Very Small Radar-Detected Near-Earth Asteroids: D < 200 m


Last modified: 2017 October 16

http://echo.jpl.nasa.gov/~lance/small.neas.html

Objects with H > 21 (diameters less than about 200 meters):

	        Absolute       2x vis rng  Diameter (m)  Rotation
      Asteroid  magnitude    extent (m) pv=0.05 pv=0.2 Period (h) SC/OC       Reference
      --------  --------    ---------- ------- ------ ---------- -----       ---------
       1994 CJ1    21.3 
       1998 BY7    21.5          NA       300     150    <1.3      0.4 +/-0.04   9       PHA
326290 1998 HE3    21.7                                   0.07                   8       PHA
       1998 KY26   25.5          30*       48      24     0.178    0.5 +/-0.1    3
       1999 FN19   22.4         110       190      95   <11        0.22+/-0.01   5
       1999 MN     21.6                                                          7       PHA
       1999 NW2    23.1          NA       150      72    <4.2      0.35+/-0.02   5
       1999 TN13   23.6          NA       120      57    <1.3                    5
       1999 TY2    23.3          NA       130      66     0.121                  4, 8 
       2000 EH26   21.2         120       260     130   <33                      1       PHA
       2000 EW70   21.1         360       360     180   <33                      7       PHA
       2000 LF3    21.6          NA       300     150    <1.0     <0.2           8       PHA
 54509 YORP        22.3         120       170      90     0.288    0.29+/-0.02   7, 10         2000 PH5
       2000 UK11   25.0         <60        52      26    ~0.05                   2
       2000 YA     23.7         120       110      52    <1.3                    1
       2001 AV43   24.3          NA        72      36                            8
       2001 BB16   23.1              
       2001 BF10   22.3          NA       170      83    <0.4                    6
       2001 CP36   23.7          90       110      55    slow?    ~1.0           8
       2001 EC16   22.2         150       200     100    slow     ~0.2           7
       2001 FR85   24.5           ?        79      40                            8
       2001 JV1    21.3           ?       320     160   <29                      9       PHA
       2001 CQ36   22.7                                                         15
       2001 SP263  25.6                    42      21                            8
       2001 TA2    21.7                                                         17
       2001 UP     25.7                    44      22                            8
       2001 WM15   25.0                    60      30                            8
       2001 XX4    21.9                   250     130                            8
       2001 YP3    21.9                   250     130                            8       PHA
       2002 AA29   24.1                                            0.25+/-0.08  12
       2002 AV     20.7                   380     190                            9       PHA
       2002 BF25   22.6                                                         16
       2002 FD6    22.3         110       210     110   ~1 h                     5
       2002 LY1    22.1 
363305 2002 NV16   21.4                                                         8        PHA  
       2002 TS69   24.4                    80      40                            8
       2002 TZ66   25.9                    40      20   <1.1       0.0+/-0.16    5
       2003 DZ15   22.3                                                          8
       2003 EP4    23.7                                                          8
       2003 HM     21.7                                                          8
       2003 HN16   22.0                                                          8
       2003 MS2    21.3         380       330     170   ~6?       ~0.5           5       PHA
       2003 QB30   26.3                    33      17                           11
       2003 RU11   25.6                    46      23   fast                     8
       2003 SR84   25.2                                                          5 
       2003 SS84   21.7                   275     138                            8, 13   PHA BINARY 
       2003 TH2    22.8                                                          6
       2003 WH166  21.9                                                         15       PHA
       2004 AD     24.3                                                          6
       2004 FY31   21.9                   251     126   very fast                5       PHA
       2004 HX53   23.0                                                          8
       2004 KH17   21.9                                                          8       PHA
       2004 XL14   21.4                                                         14       PHA
348306 2005 AY28   21.5
265482 2005 EE     21.3
       2005 ES70   23.8
       2005 EU2    22.8        ~300                                              6,5
       2005 FA     25.2                                                          8
       2005 HB4    24.4                                                          8
       2005 TD49   26.4                                                          8
