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JPL Small-Body Database Browser
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59957 (1999 RH231)
Classification: Main-belt Asteroid          SPK-ID: 2059957
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1869195615481185 5.1671e-08  
a 2.700389966008473 1.8568e-08 au
q 2.195634257553231 1.3673e-07 au
i 8.063177757339348 5.8358e-06 deg
node 89.42987659327636 3.7999e-05 deg
peri 273.4727490210586 4.1027e-05 deg
M 238.4423620833394 1.5954e-05 deg
tp 2459547.790496510827
(2021-Nov-29.29049651)
7.4092e-05 TDB
period 1620.832570627746
4.44
1.6718e-05
4.577e-08
d
yr
n .2221080736677031 2.2909e-09 deg/d
Q 3.205145674463715 2.2039e-08 au
  Orbit Determination Parameters
   # obs. used (total)      491  
   data-arc span      7591 days (20.78 yr)  
   first obs. used      1998-06-21  
   last obs. used      2019-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56401  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:57:51  

Additional Information
 Earth MOID = 1.21128 au 
 Jupiter MOID = 2.30452 au 
 T_jup = 3.328 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.1   n/a MPO436201  
diameter diameter 4.040 km 0.968 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

59957 (1999 RH231)          Discovered 1999-Sep-08 by CSS at Catalina
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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