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101925 (1999 RK18)
Classification: Main-belt Asteroid          SPK-ID: 2101925
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2169836846194043 3.1746e-08  
a 2.351130121319658 9.1725e-09 au
q 1.840973244576051 7.7228e-08 au
i 10.93774591996878 5.1328e-06 deg
node .9890810022937776 1.6697e-05 deg
peri 289.5622522529077 2.0592e-05 deg
M 306.9926394348337 1.1537e-05 deg
tp 2459194.386291504917
(2020-Dec-10.88629150)
4.2334e-05 TDB
period 1316.78061683453
3.61
7.7058e-06
2.11e-08
d
yr
n .2733940607854789 1.5999e-09 deg/d
Q 2.861286998063265 1.1163e-08 au
  Orbit Determination Parameters
   # obs. used (total)      813  
   data-arc span      7564 days (20.71 yr)  
   first obs. used      1999-09-07  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50109  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:45  

Additional Information
 Earth MOID = .859615 au 
 Jupiter MOID = 2.43926 au 
 T_jup = 3.502 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457509.5 (2016-May-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2167152188371574 3.1724e-08  
q 1.842678494897491 7.7151e-08 au
tp 2457876.560285040866
(2017-May-03.06028504)
4.2075e-05 TDB
node 1.012727838418875 1.6693e-05 deg
peri 289.3473886413389 2.0597e-05 deg
i 10.93763710505699 5.1323e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      813  
   data-arc span      7564 days (20.71 yr)  
   first obs. used      1999-09-07  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50109  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:45  

Additional Information
 Jupiter MOID = 2.43926 au 
 T_jup = 3.502 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.006443256192461E-15 -2.437935971431349E-15 4.688160470289556E-13 -2.665572079303586E-15 1.524639531055028E-13 1.514953660994215E-15
q -2.437935971431349E-15 5.952312344595522E-15 -1.111252063364172E-12 5.232069078270838E-15 -3.651753749916316E-13 -3.420289658529643E-15
tp 4.688160470289556E-13 -1.111252063364172E-12 1.770309055503656E-9 -1.272050454807432E-11 5.129169925549371E-10 1.310874695528378E-12
node -2.665572079303586E-15 5.232069078270838E-15 -1.272050454807432E-11 2.786603365618875E-10 -2.766483163641011E-10 -2.728186077440755E-12
peri 1.524639531055028E-13 -3.651753749916316E-13 5.129169925549371E-10 -2.766483163641011E-10 4.242565031638679E-10 3.031198966428005E-12
i 1.514953660994215E-15 -3.420289658529643E-15 1.310874695528378E-12 -2.728186077440755E-12 3.031198966428005E-12 2.634100277826723E-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 15.8   n/a MPO366392  
diameter diameter 1.756 km 0.425 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.362   0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101925 (1999 RK18)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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