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18998 (2000 RH55)
Classification: Main-belt Asteroid          SPK-ID: 2018998
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1346861060506241 3.5769e-08  
a 2.350810037906765 8.9783e-09 au
q 2.034188587836383 8.3021e-08 au
i 7.383045421592983 3.6707e-06 deg
node 285.2826871137587 2.9275e-05 deg
peri 31.52302409816218 3.2441e-05 deg
M 122.6831454570471 1.4639e-05 deg
tp 2458151.850556817053
(2018-Feb-02.35055682)
5.3026e-05 TDB
period 1316.511725748089
3.60
7.5421e-06
2.065e-08
d
yr
n .2734499001863694 1.5666e-09 deg/d
Q 2.667431487977148 1.0188e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2088  
   data-arc span      14091 days (38.58 yr)  
   first obs. used      1981-05-09  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48299  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:33:52  

Additional Information
 Earth MOID = 1.02344 au 
 Jupiter MOID = 2.58963 au 
 T_jup = 3.534 
[ 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 13.6   n/a MPO319322  
diameter diameter 7.103 km 0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.096   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18998 (2000 RH55)          Discovered 2000-Sep-03 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 RH55 = 1981 JM1 = 1998 BP44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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