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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1575860583339952 6.5511e-08  
a 2.538502650942061 1.2288e-08 au
q 2.138470024109703 1.7098e-07 au
i 2.89545357599812 5.0439e-06 deg
node 52.05677832204525 0.00011281 deg
peri 179.1489747374589 0.00011437 deg
M 292.5656635330656 2.224e-05 deg
tp 2459477.221846236753
(2021-Sep-19.72184624)
9.2291e-05 TDB
period 1477.286941113131
4.04
1.0726e-05
2.937e-08
d
yr
n .2436899629862978 1.7694e-09 deg/d
Q 2.938535277774418 1.4224e-08 au
  Orbit Determination Parameters
   # obs. used (total)      455  
   data-arc span      9720 days (26.61 yr)  
   first obs. used      1994-09-05  
   last obs. used      2021-04-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58966  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:02:11  

Additional Information
 Earth MOID = 1.12656 au 
 Jupiter MOID = 2.05067 au 
 T_jup = 3.427 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457489.5 (2016-Apr-11.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1584167097933944 6.5361e-08  
q 2.135342450834615 1.7056e-07 au
tp 2458000.413233150618
(2017-Sep-03.91323315)
8.7086e-05 TDB
node 52.0697623028974 0.0001128 deg
peri 179.275933757612 0.00011436 deg
i 2.896355819933193 5.046e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      455  
   data-arc span      9720 days (26.61 yr)  
   first obs. used      1994-09-05  
   last obs. used      2021-04-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58966  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:02:11  

Additional Information
 Jupiter MOID = 2.05067 au 
 T_jup = 3.427 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.272122557934478E-15 -1.113173898275913E-14 -3.863907801760027E-12 -8.257788515434974E-14 -6.655565722312389E-13 -4.102219082415506E-15
q -1.113173898275913E-14 2.909199655839028E-14 1.018787448921705E-11 2.156327165995745E-13 1.755620934709728E-12 1.08607833248501E-14
tp -3.863907801760027E-12 1.018787448921705E-11 7.584040336534121E-9 1.034593314557429E-10 1.658684858316727E-9 5.960671479173807E-12
node -8.257788515434974E-14 2.156327165995745E-13 1.034593314557429E-10 1.272366038297272E-8 -1.268538275075987E-8 -3.171323604234529E-10
peri -6.655565722312389E-13 1.755620934709728E-12 1.658684858316727E-9 -1.268538275075987E-8 1.307777909785182E-8 3.180412646329229E-10
i -4.102219082415506E-15 1.08607833248501E-14 5.960671479173807E-12 -3.171323604234529E-10 3.180412646329229E-10 2.546256572112376E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.54   n/a MPCxxxxx  
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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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