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101969 (1999 RJ45)
Classification: Mars-crossing Asteroid          SPK-ID: 2101969
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4452912352954425 4.2084e-08  
a 2.862592195137213 1.6001e-08 au
q 1.587904980417471 1.1733e-07 au
i 15.07262157901349 5.3397e-06 deg
node 125.1287619403655 1.6582e-05 deg
peri 243.6219775719084 1.9603e-05 deg
M 134.2017354502044 1.786e-05 deg
tp 2458541.032674703938
(2019-Feb-26.53267470)
8.2943e-05 TDB
period 1769.039992740427
4.84
1.4832e-05
4.061e-08
d
yr
n .2035002043353031 1.7062e-09 deg/d
Q 4.137279409856955 2.3126e-08 au
  Orbit Determination Parameters
   # obs. used (total)      795  
   data-arc span      13341 days (36.53 yr)  
   first obs. used      1984-08-26  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52862  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:40  

Additional Information
 Earth MOID = .647355 au 
 Jupiter MOID = 1.63094 au 
 T_jup = 3.100 
[ 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 14.84   n/a E2021B55  
diameter diameter 5.761 km 1.719 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.064   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

101969 (1999 RJ45)          Discovered 1999-Sep-13 by McNaught, R. H. at Siding Spring
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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