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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09617052720929535 5.5086e-08  
a 3.162463199270942 2.3953e-08 au
q 2.858327446117061 1.8056e-07 au
i 8.977834130633711 5.8455e-06 deg
node 347.822123345959 2.9548e-05 deg
peri 50.290214202713 3.9534e-05 deg
M 203.5084396202571 2.821e-05 deg
tp 2459893.445735862025
(2022-Nov-09.94573586)
0.00016699 TDB
period 2054.17125454096
5.62
2.3338e-05
6.39e-08
d
yr
n .1752531582769365 1.9911e-09 deg/d
Q 3.466598952424823 2.6256e-08 au
  Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      7619 days (20.86 yr)  
   first obs. used      1999-08-12  
   last obs. used      2020-06-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52413  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:45  

Additional Information
 Earth MOID = 1.8748 au 
 Jupiter MOID = 1.98364 au 
 T_jup = 3.178 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456934.5 (2014-Oct-04.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09716968576406275 5.4791e-08  
q 2.855042489891206 1.7951e-07 au
tp 2457843.927294824198
(2017-Mar-31.42729482)
0.00015331 TDB
node 347.8545476965913 2.9552e-05 deg
peri 51.14893258959182 3.9476e-05 deg
i 8.977993220050431 5.8458e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      7619 days (20.86 yr)  
   first obs. used      1999-08-12  
   last obs. used      2020-06-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52413  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:45  

Additional Information
 Jupiter MOID = 1.98364 au 
 T_jup = 3.178 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.002074352064985E-15 -9.766850170050173E-15 -2.892963530562384E-12 1.959800657793572E-16 -5.395793735855698E-13 -3.634667123135875E-16
q -9.766850170050173E-15 3.222376555850178E-14 1.08168909573774E-11 -1.993744133164587E-15 1.955866265871558E-12 2.372072296960197E-15
tp -2.892963530562384E-12 1.08168909573774E-11 2.35039027602969E-8 -2.593794861587934E-11 4.027985522537123E-9 -2.202331561665019E-12
node 1.959800657793572E-16 -1.993744133164587E-15 -2.593794861587934E-11 8.733030753568684E-10 -8.666189278006066E-10 5.497050836250874E-11
peri -5.395793735855698E-13 1.955866265871558E-12 4.027985522537123E-9 -8.666189278006066E-10 1.558389187133962E-9 -5.475407347643375E-11
i -3.634667123135875E-16 2.372072296960197E-15 -2.202331561665019E-12 5.497050836250874E-11 -5.475407347643375E-11 3.417345911156241E-11

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 14.1   n/a MPC35474  
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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