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JPL Small-Body Database Browser
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185490 (2007 GR1)
Classification: Jupiter Trojan          SPK-ID: 2185490
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01668978348029774 8.0017e-08  
a 5.112243457475856 1.9636e-07 au
q 5.026921221072016 4.814e-07 au
i 30.24597662325309 1.0524e-05 deg
node 26.01132369958332 1.4771e-05 deg
peri 278.2010546125924 0.00044744 deg
M 281.7985426993434 0.00045666 deg
tp 2459917.624011758727
(2022-Dec-04.12401176)
0.0053746 TDB
period 4221.975595208883
11.56
0.00024325
6.66e-07
d
yr
n .08526813854834443 4.9127e-09 deg/d
Q 5.197565693879696 1.9964e-07 au
  Orbit Determination Parameters
   # obs. used (total)      256  
   data-arc span      6412 days (17.56 yr)  
   first obs. used      2001-10-16  
   last obs. used      2019-05-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51778  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 07:52:47  

Additional Information
 Earth MOID = 4.08861 au 
 Jupiter MOID = .135995 au 
 T_jup = 2.730 
[ 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 12.9   n/a MPO436916  
diameter diameter 16.187 km 1.123 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.035   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

185490 (2007 GR1)          Discovered 2007-Apr-09 by Bergen-Enkheim at Bergen-Enkheim
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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