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15646 (4555 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2015646
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2211063662584815 3.3137e-08  
a 2.400921981391804 7.037e-09 au
q 1.870062846416149 8.0405e-08 au
i 2.461488255884971 3.6153e-06 deg
node 167.7950143117047 9.7862e-05 deg
peri 182.3884578211742 9.8314e-05 deg
M 22.50215887232609 9.9565e-06 deg
tp 2458915.564903534735
(2020-Mar-07.06490353)
3.7412e-05 TDB
period 1358.831163755568
3.72
5.974e-06
1.636e-08
d
yr
n .2649335764459684 1.1648e-09 deg/d
Q 2.931781116367459 8.5929e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1078  
   data-arc span      21951 days (60.10 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5049  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:32:17  

Additional Information
 Earth MOID = .864052 au 
 Jupiter MOID = 2.50019 au 
 T_jup = 3.491 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456874.5 (2014-Aug-05.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2220609500234673 3.327e-08  
q 1.867556136631318 8.0862e-08 au
tp 2456199.168844125067
(2012-Sep-28.66884413)
3.385e-05 TDB
node 167.8526693892269 9.7852e-05 deg
peri 182.5829113897217 9.83e-05 deg
i 2.461684384402062 3.6174e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1078  
   data-arc span      21951 days (60.10 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5049  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:32:17  

Additional Information
 Jupiter MOID = 2.50019 au 
 T_jup = 3.491 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.106871406720086E-15 -2.684242974986854E-15 4.354498350920773E-13 -1.827912447021939E-15 1.391319277686555E-13 -2.204656848713328E-16
q -2.684242974986854E-15 6.538651011224453E-15 -1.027084385877021E-12 6.571517637690673E-15 -3.277259431325818E-13 6.490089969966168E-16
tp 4.354498350920773E-13 -1.027084385877021E-12 1.145855628327484E-9 4.613174455178067E-12 3.375425416031663E-10 2.217956136856378E-13
node -1.827912447021939E-15 6.571517637690673E-15 4.613174455178067E-12 9.575102467712741E-9 -9.564094453397249E-9 1.134963215534088E-10
peri 1.391319277686555E-13 -3.277259431325818E-13 3.375425416031663E-10 -9.564094453397249E-9 9.662911211801167E-9 -1.133271819301579E-10
i -2.204656848713328E-16 6.490089969966168E-16 2.217956136856378E-13 1.134963215534088E-10 -1.133271819301579E-10 1.308565659551539E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO435845  

15646 (4555 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 4555 P-L = 1992 EK31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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