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172871 (2005 EH137)
Classification: Main-belt Asteroid          SPK-ID: 2172871
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1576992240684833 6.5766e-08  
a 2.538580105771427 1.5308e-08 au
q 2.138247992855585 1.7142e-07 au
i 2.895572884327243 5.7602e-06 deg
node 52.06337260203666 0.00011579 deg
peri 179.1276943517477 0.00011741 deg
M 243.8577653210807 2.3621e-05 deg
tp 2459477.120164804644
(2021-Sep-19.62016480)
9.9475e-05 TDB
period 1477.354554129442
4.04
1.3363e-05
3.659e-08
d
yr
n .2436788102041872 2.2042e-09 deg/d
Q 2.938912218687269 1.7723e-08 au
  Orbit Determination Parameters
   # obs. used (total)      368  
   data-arc span      9220 days (25.24 yr)  
   first obs. used      1994-09-05  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62461  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 13:01:23  

Additional Information
 Earth MOID = 1.12763 au 
 Jupiter MOID = 2.05141 au 
 T_jup = 3.427 
[ 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 16.4   n/a MPO454186  
diameter diameter 2.485 km 0.542 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.079   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

172871 (2005 EH137)          Discovered 2005-Mar-09 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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