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91438 (1999 RA12)
Classification: Main-belt Asteroid          SPK-ID: 2091438
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1225636259645264 4.2495e-08  
a 2.805460854547978 1.6899e-08 au
q 2.461613399713039 1.1987e-07 au
i 23.83008546362177 7.3417e-06 deg
node 332.4885974741784 1.1098e-05 deg
peri 77.75476666462224 3.4221e-05 deg
M 86.65976393620936 2.9963e-05 deg
tp 2458587.338593089112
(2019-Apr-13.83859309)
0.00014265 TDB
period 1716.34562260528
4.70
1.5508e-05
4.246e-08
d
yr
n .2097479640805375 1.8951e-09 deg/d
Q 3.149308309382917 1.897e-08 au
  Orbit Determination Parameters
   # obs. used (total)      858  
   data-arc span      10177 days (27.86 yr)  
   first obs. used      1992-02-25  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49111  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:02:47  

Additional Information
 Earth MOID = 1.57421 au 
 Jupiter MOID = 2.29235 au 
 T_jup = 3.188 
[ 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 14.5   n/a MPO453354  
diameter diameter 2.901 km 0.471 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.481   0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91438 (1999 RA12)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RA12 = 2000 XU43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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