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20550 (1999 RX110)
Classification: Main-belt Asteroid          SPK-ID: 2020550
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07184363899880457 3.4686e-08  
a 2.520760227783152 9.5351e-09 au
q 2.339659639975755 8.7751e-08 au
i 5.80850139835254 3.8203e-06 deg
node 294.6398970566105 3.8289e-05 deg
peri 6.900737941397744 4.8579e-05 deg
M 178.1822630731258 3.1757e-05 deg
tp 2458476.968066638675
(2018-Dec-24.46806664)
0.00012819 TDB
period 1461.826174601789
4.00
8.2943e-06
2.271e-08
d
yr
n .2462673102005895 1.3973e-09 deg/d
Q 2.70186081559055 1.022e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1918  
   data-arc span      11730 days (32.11 yr)  
   first obs. used      1989-01-31  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46359  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:43  

Additional Information
 Earth MOID = 1.3222 au 
 Jupiter MOID = 2.45231 au 
 T_jup = 3.446 
[ 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 14.26   n/a E2021B10  
diameter diameter 4.366 km 1.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.228   0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20550 (1999 RX110)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RX110 = 1989 BG2 = 1998 KB64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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