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JPL Small-Body Database Browser
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9325 Stonehenge (1989 GG4)
Classification: Main-belt Asteroid          SPK-ID: 2009325
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06600840736847903 4.1216e-08  
a 2.428644281295842 9.1187e-09 au
q 2.268333340222939 1.0062e-07 au
i 5.897855314245373 3.7687e-06 deg
node 211.5329007420072 4.012e-05 deg
peri 301.8133797509541 5.0601e-05 deg
M 11.5743273356573 2.9063e-05 deg
tp 2458556.053501745897
(2019-Mar-13.55350175)
0.00011166 TDB
period 1382.433631558286
3.78
7.7859e-06
2.132e-08
d
yr
n .260410331304083 1.4666e-09 deg/d
Q 2.588955222368746 9.7207e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2165  
   data-arc span      17964 days (49.18 yr)  
   first obs. used      1970-03-04  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46831  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:41:25  

Additional Information
 Earth MOID = 1.28429 au 
 Jupiter MOID = 2.40726 au 
 T_jup = 3.499 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7   n/a MPO458921  
rotation period rot_per 4.607 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

9325 Stonehenge           Discovered 1989 Apr. 3 by E. W. Elst at the European Southern Observatory.
Stonehenge, a prehistoric circular complex of large standing stones, is located north of the city of Salisbury, England. Some parts of Stonehenge may have been used for astronomical observation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071124/MPCPages.arcLast Updated: 2007-11-26

[ show close-approach data ]
Alternate Designations
 1989 GG4 = 1970 EM2 = 1993 KF2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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