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190371 (1999 RX81)
Classification: Main-belt Asteroid          SPK-ID: 2190371
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2457186249598463 6.4325e-08  
a 2.722737012343644 1.0892e-08 au
q 2.053709817543284 1.7619e-07 au
i 3.037015966340098 5.9169e-06 deg
node 226.9666835377153 0.00010477 deg
peri 152.2350733294322 0.00010502 deg
M 246.0942875315623 8.9594e-06 deg
tp 2459719.718279344185
(2022-May-20.21827934)
4.2531e-05 TDB
period 1640.993910781252
4.49
9.8465e-06
2.696e-08
d
yr
n .2193792418331459 1.3163e-09 deg/d
Q 3.391764207144004 1.3568e-08 au
  Orbit Determination Parameters
   # obs. used (total)      432  
   data-arc span      7560 days (20.70 yr)  
   first obs. used      1999-09-07  
   last obs. used      2020-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55116  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 07:02:36  

Additional Information
 Earth MOID = 1.05538 au 
 Jupiter MOID = 2.07879 au 
 T_jup = 3.311 
[ 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 16.02   n/a E2021B55  
diameter diameter 3.884 km 0.730 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.051   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

190371 (1999 RX81)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20080917/Numbers.arcLast Updated: 2008-09-19

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