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Starry Night 2.1 (Deluxe)
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Starry Night Deluxe Version 2.1 (Sienna Software)(1998).iso
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Asteroid Info
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Magnitude to Size (Table)
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1997-02-21
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Conversion of Absolute Magnitude(H) to Diameter
The following table lists the diameters of minor planets corresponding
to the given values of the absolute magnitude, H.
Note that the scale switches from km to metres at 18th magnitude.
Conversion of H to a diameter for a specific object requires knowledge
of the object's albedo. This quantity is not known for most objects, so
the diameters listed here are given as ranges: the smaller value
corresponding to an albedo of 0.25 and the larger to an albedo of 0.05.
Most objects have albedos in this range. If a specific object has an
albedo < 0.05, the diameter will be larger than the upper limit listed
here. If the albedo > 0.25, the diameter will be smaller than the lower
limit given here.
------------------------------------------------------------------------
H Diameter
3.0 670 - 1500 km
3.5 530 - 1200 km
4.0 420 - 940 km
4.5 330 - 740 km
5.0 260 - 590 km
5.5 210 - 470 km
6.0 170 - 370 km
6.5 130 - 300 km
7.0 110 - 240 km
7.5 85 - 190 km
8.0 65 - 150 km
8.5 50 - 120 km
9.0 40 - 95 km
9.5 35 - 75 km
10.0 25 - 60 km
10.5 20 - 50 km
11.0 17 - 37 km
11.5 13 - 30 km
12.0 11 - 24 km
12.5 8 - 19 km
13.0 7 - 15 km
13.5 5 - 12 km
14.0 4 - 9 km
14.5 3 - 7 km
15.0 3 - 6 km
15.5 2 - 5 km
16.0 2 - 4 km
16.5 1 - 3 km
17.0 1 - 2 km
17.5 1 - 2 km
18.0 1 - 2 km
18.5 500 - 1200 m
19.0 400 - 900 m
19.5 300 - 750 m
20.0 250 - 600 m
20.5 200 - 500 m
21.0 150 - 400 m
22.0 100 - 250 m
22.5 100 - 200 m
23.0 65 - 150 m
23.5 50 - 120 m
24.0 40 - 95 m
24.5 35 - 75 m
25.0 25 - 60 m
25.5 20 - 50 m
26.0 17 - 37 m
26.5 13 - 30 m
27.0 11 - 24 m
27.5 8 - 19 m
28.0 7 - 15 m
28.5 5 - 12 m
29.0 4 - 9 m
29.5 3 - 7 m
30.0 3 - 6 m
Data originally from the Minor Planet Centre.
The Minor Planet Center (MPC) is located at:
http://cfa-www.harvard.edu/cfa/ps/mpc.html