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JPL Small-Body Database Browser
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243915 (2001 HE57)
Classification: Main-belt Asteroid          SPK-ID: 2243915
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3308344254485978 3.9504e-08  
a 3.180349377299806 2.7582e-08 au
q 2.128180318335019 1.2268e-07 au
i 24.24305610476532 8.8823e-06 deg
node 177.4515127686589 1.2028e-05 deg
peri 100.6131049811945 1.7893e-05 deg
M 24.89388130905883 1.2546e-05 deg
tp 2458457.247968778166
(2018-Dec-04.74796878)
7.1465e-05 TDB
period 2071.622765434085
5.67
2.695e-05
7.379e-08
d
yr
n .1737768120754196 2.2607e-09 deg/d
Q 4.232518436264592 3.6707e-08 au
  Orbit Determination Parameters
   # obs. used (total)      379  
   data-arc span      6803 days (18.63 yr)  
   first obs. used      2001-03-16  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64584  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 02:17:18  

Additional Information
 Earth MOID = 1.25918 au 
 Jupiter MOID = 1.88058 au 
 T_jup = 2.982 
[ 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 15.1   n/a MPO440241  
diameter diameter 8.017 km 3.223 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

243915 (2001 HE57)          Discovered 2001-Apr-25 by LONEOS at Anderson Mesa
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28

[ show close-approach data ]
Alternate Designations
 2001 HE57 = 2002 RY85 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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