       2005 TU50   21.5                                                          8       PHA
       2005 WA1    21.6                                                          8       PHA
       2005 WK56   22.6                                                          8
       2005 XA     26.1                                                          8
       2005 YU55   21.9       ~400                                               6       PHA
       2006 AM4    21.8                                                          8, 13   PHA
       2006 CT     22.3                                                         18 
       2006 QV89   25.2                                                          8
       2006 RH120  29.6                                                          5  (6R10DB9)
       2006 UQ17   21.9                                                          8       PHA
       2006 WB     22.8         150                                             14
       2007 CN26   21.0                                                         15       PHA
       2007 EC     22.2
       2007 EH     27.6                                                          8
       2007 FY20   24.8                                                          6
       2007 TV18   23.4
       2009 DL46   21.5
       2009 DO111  22.8                                                         15
       2009 DR3    21.5                                                         15       PHA
410777 2009 FD     22.1 
       2009 SC15   21.5                                                         15
       2009 WV25   24.0                                                         15
       2010 AL30   27.0                                                         15
       2010 AF40   25.0                                                         15
       2010 DJ1    26.8                                                         15
       2010 GU21   21.1                                                          5       PHA
       2010 JK1    24.4                                                         15 
       2010 JN71   21.4                                                          8       PHA
       2010 KX7    21.9                                                          8       PHA
438955 2010 LN14   21.1
       2010 NY65   21.5
       2010 UP     24.5                                                          8
       2010 UM7    27.6                                                          8
       2010 VB1    23.2
       2011 AK5    21.4
       2011 BT15   21.7
462959 2011 DU     21.0
       2011 JY1    24.5                                                          8
       2011 SE97   24.7                                                          8
       2011 TB4    25.5
       2011 UB     27.5                                                         15
       2011 WN2    25.2                                                          5
       2011 WS74   23.9                                                          8
       2011 WS95   24.9                                                          8
       2011 XD1    23.9                                                         17
       2011 YC29   22.2
       2011 YH40   23.0                                                         15  
       2012 BD14   26.7                                                         17
       2012 BX34   27.6                                                         15
       2012 DA14   24.1                                                          5
       2012 DH54   27.6                                                          5  
       2012 DR32   24.6
       2012 DW60   26.5                                                          5
       2012 DX     27.6                                                         17
       2012 DX13   23.9                                                          8
       2012 EO8    24.4                                                          8
       2012 HL     22.6                                                          8
       2012 HM     24.0                                                          5
       2012 HM8    23.9                                                          8
       2012 MY2    26.3                                                         
       2012 OQ     21.8                                                         15       PHA
       2012 PX     23.2                                                          8
       2012 TC4    26.7
       2012 WH1    23.9                                                          6
       2012 XB112  29.7                                                         15
       2013 BS45   25.7                                                         15
       2013 BV15   24.3                                                         15
       2013 BZ45   21.9
       2013 CZ87   25.9                                                         17
       2013 EA     22.1                                                         15
       2013 EC20   29.0                                                         15
       2013 ET     23.1                                                         15
       2013 FB8    24.9                                                         15
