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9237 (1997 GY7)
Classification: Main-belt Asteroid          SPK-ID: 2009237
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1185072823517728 3.1773e-08  
a 2.681218472664785 1.1034e-08 au
q 2.36347455807791 8.4672e-08 au
i 1.610466750089708 3.4769e-06 deg
node 95.74908765901952 0.00013412 deg
peri 15.82982264442589 0.00013508 deg
M 189.8316837997075 1.7146e-05 deg
tp 2459758.506503850335
(2022-Jun-28.00650385)
7.8272e-05 TDB
period 1603.60252413223
4.39
9.8988e-06
2.71e-08
d
yr
n .2244945331417519 1.3858e-09 deg/d
Q 2.998962387251659 1.2341e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1891  
   data-arc span      15627 days (42.78 yr)  
   first obs. used      1977-10-18  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50939  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:06:05  

Additional Information
 Earth MOID = 1.38014 au 
 Jupiter MOID = 2.09402 au 
 T_jup = 3.366 
[ 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 13.9   n/a MPO384839  
diameter diameter 4.573 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.072 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.179   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9237 (1997 GY7)          Discovered 1997-Apr-02 by LINEAR at Socorro
Reference: 19980910/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1997 GY7 = 1977 UN4 = 1992 DT13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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