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JPL Small-Body Database Browser
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91440 (1999 RK12)
Classification: Main-belt Asteroid          SPK-ID: 2091440
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05725332822774896 4.173e-08  
a 2.743696566247348 1.6934e-08 au
q 2.58661080618264 1.1699e-07 au
i 3.193439670750195 4.1999e-06 deg
node 217.2021173309278 8.4245e-05 deg
peri 126.3279722736474 9.2337e-05 deg
M 198.9846670737185 3.7091e-05 deg
tp 2459742.950117060937
(2022-Jun-12.45011706)
0.00017022 TDB
period 1659.978818689947
4.54
1.5368e-05
4.208e-08
d
yr
n .2168702371058636 2.0077e-09 deg/d
Q 2.900782326312055 1.7903e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1113  
   data-arc span      9450 days (25.87 yr)  
   first obs. used      1993-03-21  
   last obs. used      2019-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50783  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:27:53  

Additional Information
 Earth MOID = 1.58031 au 
 Jupiter MOID = 2.32679 au 
 T_jup = 3.344 
[ 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 14.7   n/a MPO432452  
diameter diameter 5.956 km 0.441 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.087   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91440 (1999 RK12)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 RK12 = 1993 FK67 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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