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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1971843619659369 5.1703e-08  
a 2.372232222627955 1.1076e-08 au
q 1.904465125374025 1.2022e-07 au
i 1.694150726202362 4.8533e-06 deg
node 155.3018614219207 0.00019466 deg
peri 199.2427974305782 0.00019519 deg
M 17.58663649078677 1.4722e-05 deg
tp 2458535.304966294703
(2019-Feb-20.80496629)
5.4396e-05 TDB
period 1334.548089749982
3.65
9.3469e-06
2.559e-08
d
yr
n .2697542357334186 1.8893e-09 deg/d
Q 2.839999319881884 1.3261e-08 au
  Orbit Determination Parameters
   # obs. used (total)      394  
   data-arc span      21104 days (57.78 yr)  
   first obs. used      1960-09-24  
   last obs. used      2018-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5598  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:53:55  

Additional Information
 Earth MOID = .898785 au 
 Jupiter MOID = 2.59575 au 
 T_jup = 3.517 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456595.5 (2013-Oct-30.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1988326014863294 5.1949e-08  
q 1.899738858775895 1.2095e-07 au
tp 2457199.432725027641
(2015-Jun-25.93272503)
5.0532e-05 TDB
node 155.3295886467656 0.0001946 deg
peri 199.0050445769542 0.00019511 deg
i 1.693986649433844 4.8583e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      394  
   data-arc span      21104 days (57.78 yr)  
   first obs. used      1960-09-24  
   last obs. used      2018-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5598  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:53:55  

Additional Information
 Jupiter MOID = 2.59575 au 
 T_jup = 3.517 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.6987136149839E-15 -6.267848639118206E-15 8.610660234694552E-13 -8.128139184842323E-15 1.429189973002209E-13 -1.601262058582572E-15
q -6.267848639118206E-15 1.462864317357479E-14 -1.936991425373532E-12 2.13979280528913E-14 -3.277912716340597E-13 3.779327082060705E-15
tp 8.610660234694552E-13 -1.936991425373532E-12 2.5534801821442E-9 1.350654066384228E-11 7.341338284261789E-10 -1.880966399814679E-12
node -8.128139184842323E-15 2.13979280528913E-14 1.350654066384228E-11 3.78684837334628E-8 -3.784735054795598E-8 2.612650170128879E-10
peri 1.429189973002209E-13 -3.277912716340597E-13 7.341338284261789E-10 -3.784735054795598E-8 3.80669963590772E-8 -2.616618337464086E-10
i -1.601262058582572E-15 3.779327082060705E-15 -1.880966399814679E-12 2.612650170128879E-10 -2.616618337464086E-10 2.3602827185099E-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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