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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .18676923584446 5.1662e-08  
a 2.700524418850538 1.8787e-08 au
q 2.196149536762519 1.3666e-07 au
i 8.063248554986247 5.8589e-06 deg
node 89.42969497679201 3.8066e-05 deg
peri 273.5479315162225 4.1105e-05 deg
M 149.4922494286575 1.5733e-05 deg
tp 2457927.388879081006
(2017-Jun-22.88887908)
6.8965e-05 TDB
period 1620.953624398307
4.44
1.6915e-05
4.631e-08
d
yr
n .2220914865060566 2.3176e-09 deg/d
Q 3.204899300938557 2.2296e-08 au
  Orbit Determination Parameters
   # obs. used (total)      487  
   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      .56612  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 03:41:10  

Additional Information
 Earth MOID = 1.21097 au 
 Jupiter MOID = 2.30133 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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