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65538 (7561 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2065538
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2025954660255707 5.5542e-08  
a 2.694547530778264 1.8624e-08 au
q 2.148644418052191 1.4682e-07 au
i 12.24848359021714 5.6277e-06 deg
node 12.90051393102915 2.4018e-05 deg
peri 293.6085684877888 2.8787e-05 deg
M 216.8242432243159 2.1845e-05 deg
tp 2459643.031149153550
(2022-Mar-04.53114915)
0.00010284 TDB
period 1615.575282466832
4.42
1.6749e-05
4.586e-08
d
yr
n .2228308416865067 2.3102e-09 deg/d
Q 3.240450643504337 2.2397e-08 au
  Orbit Determination Parameters
   # obs. used (total)      479  
   data-arc span      21754 days (59.56 yr)  
   first obs. used      1960-09-27  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55184  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 12:52:01  

Additional Information
 Earth MOID = 1.16903 au 
 Jupiter MOID = 2.19002 au 
 T_jup = 3.308 
[ 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 15.2   n/a MPO502571  

65538 (7561 P-L)          Discovered 1960-Oct-17 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 7561 P-L = 2000 SP169 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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