       2013 FK     23.2
       2013 GJ69   26.5                                                          8
       2013 GR38   21.8                                                          8
       2013 HT15   21.8                                                         15
       2013 JR28   21.6                                                          6       PHA
       2013 LB2    22.6                                                          6
       2013 LL25   22.7                                                          8 
       2013 NJ     21.8                                                         15       PHA
       2013 QN11   21.5                                                          8
       2013 QR1    21.5                                                          8
       2013 RH74   21.0                                                          8       PHA
       2013 SU24   24.6                                                         15
       2013 UB     26.7                                                         15
       2013 UF3    22.1                                                         17
       2013 VJ11   27.8                                                          6 
       2013 VO5    21.2                                                          6       PHA
       2013 XA4    21.4                                                          6
       2013 XG10   25.5                                                          6 
       2013 XH22   26.1                                                         15
       2013 XX8    24.4
       2013 XY8    24.7                                                         15
       2013 XZ9    22.5                                                         17
       2014 AD16   27.4
       2014 AY28   21.8
       2014 BR57   23.9
       2014 CU13   21.6
       2014 DJ23   22.0
       2014 EP12   25.6 
       2014 EQ12   21.0
       2014 EY24   24.0
       2014 FO38   26.1
       2014 FS52   24.4
       2014 GO17   23.0
       2014 GP17   25.2
       2014 HM4    26.9
       2014 HO132  25.4
       2014 HT46   26.6
       2014 KF22   26.5 
       2014 JL25   22.6
       2014 KH39   26.2
       2014 LK21   26.0
       2014 QY33   26.2 
       2014 RC     26.8
       2014 RQ17   22.3
       2014 SC324  24.1
       2014 TJ17   24.9
       2014 TV     24.3
       2014 TX57   21.3
       2014 TW     26.2
       2014 UR     26.6
       2014 UV210  26.5
       2014 VP35   22.7
       2014 WU200  29.0
       2014 WW201  25.0       
       2014 WX202  29.4  
       2014 YE15   28.3
       2014 YQ8    23.7
       2014 YR14   26.1
       2014 YS     24.6
       2015 AK45   26.4
       2015 BE92   28.1
       2015 BG92   25.1
       2015 CW13   23.0
       2015 EL7    22.5
       2015 FQ     22.3
       2015 FW117  22.8
       2015 GA1    26.6
       2015 HD10   26.7
       2015 HM10   23.6
       2015 HS11   27.4
       2015 JH2    22.4
       2015 KA122  23.2
       2015 KW120  26.0
       2015 LJ     24.6
       2015 LK24   21.5
       2015 LQ21   24.1
       2015 LR21   26.4
       2015 MA54   25.3
       2015 MO116  24.0
       2015 MW53   21.4
       2015 NA14   22.2
       2015 OQ21   27.8
       2015 PK9    23.6
       2015 QT3    23.9
       2015 RF36   23.2
       2015 RH2    22.0
       2015 SZ     23.6
       2015 SZ2    25.4
       2015 TC25   29.5
       2015 TD144  22.6
       2015 VZ145  23.6
       2015 WA13   26.2
       2015 WE2    22.4
       2015 WF13   26.2
       2015 WZ12   26.5
       2015 XA378  25.7
       2015 XA379  25.3
       2015 XC     25.2        
       2015 XC352  25.8
       2015 XE     24.7
       2015 XL1    22.4
       2015 XN55   27.4
       2015 XU378  21.4
       2016 CF194  24.0
       2016 CL264  19.1
       2016 DV1    24.9
       2016 GS2    23.0
       2016 HD3    28.0
       2016 HK     24.8
       2016 JC6    21.3
       2016 JD18   24.7
       2016 LG     25.4
       2016 LO48   25.4
       2016 LY8    23.1 
       2016 ND39   25.2
       2016 NJ33   25.2
       2016 NN15   26.7
       2016 PQ     25.9
       2016 RB1    27.8
       2016 RD34   27.1 
       2016 RE34   28.3
       2016 TB57   26.1
       2016 TG55   25.9
       2016 TY55   26.9
       2016 UB107  25.1
       2016 UY56   23.8
       2016 VC1    21.7
       2016 VR     26.2
       2016 VX1    25.2
       2016 VY1    24.7
       2016 XE     28.2
       2016 WB8    25.9
       2016 WG7    26.1
       2016 WQ3    28.8
       2016 XK18   24.3
       2016 YB8    24.5
       2016 YC8    24.6
       2017 BM123  23.7
       2017 BQ6    21.4
       2017 BW     23.4
       2017 BY93   23.1
       2017 CP1    24.6
       2017 CF32   26.0
       2017 DA38   24.6
       2017 DV15   25.2
       2017 ED     26.4
       2017 EF     27.1
       2017 EK     24.1
       2017 FF128  25.9
       2017 FQ127  26.0
       2017 FR63   26.1
       2017 FR91   26.9
       2017 FU64   23.8
       2017 FU102  28.7
       2017 FV     24.3
       2017 FX90   26.3
       2017 FZ2    26.7
       2017 HB1    26.2
       2017 HK1    25.0
       2017 KJ27   25.5       
       2017 KR27   23.5
       2017 LE     26.2
       2017 MB3    25.3 
       2017 MC3    24.1  
       2017 ME4    26.2
       2017 MQ7    23.1
       2017 NH     21.7

