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173257 (1999 RH120)
Classification: Main-belt Asteroid          SPK-ID: 2173257
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2384125415672499 5.5389e-08  
a 2.337071982095129 8.2794e-09 au
q 1.779884711018218 1.3036e-07 au
i 2.631232277874587 5.8239e-06 deg
node 173.1034576965536 8.0604e-05 deg
peri 175.6152438488282 8.0995e-05 deg
M 169.0023046230667 7.6915e-06 deg
tp 2457987.872219755150
(2017-Aug-22.37221976)
2.7597e-05 TDB
period 1304.988126523123
3.57
6.9347e-06
1.899e-08
d
yr
n .2758645789055164 1.4659e-09 deg/d
Q 2.894259253172039 1.0253e-08 au
  Orbit Determination Parameters
   # obs. used (total)      572  
   data-arc span      9657 days (26.44 yr)  
   first obs. used      1992-09-30  
   last obs. used      2019-03-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50822  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:22:15  

Additional Information
 Earth MOID = .772614 au 
 Jupiter MOID = 2.53209 au 
 T_jup = 3.527 
[ 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 16.4   n/a MPO266538  
diameter diameter 1.180 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.420   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173257 (1999 RH120)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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