Table 3
Spectrophotometric properties and Hapke parameters of 67P compared to other cometary nuclei.
| Comet | B−V | V−R | R−I | SSA | b |
|
Ageo | β [mag /°] | Phase angle coverage |
|
|
|||||||||
| 67Pa | 0.73 ± 0.07 | 0.57 ± 0.03 | 0.59 ± 0.04 | 0.052 ± 0.013 | −0.42 |
|
0.062 ± 0.002 | 0.077 ± 0.002b, 0.041 ± 0.001c | 1.2°–111.5° |
| 67Pd | − | − | − | 0.037 ± 0.002 | −0.42 ± 0.03 | 15° | 0.059 ± 0.02 e | 0.047 ± 0.002 | 1.3°–53.9° |
| 67Pf | − | 0.52 ± 0.05 | − | − | − | − | − | − | 4.8° |
| 67Pg | 0.83 ± 0.08 | 0.54 ± 0.05 | 0.46 ± 0.04 | − | − | − | − | 0.061−0.076 | 0.5°–10.6° |
| 1P/Halleyh | 0.72 ± 0.04 | 0.41 ± 0.03 | 0.39 ± 0.06 | − | − | − | − | - | 107° |
| 19P/Borrellyi | − | − | − | 0.057 ± 0.009 | −0.43 ± 0.07 | 22° ± 5° | 0.072 ± 0.020 | 0.043 | 51°–75° |
| 19P/Borrellyl | − | 0.25 ± 0.78 | − | − | − | − | − | − | 1.98° |
| 103P/Hartley 2m | 0.75 ± 0.05 | 0.43 ± 0.04 | − | 0.036 ± 0.006 | −0.46 ± 0.06 | 15° ± 10° | 0.045 ± 0.009 | 0.046 ± 0.002 | 79°–93° |
| 9P/Tempel1n | 0.84 ± 0.01 | 0.50 ± 0.01 | 0.49 ± 0.02 | 0.039 ± 0.005 | −0.49 ± 0.02 | 16° ± 8° | 0.051 ± 0.009 | 0.046 ± 0.007 | 63°–117° |
| 81/P Wild 2o | − | − | − | 0.038 ± 0.04 | −0.52 ± 0.04 | 27 ± 5° | 0.059 | 0.0513 ± 0.0002 | 11°–100° |
Notes. Ground-based observations with solar phase angle down to 13° have been included to compute the slope parameter. Gemini and HST observations at low phase angle have been included to constrain Hapke modeling and derive the slope parameter. Ground-based and HST observations with solar phase angle down to 4° have been included to compute the slope parameter.
w, b (at 0.535 μm), 
and β from Fornasier et al. (2015).
Tubiana et al. (2011). B−V has been computed from B−R and V−R measurements reported in Tubiana et al. (2011).
Photometric parameters derived in R-band by Li et al. (2007b).
Photometric parameters derived in V-band Li et al. (2007a).
Photometric parameters derived in R-band by Li et al. (2009).
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