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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1191984201207794 3.1156e-08  
a 2.678803596881369 1.0556e-08 au
q 2.359494440319249 8.3138e-08 au
i 1.610217432547733 3.3282e-06 deg
node 95.74217576191297 0.00012557 deg
peri 16.21825239814089 0.00012648 deg
M 234.3320011365945 1.6761e-05 deg
tp 2459759.525907933372
(2022-Jun-29.02590793)
7.6193e-05 TDB
period 1601.436552473166
4.38
9.4657e-06
2.592e-08
d
yr
n .2247981660241467 1.3287e-09 deg/d
Q 2.99811275344349 1.1814e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2048  
   data-arc span      15729 days (43.06 yr)  
   first obs. used      1977-10-18  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49991  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:15:41  

Additional Information
 Earth MOID = 1.37603 au 
 Jupiter MOID = 2.09345 au 
 T_jup = 3.367 
[ 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 13.89   n/a E2021B10  
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. 2020-October); 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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