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91442 (1999 RD17)
Classification: Main-belt Asteroid          SPK-ID: 2091442
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2230090991681263 4.4436e-08  
a 2.808062657011761 1.7282e-08 au
q 2.181839133463913 1.2321e-07 au
i 6.91788646521805 5.0671e-06 deg
node 203.0390185338795 3.779e-05 deg
peri 104.20181946 3.9533e-05 deg
M 173.7237066967761 1.203e-05 deg
tp 2458171.097759036313
(2018-Feb-21.59775904)
5.3963e-05 TDB
period 1718.733801070044
4.71
1.5867e-05
4.344e-08
d
yr
n .2094565195470482 1.9336e-09 deg/d
Q 3.43428618055961 2.1136e-08 au
  Orbit Determination Parameters
   # obs. used (total)      614  
   data-arc span      7461 days (20.43 yr)  
   first obs. used      1999-08-22  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54438  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:30:15  

Additional Information
 Earth MOID = 1.17998 au 
 Jupiter MOID = 1.90651 au 
 T_jup = 3.275 
[ 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 15.4   n/a MPO412707  
diameter diameter 3.988 km 0.892 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.084   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91442 (1999 RD17)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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