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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1423705637993748 4.4944e-08  
a 3.101795333989047 2.5305e-08 au
q 2.660190983498756 1.4627e-07 au
i 22.87583434936486 5.102e-06 deg
node 166.469829522176 1.3537e-05 deg
peri 197.7989603852736 2.3593e-05 deg
M 314.4275254011565 2.1421e-05 deg
tp 2459453.091216870767
(2021-Aug-26.59121687)
0.00012031 TDB
period 1995.345630754569
5.46
2.4418e-05
6.685e-08
d
yr
n .180419870347906 2.2079e-09 deg/d
Q 3.543399684479338 2.8908e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58498  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:19  

Additional Information
 Earth MOID = 1.66101 au 
 Jupiter MOID = 1.91541 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 14.62   n/a E2021B55  
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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