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JPL Small-Body Database Browser
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117921 (4621 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2117921
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1974098017697618 5.0971e-08  
a 2.372482199237806 1.103e-08 au
q 1.904130958583983 1.1824e-07 au
i 1.694265414387506 4.6796e-06 deg
node 155.2938539216351 0.00019034 deg
peri 199.2626154932725 0.00019085 deg
M 125.4428143657786 1.4912e-05 deg
tp 2458535.400193277013
(2019-Feb-20.90019328)
5.3886e-05 TDB
period 1334.759039541708
3.65
9.308e-06
2.548e-08
d
yr
n .2697116028699882 1.8808e-09 deg/d
Q 2.840833439891631 1.3207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      413  
   data-arc span      21663 days (59.31 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54979  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:51:47  

Additional Information
 Earth MOID = .899355 au 
 Jupiter MOID = 2.59858 au 
 T_jup = 3.517 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456688.5 (2014-Jan-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1987554981340015 5.1222e-08  
q 1.900076860752156 1.1899e-07 au
tp 2457199.431128406220
(2015-Jun-25.93112841)
4.9926e-05 TDB
node 155.3281320765277 0.0001903 deg
peri 198.9903123284595 0.0001908 deg
i 1.69393019613193 4.684e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      413  
   data-arc span      21663 days (59.31 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54979  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:51:47  

Additional Information
 Jupiter MOID = 2.59858 au 
 T_jup = 3.517 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.623707880924248E-15 -6.080190087539763E-15 7.911966925284757E-13 -4.476538331216244E-15 1.124519702387691E-13 -1.396649593834773E-15
q -6.080190087539763E-15 1.415884367477894E-14 -1.760864511371186E-12 1.221734670473549E-14 -2.509673246774386E-13 3.262760850989973E-15
tp 7.911966925284757E-13 -1.760864511371186E-12 2.492634493295252E-9 1.243826303358771E-11 7.112809993017368E-10 -1.83716705676334E-12
node -4.476538331216244E-15 1.221734670473549E-14 1.243826303358771E-11 3.621363115173741E-8 -3.619353814361285E-8 2.090455142217133E-10
peri 1.124519702387691E-13 -2.509673246774386E-13 7.112809993017368E-10 -3.619353814361285E-8 3.640486357672466E-8 -2.094443934347806E-10
i -1.396649593834773E-15 3.262760850989973E-15 -1.83716705676334E-12 2.090455142217133E-10 -2.094443934347806E-10 2.194002545019766E-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 16.7   n/a MPO406908  

117921 (4621 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 4621 P-L = 1982 UC5 = 2000 QL14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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