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91487 (1999 RT117)
Classification: Main-belt Asteroid          SPK-ID: 2091487
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286297450679616 4.7019e-08  
a 2.671860454388363 1.5755e-08 au
q 2.32817972528322 1.2579e-07 au
i 13.57730818793694 4.084e-06 deg
node 282.3158211252287 2.0669e-05 deg
peri 72.29996118180881 2.6863e-05 deg
M 249.9365173320611 1.8726e-05 deg
tp 2459488.207950110240
(2021-Sep-30.70795011)
8.451e-05 TDB
period 1595.214486982891
4.37
1.411e-05
3.863e-08
d
yr
n .2256749816013056 1.9961e-09 deg/d
Q 3.015541183493506 1.7782e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1259  
   data-arc span      7645 days (20.93 yr)  
   first obs. used      1999-07-13  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46716  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:39:59  

Additional Information
 Earth MOID = 1.36289 au 
 Jupiter MOID = 2.44281 au 
 T_jup = 3.329 
[ 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 13.8   n/a MPO325093  
diameter diameter 5.260 km 0.474 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.232   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91487 (1999 RT117)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RT117 = 2000 WP86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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