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JPL Small-Body Database Browser
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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2520006755230456 6.7886e-08  
a 2.521167924051465 6.9875e-09 au
q 1.885831904083461 1.7257e-07 au
i 6.406998701646461 5.3854e-06 deg
node 158.5820935367124 4.4928e-05 deg
peri 207.2936539927664 4.5292e-05 deg
M 244.9420799839866 7.2483e-06 deg
tp 2459467.820792459727
(2021-Sep-10.32079246)
3.041e-05 TDB
period 1462.180832593595
4.00
6.0788e-06
1.664e-08
d
yr
n .2462075770487548 1.0236e-09 deg/d
Q 3.156503944019469 8.7484e-09 au
  Orbit Determination Parameters
   # obs. used (total)      699  
   data-arc span      9695 days (26.54 yr)  
   first obs. used      1993-10-10  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53854  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 17:50:27  

Additional Information
 Earth MOID = .886442 au 
 Jupiter MOID = 2.30549 au 
 T_jup = 3.403 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456581.5 (2013-Oct-16.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2492086825287853 6.7583e-08  
q 1.894191347151413 1.713e-07 au
tp 2456541.539582210841
(2013-Sep-06.03958221)
2.6961e-05 TDB
node 158.6300426366545 4.5014e-05 deg
peri 207.2301725925489 4.5396e-05 deg
i 6.395925875212482 5.3704e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      699  
   data-arc span      9695 days (26.54 yr)  
   first obs. used      1993-10-10  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53854  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 17:50:27  

Additional Information
 Jupiter MOID = 2.30549 au 
 T_jup = 3.403 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.567483481749965E-15 -1.157214658143987E-14 8.054927245616154E-13 7.253822468415627E-14 8.296636596606392E-14 -1.529264635556275E-14
q -1.157214658143987E-14 2.9345330350727E-14 -2.00666868655906E-12 -1.830625606388756E-13 -2.031501901634321E-13 3.887458625396831E-14
tp 8.054927245616154E-13 -2.00666868655906E-12 7.268861559441097E-10 1.875965068210404E-11 1.868119056481253E-10 -2.57963108814653E-12
node 7.253822468415627E-14 -1.830625606388756E-13 1.875965068210404E-11 2.026255850266398E-9 -2.00971949129114E-9 1.603585602684388E-10
peri 8.296636596606392E-14 -2.031501901634321E-13 1.868119056481253E-10 -2.00971949129114E-9 2.060788419829325E-9 -1.599545882684071E-10
i -1.529264635556275E-14 3.887458625396831E-14 -2.57963108814653E-12 1.603585602684388E-10 -1.599545882684071E-10 2.884167299262095E-11

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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