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4604 Stekarstrom (1987 SK)
Classification: Main-belt Asteroid          SPK-ID: 2004604
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1288867161580287 5.5612e-08  
a 2.175562814550076 1.1857e-08 AU
q 1.895161667587198 1.1873e-07 AU
i 1.409729043642433 5.5737e-06 deg
node .05462670697313364 0.00020731 deg
peri 355.4793830781966 0.00020819 deg
M 120.1974027108875 2.2822e-05 deg
tp 2456409.165217853565
(2013-Apr-26.66521785)
7.2918e-05 JED
period 1172.076254522558
3.21
9.5818e-06
2.623e-08
d
yr
n .3071472513933362 2.511e-09 deg/d
Q 2.455963961512954 1.3385e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1206  
   data-arc span      15500 days (42.44 yr)  
   first obs. used      1971-10-11  
   last obs. used      2014-03-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50885  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:03:38  

Additional Information
 Earth MOID = .889059 AU 
 T_jup = 3.674 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9 mag n/a MPO240232  
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 | Physical Parameters | Discovery Circumstances ]
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