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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1228906658939946 3.7911e-08  
a 2.804368632331137 1.572e-08 au
q 2.459737903691733 1.0481e-07 au
i 23.83244961411741 6.4401e-06 deg
node 332.4915162250026 9.7523e-06 deg
peri 77.61948326237524 3.0457e-05 deg
M 169.8723984980904 2.6668e-05 deg
tp 2458587.084724876242
(2019-Apr-13.58472488)
0.00012674 TDB
period 1715.343408469202
4.70
1.4423e-05
3.949e-08
d
yr
n .2098705123548814 1.7647e-09 deg/d
Q 3.148999360970542 1.7652e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1062  
   data-arc span      10642 days (29.14 yr)  
   first obs. used      1992-02-25  
   last obs. used      2021-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48878  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:17:33  

Additional Information
 Earth MOID = 1.5714 au 
 Jupiter MOID = 2.29374 au 
 T_jup = 3.188 
[ 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 14.51   n/a MPCxxxxx  
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

Alternate Designations
 1999 RA12 = 2000 XU43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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