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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1274111946391274 5.2334e-08  
a 2.799152811662057 1.8604e-08 au
q 2.442509407950722 1.4584e-07 au
i 8.637830005056147 6.7422e-06 deg
node 350.6298796962472 3.1978e-05 deg
peri 70.79401063270508 4.14e-05 deg
M 176.6148081929724 2.4873e-05 deg
tp 2458557.304874925851
(2019-Mar-14.80487493)
0.00011705 TDB
period 1710.560106016721
4.68
1.7053e-05
4.669e-08
d
yr
n .2104573810260959 2.0982e-09 deg/d
Q 3.155796215373392 2.0974e-08 au
  Orbit Determination Parameters
   # obs. used (total)      500  
   data-arc span      10693 days (29.28 yr)  
   first obs. used      1992-02-29  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57124  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:40:52  

Additional Information
 Earth MOID = 1.47077 au 
 Jupiter MOID = 2.20748 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 15.56   n/a E2021B10  
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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