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100168 (1993 UN4)
Classification: Main-belt Asteroid          SPK-ID: 2100168
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2520006732668897 7.6829e-08  
a 2.521167926608759 6.9905e-09 au
q 1.885831911684463 1.9488e-07 au
i 6.407001316036284 5.7133e-06 deg
node 158.5821129233519 4.5079e-05 deg
peri 207.2936150872239 4.5544e-05 deg
M 244.9420906396929 7.2581e-06 deg
tp 2459467.820749891393
(2021-Sep-10.32074989)
3.0445e-05 TDB
period 1462.180834818294
4.00
6.0813e-06
1.665e-08
d
yr
n .2462075766741516 1.024e-09 deg/d
Q 3.156503941533054 8.7521e-09 au
  Orbit Determination Parameters
   # obs. used (total)      672  
   data-arc span      9310 days (25.49 yr)  
   first obs. used      1993-10-10  
   last obs. used      2019-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53753  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:07:20  

Additional Information
 Earth MOID = .886442 au 
 Jupiter MOID = 2.30549 au 
 T_jup = 3.403 
[ 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 16.4   n/a MPO432530  
diameter diameter 1.441 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.281   0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100168 (1993 UN4)          Discovered 1993-Oct-20 by Elst, E. W. at La Silla
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1993 UN4 = 2001 SZ54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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