Organic detection in the near-infrared spectral Phobos regolith laboratory analogue in preparation for the Martian Moon eXploration mission

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Table 3

Phase reddening coefficients for different small bodies and for different wavelength ranges.

Object	Wavelength range	γ (10⁻⁴ nm⁻¹/°)	Y₀ (%.(100 nm)⁻¹)	References
67P/Churyumov-Gerasimenko	535–882 nm	0.104 ± 0.003	11.3 ± 0.2	Fornasier et al. (2015)
	1–2 µm	0.018	–	Ciarniello et al. (2015)
Bennu	550–860 nm	0.01414 ± 0.00100	−0.130 ± 0.009	Fornasier et al. (2020)
	0.55–2.5 µm	0.00440 ± 0.00028	−0.5 ± 0.04	Fornasier et al. (2020)
Phobos	360–990 nm	0.0046	–	Pajola et al. (2012)
Phobos spectral laboratory analogue (mix. 16)	1.5–2.4 µm	0.019 ± 0.001	−0.08 ± 0.05	This work

Notes. Phase reddening coefficients were determined from a linear fit of the spectral slope values as a function of the phase angle. We note that γ represents the phase reddening coefficient and Y₀ the spectral slope at zero phase angle.

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