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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2385087597835034 4.0703e-08  
a 2.337392037930663 8.0494e-09 au
q 1.779903561835985 9.7606e-08 au
i 2.631192174476643 4.3537e-06 deg
node 173.0984536696015 8.0169e-05 deg
peri 175.5535259031314 8.0544e-05 deg
M 279.4396066730671 7.713e-06 deg
tp 2459292.588759683586
(2021-Mar-19.08875968)
2.8305e-05 TDB
period 1305.256207716859
3.57
6.7424e-06
1.846e-08
d
yr
n .2758079202164519 1.4247e-09 deg/d
Q 2.89488051402534 9.9692e-09 au
  Orbit Determination Parameters
   # obs. used (total)      666  
   data-arc span      10153 days (27.80 yr)  
   first obs. used      1992-09-30  
   last obs. used      2020-07-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49413  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 10:23:26  

Additional Information
 Earth MOID = .773528 au 
 Jupiter MOID = 2.53488 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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