N = 300 (300/724 = 41.4% of all radar-detected NEAs)

NEAs with H >= 22.0: 241/724 = 0.333


Percentage of small radar-detected NEAs that are binaries: 3/299 = 1.0%

Note: NEA satellites < 200 m in diameter are not included.

NA = visible range extent is not available (was not measured).

* = 3-D shape model diameter was used (1998 KY26 only).

Diameters are listed assuming C-type (0.05) and S-type (0.20) optical geometric albedos,
except for 1998 K26, for which a 3-D shape model is available. 

In the rotation period estimates, if rotation periods have not been reported in
the peer-reviewed literature or in personal communications, in most cases 
an optical albedo of 0.05 was assumed and was used to estimate an upper bound 
on the diameter.  That upper bound and the bandwidth were used to estimate 
upper bounds on the rotation periods.  With 1999 NW2, M. Hicks (pers. comm.) 
obtained photometric colors indicating an SQ-type composition, so an optical 
albedo of 0.2 was assumed to estimate the diameter and to constrain the 
rotation period.

The upper bound on the rotation period of 2000 YA from radar observations is
consistent with the periods estimated from photometry by P. Pravec.  Pravec's
period is ambiguous by a factor of two (1.3 h or 0.65 h).

2000 EW70 is included because it has H > 21.0 even though it has a visible range 
extent of about 180 meters.



REFERENCES
----------

1. Benner, L. A. M., M. C. Nolan, J.-L. Margot, J. D. Giorgini, R. S. Hudson, R. F. Jurgens,
     and S. J. Ostro 2001.  Recent radar observations of four near-Earth asteroids.  
     Bull. Am. Astron. Soc. 33, 918. [Abstract]

2. Nolan, M. C., J.-L. Margot, E. S. Howell, L. A. M. Benner, S. J. Ostro, R. F. Jurgens, 
     J. D. Giorgini, and D. B. Campbell 2001.  Radar observations of near-Earth asteroids
     2000 UG11 and 2000 UK11.  Lunar Planet Sci. XXXII, #2055. [Abstract]

3. Ostro, S. J., P. Pravec, L. A. M. Benner, R. S. Hudson, L. Sarounova, M. D. Hicks, D. L. Rabinowitz,
     J. V. Scotti, D. J. Tholen, M. Wolf, R. F. Jurgens, M. L. Thomas, J. D. Giorgini, P. W. Chodas,
     D. K. Yeomans, R. Rose, R. Frye, K. D. Rosema, R. Winkler, and M. A. Slade 1999.  Radar and
     optical observations of asteroid 1998 KY26.  Science 285, 557-559.

4. Pravec, P., C. Hergenrother, R. Whiteley, L. Sarounova, P. Kusnirak, and M. Wolf 2000.
     Fast rotating asteroids 1999 TY2, 1999 SF10, and 1998 WB2.  Icarus 147, 477-486.

5. Benner, L. A. M, et al., unpublished.

6. Howell, E. S., et al., unpublished.

7. Margot, J.-L., et al., unpublished.

8. Nolan, M. C., et al., unpublished.

9. Ostro, S. J., et al., unpublished.

10.Sarounova, L., et al., unpublished.

11.Shepard, M. K., et al., unpublished.

12.Ostro, S. J., J. D. Giorgini, L. A. M. Benner, A. A. Hine, M. C. Nolan, J. L. Margot, P. W.
     Chodas, and C. Veillet 2003.  Radar detection of asteroid 2002 AA29.  Icarus, in press.

13.Nolan, M. C., A. A. Hine, E. S. Howell, L. A. M. Benner 2003 2003 SS84. IAU Circ. No. 8220.

14. Busch, M. W., et al., unpublished.

15. Brozovic, M., et al. , unpublished.

16. Nugent, C., et al. unpublished.

17. Taylor, P., et al. unpublished.

18. Springmann, A., et al., unpublished

Lance Benner
Last modified: Thu Dec 14 13:24:39 PST 2006