NEA RADAR ALBEDO RANKING
Last modified: 2007 May 04
Radar albedo values were taken from the references below. Effective diameters
were taken from radiometric results obtained by Veeder et al. unless
indicated otherwise.
Radar Deff optical
Rank Object albedo (km) albedo Class Notes
---- ------ ------ ---- ------- ----- -----
1 6178 1986 DA 0.58 2.3 0.14 M
2 2063 Bacchus 0.33 0.63 0.56 QSV Equivalent spherical albedo from shape model
3 3199 Nefertiti 0.32 2.2 0.41 S
4 2100 Ra-Shalom 0.25 2.4 0.11 C Deff from convex hull; upper bounds on the albedos
7822 1991 CS 0.25 1.1 0.14 S Deff from convex hull; upper bounds on the albedos
6 2002 CE26 0.24 3.5 0.07 C Refers to the primary
2005 CR37 0.24 1.0 0.05 Deff from biaxial ellipsoid model
8 4179 Toutatis 0.21 2.45 0.19 S Equivalent spherical albedo from shape model
9 433 Eros 0.20 22 0.21 S 1988 Arecibo observations
10 1685 Toro 0.19 3.3 0.43 S Deff from Ostro et al. (1983)
11 6489 Golevka 0.18 0.53 0.15 S Equivalent spherical albedo from shape model
12 4769 Castalia 0.16 1.0 0.32 S Equivalent spherical albedo from shape model
13 1627 Ivar 0.15 8.1 0.14 S
1866 Sisyphus 0.15 8.2 0.18 S
3908 Nyx 0.15 1.0 0.16 V Equivalent spherical albedo from shape model
16 1580 Betulia 0.13 5.39 0.06 C Adopts the Harris et al. 2005 value H = 15.1
17 1620 Geographos 0.12 2.56 0.07 S Equivalent spherical albedo from shape model
2062 Aten 0.12 0.94 0.20 S Deff from Cruikshank et al. (1977)
52760 1998 ML14 0.12 1.0 0.17 S Equivalent spherical albedo from shape model
Taxonomy from Hicks and Weissman, pers. comm.
20 1862 Apollo 0.11 1.5 0.23 Q
10115 1992 SK 0.11 1.0 0.29 S Equivalent spherical albedo from shape model
66391 1999 KW4 a 0.11 1.5 0.20 S Equivalent spherical albedo from shape model
66391 1999 KW4 b 0.11 0.4 S Equivalent spherical albedo from shape model
24 1915 Quetzalcoatl 0.10 0.5 0.19 S
25 100085 1992 UY4 0.082 2 0.04
26 1036 Ganymed 0.064 38.5 0.17 S 1988 S-band observations
27 3757 1982 XB 0.06 0.6 0.13 S
53319 1999 JM8 ~0.06 ~7 ~0.02 P Diameter is twice the average visible range extent in
delay-Doppler images. Taxonomy from E.S. Howell, pers. comm.
29 1566 Icarus 0.04 1.27 0.33 S Deff from Harris (1998)
Mean: 0.17 +/- 0.11
Median: 0.15
Upper bounds:
4544 Xanthus <3.9 >0.22 <5.4 ? Assumes P > 2 h
2101 Adonis <1.3 >0.14 <3.1 ? Assumes P > 2 h
7335 1989 JA <0.68 >0.36 <2.2 ? Assumes P > 2 h
17511 1992 QN <0.4 >0.6 <1 X Assumes Deff = Dmax
3103 Eger <0.32 >1.5 <0.56 E D=1.5 km is a lower bound from the minimum bandwidth and P=5.7 h
1998 KY26 <0.11 ~0.03 <0.37 CBGF Deff is from the shape model
38071 1999 GU3 <0.07 >0.64 <0.08 C? Adopts P = 9.0 days from lightcurves
14827 Hypnos <0.067 >0.74 C (1986 JK)
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