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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1847922293028594 4.8192e-08  
a 2.663294036216939 1.7803e-08 au
q 2.1711379939754 1.23e-07 au
i 13.30249077526536 4.4577e-06 deg
node 120.0600168587785 2.3757e-05 deg
peri 173.9535362429642 2.9796e-05 deg
M 111.6219940465431 2.2288e-05 deg
tp 2458708.262861300861
(2019-Aug-12.76286130)
9.4852e-05 TDB
period 1587.548864767642
4.35
1.5918e-05
4.358e-08
d
yr
n .2267646735098706 2.2737e-09 deg/d
Q 3.155450078458478 2.1093e-08 au
  Orbit Determination Parameters
   # obs. used (total)      592  
   data-arc span      10045 days (27.50 yr)  
   first obs. used      1993-07-13  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52551  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:24:30  

Additional Information
 Earth MOID = 1.15362 au 
 Jupiter MOID = 2.07066 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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