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91490 (1999 RX123)
Classification: Main-belt Asteroid          SPK-ID: 2091490
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0440569371092833 4.3343e-08  
a 2.794767956914164 1.8212e-08 au
q 2.671639040801356 1.2488e-07 au
i 9.069238543500663 5.8257e-06 deg
node 169.0229749344173 2.6789e-05 deg
peri 73.80972356935527 7.361e-05 deg
M 258.9685127978072 7.1339e-05 deg
tp 2459479.429187230980
(2021-Sep-21.92918723)
0.00033987 TDB
period 1706.542308519147
4.67
1.6681e-05
4.567e-08
d
yr
n .2109528713134514 2.062e-09 deg/d
Q 2.917896873026971 1.9014e-08 au
  Orbit Determination Parameters
   # obs. used (total)      940  
   data-arc span      9864 days (27.01 yr)  
   first obs. used      1993-04-17  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55968  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:41:36  

Additional Information
 Earth MOID = 1.6776 au 
 Jupiter MOID = 2.08566 au 
 T_jup = 3.308 
[ 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 14.8   n/a MPO359383  
diameter diameter 3.724 km 0.800 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.168   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91490 (1999 RX123)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RX123 = 1999 ST27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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