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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06688532193177675 5.1329e-08  
a 2.429167362846899 1.4448e-08 AU
q 2.266691721756719 1.2578e-07 AU
i 5.895153687280768 5.5082e-06 deg
node 211.5866014137499 4.8827e-05 deg
peri 302.1019284360389 6.5312e-05 deg
M 314.7235168797406 4.2073e-05 deg
tp 2457174.422098860350
(2015-May-31.92209886)
0.00016152 JED
period 1382.880278563638
3.79
1.2338e-05
3.378e-08
d
yr
n .2603262231593344 2.3226e-09 deg/d
Q 2.591643003937079 1.5415e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1385  
   data-arc span      16519 days (45.23 yr)  
   first obs. used      1970-03-04  
   last obs. used      2015-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49829  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:05:00  

Additional Information
 Earth MOID = 1.28283 AU 
 T_jup = 3.498 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6 mag n/a MPO319202  
rotation period rot_per 4.6072 h n/a LCDB (Rev. 2015-July); 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., in press.]

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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