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101921 (1999 RT15)
Classification: Main-belt Asteroid          SPK-ID: 2101921
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09580124118339094 5.4713e-08  
a 3.164150246464093 2.3649e-08 au
q 2.861020725562101 1.7955e-07 au
i 8.977675073354209 5.8211e-06 deg
node 347.8029364701724 2.885e-05 deg
peri 50.04122395099878 3.902e-05 deg
M 238.8288607447093 2.8439e-05 deg
tp 2459892.459638770415
(2022-Nov-08.95963877)
0.00016716 TDB
period 2055.815200619009
5.63
2.3048e-05
6.31e-08
d
yr
n .1751130159420961 1.9632e-09 deg/d
Q 3.467279767366085 2.5915e-08 au
  Orbit Determination Parameters
   # obs. used (total)      972  
   data-arc span      7619 days (20.86 yr)  
   first obs. used      1999-08-12  
   last obs. used      2020-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52597  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:24  

Additional Information
 Earth MOID = 1.8762 au 
 Jupiter MOID = 1.98264 au 
 T_jup = 3.178 
[ 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 14.12   n/a E2021B55  
diameter diameter 8.839 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101921 (1999 RT15)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 RT15 = 2000 XW24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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