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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
24068 Simonsen (1999 TR156)
Classification: Main-belt Asteroid          SPK-ID: 2024068
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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1353653712135128 5.0279e-08  
a 2.515042477907267 7.8867e-09 au
q 2.174592819267597 1.2678e-07 au
i 3.699742449799803 4.6267e-06 deg
node 59.97304021192533 5.7943e-05 deg
peri 331.1197784515535 5.9178e-05 deg
M 314.5939580880285 1.1139e-05 deg
tp 2458784.250089174131
(2019-Oct-27.75008917)
4.5144e-05 TDB
period 1456.855284389946
3.99
6.8526e-06
1.876e-08
d
yr
n .2471075911639014 1.1623e-09 deg/d
Q 2.855492136546938 8.9543e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1407  
   data-arc span      10285 days (28.16 yr)  
   first obs. used      1991-10-06  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50508  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:09:25  

Additional Information
 Earth MOID = 1.18052 au 
 Jupiter MOID = 2.56934 au 
 T_jup = 3.444 
[ 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 14.8   n/a MPO347705  
diameter diameter 3.640 km 1.293 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.133   0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

24068 Simonsen           Discovered 1999 Oct. 8 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Larry Simonsen, Jr. mentored a finalist in the 2007 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition. He teaches at the Hollenbeck Middle School, Math, Science, & Technology Magnet, Los Angeles, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071026/MPCPages.arcLast Updated: 2007-10-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-28 23:01 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin