Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2519553006147294 6.0701e-08  
a 2.522024010930384 6.9614e-09 au
q 1.886586693098854 1.5471e-07 au
i 6.407118418511102 4.7808e-06 deg
node 158.57095860 4.2735e-05 deg
peri 207.2250263133453 4.3035e-05 deg
M 294.2577191146077 7.2644e-06 deg
tp 2459467.655745791067
(2021-Sep-10.15574579)
3.01e-05 TDB
period 1462.925642212604
4.01
6.057e-06
1.658e-08
d
yr
n .2460822270197667 1.0189e-09 deg/d
Q 3.157461328761914 8.7153e-09 au
  Orbit Determination Parameters
   # obs. used (total)      739  
   data-arc span      9752 days (26.70 yr)  
   first obs. used      1993-10-10  
   last obs. used      2020-06-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53981  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:30:55  

Additional Information
 Earth MOID = .885588 au 
 Jupiter MOID = 2.30544 au 
 T_jup = 3.402 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456928.5 (2014-Sep-28.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2496279505614399 6.0542e-08  
q 1.894429972221883 1.5389e-07 au
tp 2456541.937207518933
(2013-Sep-06.43720752)
2.6171e-05 TDB
node 158.59835570072 4.2786e-05 deg
peri 207.3881343718373 4.3103e-05 deg
i 6.39846136800775 4.7689e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      739  
   data-arc span      9752 days (26.70 yr)  
   first obs. used      1993-10-10  
   last obs. used      2020-06-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53981  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:30:55  

Additional Information
 Jupiter MOID = 2.30544 au 
 T_jup = 3.402 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.665326981182864E-15 -9.312073829554766E-15 7.631881785660029E-13 7.927988705649617E-14 9.839369741281096E-14 -6.481291486770548E-15
q -9.312073829554766E-15 2.368358700000454E-14 -1.901845051020908E-12 -2.033400968466468E-13 -2.387146351290223E-13 1.633359840938093E-14
tp 7.631881785660029E-13 -1.901845051020908E-12 6.849372577049229E-10 2.137426207833878E-11 1.68308113791755E-10 -1.065307138829666E-12
node 7.927988705649617E-14 -2.033400968466468E-13 2.137426207833878E-11 1.830614339290071E-9 -1.814303972415528E-9 1.315686752450428E-10
peri 9.839369741281096E-14 -2.387146351290223E-13 1.68308113791755E-10 -1.814303972415528E-9 1.857843022686821E-9 -1.310744183023108E-10
i -6.481291486770548E-15 1.633359840938093E-14 -1.065307138829666E-12 1.315686752450428E-10 -1.310744183023108E-10 2.274286949519481E-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 16.37   n/a E2021B55  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-23 00:33 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin