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109722 (2001 RL55)
Classification: Main-belt Asteroid          SPK-ID: 2109722
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1652690562176972 4.7986e-08  
a 2.990354293621971 2.5482e-08 au
q 2.496141261758529 1.3818e-07 au
i 2.966389623823666 5.3851e-06 deg
node 9.618561527806776 8.7534e-05 deg
peri 313.4436527316279 8.9038e-05 deg
M 236.3133761889709 2.1064e-05 deg
tp 2459649.437139723885
(2022-Mar-10.93713972)
0.00011632 TDB
period 1888.784438465422
5.17
2.4143e-05
6.61e-08
d
yr
n .1905987748885143 2.4362e-09 deg/d
Q 3.484567325485413 2.9693e-08 au
  Orbit Determination Parameters
   # obs. used (total)      453  
   data-arc span      10341 days (28.31 yr)  
   first obs. used      1991-10-12  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62479  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:31:35  

Additional Information
 Earth MOID = 1.48507 au 
 Jupiter MOID = 1.84701 au 
 T_jup = 3.233 
[ 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 15.4   n/a MPO432619  
diameter diameter 4.042 km 0.700 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.090   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109722 (2001 RL55)          Discovered 2001-Sep-12 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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