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JPL Small-Body Database Browser
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212107 (2005 ET161)
Classification: Main-belt Asteroid          SPK-ID: 2212107
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1392487396093691 4.2048e-08  
a 2.604070708816937 1.6997e-08 au
q 2.241457144760502 1.0969e-07 au
i 5.295521048548044 5.6746e-06 deg
node 169.9834100174067 5.9088e-05 deg
peri 141.4261803090922 6.3099e-05 deg
M 24.35315150265848 2.3203e-05 deg
tp 2458496.668230468238
(2019-Jan-13.16823047)
9.8612e-05 TDB
period 1534.891162950874
4.20
1.5027e-05
4.114e-08
d
yr
n .2345443173364092 2.2963e-09 deg/d
Q 2.966684272873372 1.9363e-08 au
  Orbit Determination Parameters
   # obs. used (total)      257  
   data-arc span      6237 days (17.08 yr)  
   first obs. used      2002-10-03  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5106  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 23:43:13  

Additional Information
 Earth MOID = 1.22951 au 
 Jupiter MOID = 2.30371 au 
 T_jup = 3.393 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO450006  
diameter diameter 2.448 km 0.443 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.068   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

212107 (2005 ET161)          Discovered 2005-Mar-09 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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