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18503 (1996 PY4)
Classification: Main-belt Asteroid          SPK-ID: 2018503
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2628995659695805 2.9814e-08  
a 2.361517952301568 9.8429e-09 au
q 1.740675907612113 7.2615e-08 au
i 23.87856016637873 3.8947e-06 deg
node 151.3296077649025 8.4808e-06 deg
peri 69.52098943730014 1.1604e-05 deg
M 281.3514807750017 9.9032e-06 deg
tp 2459290.083193727520
(2021-Mar-16.58319373)
3.7634e-05 TDB
period 1325.517006158351
3.63
8.2872e-06
2.269e-08
d
yr
n .271592139766929 1.698e-09 deg/d
Q 2.982359996991023 1.2431e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1691  
   data-arc span      11680 days (31.98 yr)  
   first obs. used      1988-02-11  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47315  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:27:14  

Additional Information
 Earth MOID = .864088 au 
 Jupiter MOID = 2.28906 au 
 T_jup = 3.392 
[ 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 14.1   n/a MPO458993  
diameter diameter 3.529 km 0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.4390 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2010) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.429   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18503 (1996 PY4)          Discovered 1996-Aug-15 by JPL/GEODSS NEAT at Haleakala
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 PY4 = 1988 DL1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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