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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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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 
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Orbital Elements at Epoch 2456929.5 (2014-Sep-29.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1580280858088786 6.5545e-08  
q 2.137072020913827 1.7084e-07 au
tp 2456524.107974591371
(2013-Aug-19.60797459)
8.644e-05 TDB
node 52.07333642634887 0.0001158 deg
peri 179.3303708776363 0.00011744 deg
i 2.895956281514871 5.7608e-06 deg
  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
 Jupiter MOID = 2.05141 au 
 T_jup = 3.427 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.296103212744064E-15 -1.11690455107794E-14 -3.545996558214922E-12 -8.315735218295302E-14 -6.624984904535596E-13 -3.366484304962677E-15
q -1.11690455107794E-14 2.918645991445777E-14 9.425205275496685E-12 2.170321373821266E-13 1.782513686770025E-12 9.01161360347445E-15
tp -3.545996558214922E-12 9.425205275496685E-12 7.471803826034181E-9 1.007513726036145E-10 1.718640555304287E-9 4.616217705054853E-12
node -8.315735218295302E-14 2.170321373821266E-13 1.007513726036145E-10 1.341022223820635E-8 -1.33701845878862E-8 -3.293491219732858E-10
peri -6.624984904535596E-13 1.782513686770025E-12 1.718640555304287E-9 -1.33701845878862E-8 1.379191934741845E-8 3.300253943833358E-10
i -3.366484304962677E-15 9.01161360347445E-15 4.616217705054853E-12 -3.293491219732858E-10 3.300253943833358E-10 3.318633432066572E-11

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

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