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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1349813210552997 3.4431e-08  
a 2.350239803577737 8.4897e-09 au
q 2.033001330094066 8.05e-08 au
i 7.383479201962693 3.4334e-06 deg
node 285.2840035235543 2.7978e-05 deg
peri 31.566595539085 3.0831e-05 deg
M 232.0234761532009 1.4422e-05 deg
tp 2459468.336930352288
(2021-Sep-10.83693035)
5.3684e-05 TDB
period 1316.032736820084
3.60
7.1308e-06
1.952e-08
d
yr
n .2735494261866647 1.4822e-09 deg/d
Q 2.667478277061408 9.6356e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2288  
   data-arc span      14233 days (38.97 yr)  
   first obs. used      1981-05-09  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46487  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:56:11  

Additional Information
 Earth MOID = 1.0231 au 
 Jupiter MOID = 2.59181 au 
 T_jup = 3.535 
[ 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

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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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