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 ]  
100326 (1995 OR4)
Classification: Main-belt Asteroid          SPK-ID: 2100326
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0751883508489908 4.5866e-08  
a 2.944262517368031 1.903e-08 au
q 2.722888274220631 1.4084e-07 au
i 2.702075411137867 4.7515e-06 deg
node 138.6469285960293 8.1764e-05 deg
peri 188.5769411713018 8.6316e-05 deg
M 331.3778932508598 2.6159e-05 deg
tp 2459147.210878755683
(2020-Oct-24.71087876)
0.0001341 TDB
period 1845.284025210074
5.05
1.789e-05
4.898e-08
d
yr
n .1950919181446966 1.8915e-09 deg/d
Q 3.165636760515432 2.0461e-08 au
  Orbit Determination Parameters
   # obs. used (total)      562  
   data-arc span      21860 days (59.85 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52525  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 09:02:43  

Additional Information
 Earth MOID = 1.71121 au 
 Jupiter MOID = 2.08494 au 
 T_jup = 3.266 
[ 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 15.5   n/a MPO436467  

100326 (1995 OR4)          Discovered 1995-Jul-22 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1995 OR4 = 2000 QH40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-21 02:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin