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100121 (1993 OP7)
Classification: Main-belt Asteroid          SPK-ID: 2100121
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1848815983228634 5.9552e-08  
a 2.662790347241281 1.9583e-08 au
q 2.170489411844621 1.5656e-07 au
i 13.30253659886142 7.3348e-06 deg
node 120.0599565105458 3.1904e-05 deg
peri 173.8947912811222 3.8857e-05 deg
M 66.31544778391675 2.4714e-05 deg
tp 2458708.141251934043
(2019-Aug-12.64125193)
0.00010733 TDB
period 1587.098524112961
4.35
1.7508e-05
4.793e-08
d
yr
n .2268290181929355 2.5022e-09 deg/d
Q 3.155091282637942 2.3203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      472  
   data-arc span      9018 days (24.69 yr)  
   first obs. used      1993-07-13  
   last obs. used      2018-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55585  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 03:56:20  

Additional Information
 Earth MOID = 1.15495 au 
 Jupiter MOID = 2.07136 au 
 T_jup = 3.322 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4   n/a MPO436466  
diameter diameter 4.683 km 0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.050   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

100121 (1993 OP7)          Discovered 1993-Jul-20 by Elst, E. W. at La Silla
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1993 OP7 = 1997 JP9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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