and rigid

Free fall √(2GM/r) and its time; Kepler's period

The Lyapunov horizon t = τ ln(tol/δ₀)

The integrator: Yoshida's fourth-order kick-drift-kick, the step tied to the closest pair; the twin for τ

Staging: the Stable Era, the bench's definition: 0.5 to 2 S0 for 30 days or more

The ice sheet: quasi-steady conduction, the latent heat at the base, radiation to a sunless sky

The formation computer as a synchronous machine: steps × stages × path × time per link

Staging: the 18 h day, the hour the host sun's solar time, the upright axis, the observer at latitude 30°, the phases at t = 0, the Lagrange nudge, the presets' bearings (A 0°, B +14°, P −20°), the screen's mapping of each sun's light (the shadows lifted for the dim suns, the exposure lowered under several suns, the discs drawn after the tone curve), the Pendulum Monument's 300 m pillars 400 m away, Earth's night sky with the Sun 1.5° east of ε Cassiopeiae

What the novel says, and what the arithmetic gives: two readings at equal size