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101911 (1999 RN9)
Classification: Main-belt Asteroid          SPK-ID: 2101911
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1425926589319018 4.4866e-08  
a 3.100349252467851 2.4762e-08 au
q 2.658262208940926 1.4598e-07 au
i 22.86472972976607 5.1013e-06 deg
node 166.5193513107543 1.3549e-05 deg
peri 198.002317785102 2.3639e-05 deg
M 278.1254004048768 2.1251e-05 deg
tp 2459453.983035056883
(2021-Aug-27.48303506)
0.00012041 TDB
period 1993.950424524603
5.46
2.3888e-05
6.54e-08
d
yr
n .1805461136707203 2.163e-09 deg/d
Q 3.542436295994775 2.8292e-08 au
  Orbit Determination Parameters
   # obs. used (total)      546  
   data-arc span      7659 days (20.97 yr)  
   first obs. used      1999-09-04  
   last obs. used      2020-08-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58501  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:49  

Additional Information
 Earth MOID = 1.66095 au 
 Jupiter MOID = 1.91611 au 
 T_jup = 3.086 
[ 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 14.6   n/a MPO474893  
diameter diameter 6.673 km 0.341 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101911 (1999 RN9)          Discovered 1999-Sep-04 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 RN9 = 2002 DY12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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