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9790 (1995 OK8)
Classification: Jupiter Trojan          SPK-ID: 2009790
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05603623571808563 5.065e-08  
a 5.243136624987416 7.8857e-08 au
q 4.949330985167494 3.1097e-07 au
i 5.91745645306256 4.0385e-06 deg
node 231.1678931677977 4.7831e-05 deg
peri 151.8900667413238 6.1575e-05 deg
M 340.5130282306975 3.7757e-05 deg
tp 2459437.870663684788
(2021-Aug-11.37066368)
0.0004593 TDB
period 4385.15742405586
12.01
9.893e-05
2.709e-07
d
yr
n .08209511431109211 1.8521e-09 deg/d
Q 5.536942264807339 8.3276e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1810  
   data-arc span      12130 days (33.21 yr)  
   first obs. used      1987-11-26  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52446  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:37:21  

Additional Information
 Earth MOID = 3.95306 au 
 Jupiter MOID = .0257794 au 
 T_jup = 2.986 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.02   n/a E2021B10  
diameter diameter 32.771 km 0.277 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 8.01 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:
[Stephens, R.D. (2016) http://www.planetarysciences.org/PHP/CS3_Lightcurves.php]
geometric albedo albedo 0.079   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

9790 (1995 OK8)          Discovered 1995-Jul-25 by Spacewatch at Kitt Peak
Reference: 19981208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 OK8 = 1987 WY1 = 1996 TG57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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