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 ]  
101382 (1998 UN21)
Classification: Main-belt Asteroid          SPK-ID: 2101382
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1428784526158288 4.3686e-08  
a 2.339007901403247 1.4047e-08 au
q 2.004814071794554 1.002e-07 au
i 7.582272563226629 5.809e-06 deg
node 61.89318412917726 3.5669e-05 deg
peri 263.0661139845918 4.2198e-05 deg
M 111.5557946337718 2.5933e-05 deg
tp 2458795.611358436011
(2019-Nov-08.11135844)
9.2416e-05 TDB
period 1306.609947439784
3.58
1.177e-05
3.222e-08
d
yr
n .2755221638296848 2.482e-09 deg/d
Q 2.67320173101194 1.6054e-08 au
  Orbit Determination Parameters
   # obs. used (total)      633  
   data-arc span      8180 days (22.40 yr)  
   first obs. used      1998-09-21  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61173  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:36:32  

Additional Information
 Earth MOID = 1.00802 au 
 Jupiter MOID = 2.64442 au 
 T_jup = 3.540 
[ 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 15.8   n/a MPO436474  

101382 (1998 UN21)          Discovered 1998-Oct-28 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 UN21 = 2002 XC77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-21 15:18 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin