Mar. 03, 2004

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Conversion of absolute magnitude to diameter

is defined as (see www.physics.sfasu.edu).

Graphical conversion

Table conversion
Conversion of absolute magnitude to diameter (in km)

H [mag]                                      albedo 

          0.50     0.45     0.40     0.35     0.30     0.25     0.20     0.15     0.10     0.05

 0.5      1493     1574     1669     1784     1927     2111     2361     2726     3338     4721
 1.0      1186     1250     1326     1417     1531     1677     1875     2165     2652     3750
 1.5     942.0    992.9     1053     1126     1216     1332     1489     1720     2106     2979
 2.0     748.2    788.7    836.6    894.3    966.0     1058     1183     1366     1673     2366
 2.5     594.3    626.5    664.5    710.4    767.3    840.5    939.7     1085     1329     1879
 3.0     472.1    497.6    527.8    564.3    609.5    667.7    746.5    861.9     1056     1493
 3.5     375.0    395.3    419.3    448.2    484.1    530.3    592.9    684.7    838.5     1186
 4.0     297.9    314.0    333.0    356.0    384.6    421.3    471.0    543.9    666.1    942.0
 4.5     236.6    249.4    264.5    282.8    305.5    334.6    374.1    432.0    529.1    748.2
 5.0     187.9    198.1    210.1    224.6    242.6    265.8    297.2    343.1    420.3    594.3
 5.5     149.3    157.4    166.9    178.4    192.7    211.1    236.1    272.6    333.8    472.1
 6.0     118.6    125.0    132.6    141.7    153.1    167.7    187.5    216.5    265.2    375.0
 6.5     94.20    99.29    105.3    112.6    121.6    133.2    148.9    172.0    210.6    297.9
 7.0     74.82    78.87    83.66    89.43    96.60    105.8    118.3    136.6    167.3    236.6
 7.5     59.43    62.65    66.45    71.04    76.73    84.05    93.97    108.5    132.9    187.9
 8.0     47.21    49.76    52.78    56.43    60.95    66.77    74.65    86.19    105.6    149.3
 8.5     37.50    39.53    41.93    44.82    48.41    53.03    59.29    68.47    83.85    118.6
 9.0     29.79    31.40    33.30    35.60    38.46    42.13    47.10    54.39    66.61    94.20
 9.5     23.66    24.94    26.45    28.28    30.55    33.46    37.41    43.20    52.91    74.82
10.0     18.79    19.81    21.01    22.46    24.26    26.58    29.72    34.31    42.03    59.43
10.5     14.93    15.74    16.69    17.84    19.27    21.11    23.61    27.26    33.38    47.21
11.0     11.86    12.50    13.26    14.17    15.31    16.77    18.75    21.65    26.52    37.50
11.5     9.420    9.929    10.53    11.26    12.16    13.32    14.89    17.20    21.06    29.79
12.0     7.482    7.887    8.366    8.943    9.660    10.58    11.83    13.66    16.73    23.66
12.5     5.943    6.265    6.645    7.104    7.673    8.405    9.397    10.85    13.29    18.79
13.0     4.721    4.976    5.278    5.643    6.095    6.677    7.465    8.619    10.56    14.93
13.5     3.750    3.953    4.193    4.482    4.841    5.303    5.929    6.847    8.385    11.86
14.0     2.979    3.140    3.330    3.560    3.846    4.213    4.710    5.439    6.661    9.420
14.5     2.366    2.494    2.645    2.828    3.055    3.346    3.741    4.320    5.291    7.482
15.0     1.879    1.981    2.101    2.246    2.426    2.658    2.972    3.431    4.203    5.943
15.5     1.493    1.574    1.669    1.784    1.927    2.111    2.361    2.726    3.338    4.721
16.0     1.186    1.250    1.326    1.417    1.531    1.677    1.875    2.165    2.652    3.750
16.5     0.942    0.993    1.053    1.126    1.216    1.332    1.489    1.720    2.106    2.979
17.0     0.748    0.789    0.837    0.894    0.966    1.058    1.183    1.366    1.673    2.366
17.5     0.594    0.626    0.664    0.710    0.767    0.841    0.940    1.085    1.329    1.879
18.0     0.472    0.498    0.528    0.564    0.609    0.668    0.746    0.862    1.056    1.493
18.5     0.375    0.395    0.419    0.448    0.484    0.530    0.593    0.685    0.839    1.186
19.0     0.298    0.314    0.333    0.356    0.385    0.421    0.471    0.544    0.666    0.942
19.5     0.237    0.249    0.265    0.283    0.305    0.335    0.374    0.432    0.529    0.748
20.0     0.188    0.198    0.210    0.225    0.243    0.266    0.297    0.343    0.420    0.594
20.5     0.149    0.157    0.167    0.178    0.193    0.211    0.236    0.273    0.334    0.472
21.0     0.119    0.125    0.133    0.142    0.153    0.168    0.188    0.217    0.265    0.375
21.5     0.094    0.099    0.105    0.113    0.122    0.133    0.149    0.172    0.211    0.298
22.0     0.075    0.079    0.084    0.089    0.097    0.106    0.118    0.137    0.167    0.237
22.5     0.059    0.063    0.066    0.071    0.077    0.084    0.094    0.109    0.133    0.188
23.0     0.047    0.050    0.053    0.056    0.061    0.067    0.075    0.086    0.106    0.149
23.5     0.038    0.040    0.042    0.045    0.048    0.053    0.059    0.068    0.084    0.119
24.0     0.030    0.031    0.033    0.036    0.038    0.042    0.047    0.054    0.067    0.094
24.5     0.024    0.025    0.026    0.028    0.031    0.033    0.037    0.043    0.053    0.075
25.0     0.019    0.020    0.021    0.022    0.024    0.027    0.030    0.034    0.042    0.059
25.5     0.015    0.016    0.017    0.018    0.019    0.021    0.024    0.027    0.033    0.047
26.0     0.012    0.013    0.013    0.014    0.015    0.017    0.019    0.022    0.027    0.038
26.5     0.009    0.010    0.011    0.011    0.012    0.013    0.015    0.017    0.021    0.030
27.0     0.007    0.008    0.008    0.009    0.010    0.011    0.012    0.014    0.017    0.024
27.5     0.006    0.006    0.007    0.007    0.008    0.008    0.009    0.011    0.013    0.019
28.0     0.005    0.005    0.005    0.006    0.006    0.007    0.007    0.009    0.011    0.015
28.5     0.004    0.004    0.004    0.004    0.005    0.005    0.006    0.007    0.008    0.012
29.0     0.003    0.003    0.003    0.004    0.004    0.004    0.005    0.005    0.007    0.009
29.5     0.002    0.002    0.003    0.003    0.003    0.003    0.004    0.004    0.005    0.007
30.0     0.002    0.002    0.002    0.002    0.002    0.003    0.003    0.003    0.004    0.006
30.5     0.001    0.002    0.002    0.002    0.002    0.002    0.002    0.003    0.003    0.005
31.0     0.001    0.001    0.001    0.001    0.002    0.002    0.002    0.002    0.003    0.004

          0.50     0.45     0.40     0.35     0.30     0.25     0.20     0.15     0.10     0.05

H [mag]                                      albedo