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91559 (1999 RM226)
Classification: Main-belt Asteroid          SPK-ID: 2091559
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1271806279332532 5.364e-08  
a 2.800159339116235 1.9224e-08 au
q 2.444033316054269 1.4869e-07 au
i 8.636783246953241 7.1439e-06 deg
node 350.6265585499261 3.2124e-05 deg
peri 70.94855854871152 4.354e-05 deg
M 93.13108143773013 2.6799e-05 deg
tp 2458557.743761117874
(2019-Mar-15.24376112)
0.00012735 TDB
period 1711.482821168992
4.69
1.7625e-05
4.825e-08
d
yr
n .2103439167178492 2.1661e-09 deg/d
Q 3.156285362178202 2.1669e-08 au
  Orbit Determination Parameters
   # obs. used (total)      494  
   data-arc span      10279 days (28.14 yr)  
   first obs. used      1992-02-29  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57243  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:42:22  

Additional Information
 Earth MOID = 1.47274 au 
 Jupiter MOID = 2.20562 au 
 T_jup = 3.297 
[ 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 15.5   n/a MPO459428  
diameter diameter 2.178 km 0.331 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.214   0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91559 (1999 RM226)          Discovered 1999-Sep-04 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 RM226 = 1999 SX21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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