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
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 ]  
4604 Stekarstrom (1987 SK)
Classification: Main-belt Asteroid          SPK-ID: 2004604
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .12871545206581 3.9441e-08  
a 2.175048139649697 4.8521e-09 au
q 1.895085835089787 8.584e-08 au
i 1.408393346773174 4.3078e-06 deg
node 359.9681490644982 0.00012165 deg
peri 355.5123736802572 0.00012228 deg
M 76.25346778462506 1.1751e-05 deg
tp 2458752.324540152973
3.8238e-05 TDB
period 1171.660360382244
n .3072562767955665 1.0281e-09 deg/d
Q 2.455010444209607 5.4766e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2197  
   data-arc span      17647 days (48.31 yr)  
   first obs. used      1971-10-11  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49128  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:17:09  

Additional Information
 Earth MOID = .890328 au 
 Jupiter MOID = 2.95722 au 
 T_jup = 3.674 
[ 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 14.0   n/a MPO337290  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4604 Stekarstrom           Discovered 1987 Sept. 18 by K. Suzuki and T. Urata at Toyota.
Stephen E. (b. 1942) and Karen M. Strom (b. 1941) are American astronomers and photographers, well known for their research on the formation of stars and planetary systems and for their photography of the U.S. southwest culture and desert landscape. The name was suggested by E. Mamajek.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090409/MPCPages.arcLast Updated: 2009-04-10

Alternate Designations
 1987 SK = 1971 TC1 = 1979 BC2 = 1984 UY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-May-28 19:18 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin