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181887 (1999 RB55)
Classification: Main-belt Asteroid          SPK-ID: 2181887
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1914428872369795 3.695e-08  
a 2.265700464471548 9.2504e-09 au
q 1.831948225938949 8.6599e-08 au
i 5.977677432970437 4.007e-06 deg
node 191.3829611224346 3.8769e-05 deg
peri 179.9853552393113 4.0719e-05 deg
M 62.42429263318538 1.419e-05 deg
tp 2458984.500226155113
(2020-May-15.00022615)
4.8206e-05 TDB
period 1245.667596765389
3.41
7.6287e-06
2.089e-08
d
yr
n .2890016573721657 1.7699e-09 deg/d
Q 2.699452703004147 1.1021e-08 au
  Orbit Determination Parameters
   # obs. used (total)      431  
   data-arc span      7828 days (21.43 yr)  
   first obs. used      1999-08-31  
   last obs. used      2021-02-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50089  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:28  

Additional Information
 Earth MOID = .830435 au 
 Jupiter MOID = 2.76595 au 
 T_jup = 3.585 
[ 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 16.89   n/a MPCxxxxx  

181887 (1999 RB55)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1999 RB55 = 1999 QU2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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