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72555 (2001 EM4)
Classification: Main-belt Asteroid          SPK-ID: 2072555
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1041873555020883 4.2662e-08  
a 2.772431929876306 1.5241e-08 au
q 2.483579578792943 1.1538e-07 au
i 5.458272962827845 5.4116e-06 deg
node 13.03726968676508 4.4725e-05 deg
peri 140.6654965200369 5.1628e-05 deg
M 114.3443128279102 2.5367e-05 deg
tp 2458664.947768945670
(2019-Jun-30.44776895)
0.00011772 TDB
period 1686.124988741012
4.62
1.3904e-05
3.807e-08
d
yr
n .2135073036719556 1.7606e-09 deg/d
Q 3.061284280959669 1.6829e-08 au
  Orbit Determination Parameters
   # obs. used (total)      756  
   data-arc span      9358 days (25.62 yr)  
   first obs. used      1994-11-09  
   last obs. used      2020-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52112  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:02:43  

Additional Information
 Earth MOID = 1.49597 au 
 Jupiter MOID = 1.92519 au 
 T_jup = 3.322 
[ 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 15.18   n/a MPCxxxxx  
diameter diameter 2.248 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.220   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

72555 (2001 EM4)          Discovered 2001-Mar-02 by LONEOS at Anderson Mesa
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2001 EM4 = 1994 VC8 = 1999 TU205 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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