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JPL Small-Body Database Browser
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66237 (1999 ET5)
Classification: Main-belt Asteroid          SPK-ID: 2066237
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07692950104934927 3.2097e-08  
a 2.756536891288694 1.5824e-08 au
q 2.544477883617731 9.2397e-08 au
i 4.941628703705489 4.5017e-06 deg
node 147.6281727370578 4.4539e-05 deg
peri 301.7221174258179 5.5676e-05 deg
M 302.1976045465878 3.345e-05 deg
tp 2459268.903068541115
(2021-Feb-23.40306854)
0.00015607 TDB
period 1671.645334364726
4.58
1.4394e-05
3.941e-08
d
yr
n .2153566863731956 1.8544e-09 deg/d
Q 2.968595898959658 1.7041e-08 au
  Orbit Determination Parameters
   # obs. used (total)      840  
   data-arc span      9452 days (25.88 yr)  
   first obs. used      1994-01-19  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57244  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 06:58:58  

Additional Information
 Earth MOID = 1.5653 au 
 Jupiter MOID = 2.1659 au 
 T_jup = 3.334 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO449421  
diameter diameter 5.230 km 0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.078   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66237 (1999 ET5)          Discovered 1999-Mar-13 by Tucker, R. A. at Goodricke-Pigott
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 ET5 = 2001 RO116 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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