Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
21072 (1991 PU8)
Classification: Main-belt Asteroid          SPK-ID: 2021072
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1605461669409171 6.7422e-08  
a 2.575311219690848 2.2536e-08 AU
q 2.161854874689545 1.7953e-07 AU
i 6.77228347863079 5.6344e-06 deg
node 288.7974022283911 6.8111e-05 deg
peri 330.072758851144 7.2828e-05 deg
M 277.941829202823 2.8084e-05 deg
tp 2457344.582303995645
(2015-Nov-18.08230400)
0.00011774 JED
period 1509.534373421514
4.13
1.9814e-05
5.425e-08
d
yr
n .2384841354649137 3.1303e-09 deg/d
Q 2.988767564692152 2.6154e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      625  
   data-arc span      8675 days (23.75 yr)  
   first obs. used      1991-08-05  
   last obs. used      2015-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51149  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:37  

Additional Information
 Earth MOID = 1.15103 AU 
 T_jup = 3.400 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5 mag n/a MPO240375  

21072 (1991 PU8)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 PU8 = 2000 WB54 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Aug-03 04:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin