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187770 (1998 RU41)
Classification: Main-belt Asteroid          SPK-ID: 2187770
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .210162840591423 4.5198e-08  
a 2.363796926522413 9.1835e-09 au
q 1.867014649863187 1.0487e-07 au
i 9.88653368625851 4.5218e-06 deg
node 182.6534836162657 2.2976e-05 deg
peri 200.5585944749412 2.4797e-05 deg
M 24.9725296532601 8.1021e-06 deg
tp 2459108.418219331594
(2020-Sep-15.91821933)
2.9874e-05 TDB
period 1327.43624698423
3.63
7.7357e-06
2.118e-08
d
yr
n .2711994649971893 1.5804e-09 deg/d
Q 2.860579203181639 1.1114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      666  
   data-arc span      8649 days (23.68 yr)  
   first obs. used      1997-05-09  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47646  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 11:57:19  

Additional Information
 Earth MOID = .87147 au 
 Jupiter MOID = 2.60329 au 
 T_jup = 3.500 
[ 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 16.38   n/a E2021B55  
diameter diameter 3.670 km 0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.036   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

187770 (1998 RU41)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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