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15644 (4157 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2015644
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1587882597676425 3.8795e-08  
a 2.273656479358818 6.2557e-09 au
q 1.912626523692007 8.7917e-08 au
i 2.181482608404307 4.2928e-06 deg
node 304.6447033416272 0.00010837 deg
peri 186.6933668618834 0.00010928 deg
M 33.74943156160258 1.2548e-05 deg
tp 2458883.104983301125
(2020-Feb-03.60498330)
4.3658e-05 TDB
period 1252.234602365204
3.43
5.168e-06
1.415e-08
d
yr
n .2874860663649102 1.1865e-09 deg/d
Q 2.63468643502563 7.249e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1375  
   data-arc span      21793 days (59.67 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52326  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:32:18  

Additional Information
 Earth MOID = .927246 au 
 Jupiter MOID = 2.40887 au 
 T_jup = 3.593 
[ show covariance matrix ]

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 15.4   n/a MPO502289  
diameter diameter 5.395 km 0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15644 (4157 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

[ show close-approach data ]
Alternate Designations
 4157 P-L = 1994 PO4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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