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91468 (1999 RH87)
Classification: Main-belt Asteroid          SPK-ID: 2091468
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1918770213747987 4.6589e-08  
a 2.790450016529179 1.3877e-08 au
q 2.255026779062302 1.2765e-07 au
i 2.898769753219903 5.1537e-06 deg
node 330.5063941813396 8.2286e-05 deg
peri 76.60655505712312 8.3959e-05 deg
M 122.3605456571883 1.3644e-05 deg
tp 2458421.806368943571
(2018-Oct-30.30636894)
6.409e-05 TDB
period 1702.588902831325
4.66
1.2701e-05
3.477e-08
d
yr
n .2114427031688841 1.5773e-09 deg/d
Q 3.325873253996055 1.654e-08 au
  Orbit Determination Parameters
   # obs. used (total)      818  
   data-arc span      7533 days (20.62 yr)  
   first obs. used      1999-09-04  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47274  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:41:12  

Additional Information
 Earth MOID = 1.26693 au 
 Jupiter MOID = 2.08272 au 
 T_jup = 3.300 
[ 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 15.3   n/a MPO453354  
diameter diameter 4.942 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.060   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91468 (1999 RH87)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RH87 = 2001 DJ37 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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