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 ]  
345842 Alexparker (2007 LG31)
Classification: Main-belt Asteroid          SPK-ID: 2345842
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0715653657951814 1.2307e-07  
a 2.691085835089145 3.2537e-08 au
q 2.49849729291476 3.5476e-07 au
i 5.980627417399161 6.552e-06 deg
node 71.99519413065408 7.6516e-05 deg
peri 259.9756258731197 9.6532e-05 deg
M .7850955359341586 5.2514e-05 deg
tp 2459196.983506981839
(2020-Dec-13.48350698)
0.00023523 TDB
period 1612.462978829353
4.41
2.9244e-05
8.007e-08
d
yr
n .22326093977138 4.0491e-09 deg/d
Q 2.883674377263531 3.4865e-08 au
  Orbit Determination Parameters
   # obs. used (total)      120  
   data-arc span      7551 days (20.67 yr)  
   first obs. used      1999-12-13  
   last obs. used      2020-08-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54106  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 08:37:36  

Additional Information
 Earth MOID = 1.49441 au 
 Jupiter MOID = 2.354 au 
 T_jup = 3.360 
[ 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 17.25   n/a E2021B25  

345842 Alexparker           Discovered 2007 June 12 by D. D. Balam at Mauna Kea.
Alex H. Parker (b. 1987) is an American astronomer whose research on asteroids and trans-neptunian objects has contributed to the understanding of solar system formation and evolution. He is the co-discoverer of several minor planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2013-11-17Last Updated: 2014-11-10
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-23 13:59 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin