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 ]  
187685 (2008 DO21)
Classification: Main-belt Asteroid          SPK-ID: 2187685
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09271569316608486 4.9887e-08  
a 2.245313432587166 1.3197e-08 au
q 2.037137641309726 1.1489e-07 au
i 3.217535756425753 6.2001e-06 deg
node 160.8239885264464 0.00011566 deg
peri 336.7494224529061 0.00012257 deg
M 313.432111627928 3.9836e-05 deg
tp 2459359.463689159286
(2021-May-24.96368916)
0.00013602 TDB
period 1228.892485742674
3.36
1.0834e-05
2.966e-08
d
yr
n .2929467013401388 2.5828e-09 deg/d
Q 2.453489223864606 1.4421e-08 au
  Orbit Determination Parameters
   # obs. used (total)      198  
   data-arc span      8321 days (22.78 yr)  
   first obs. used      1998-04-03  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .64175  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:56:25  

Additional Information
 Earth MOID = 1.05082 au 
 Jupiter MOID = 2.55443 au 
 T_jup = 3.624 
[ 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 17.7   n/a MPO436929  

187685 (2008 DO21)          Discovered 2008-Feb-28 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-17 03:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin