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58918 (1998 KB54)
Classification: Main-belt Asteroid          SPK-ID: 2058918
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06866929269914411 3.8448e-08  
a 2.615369693123906 1.3864e-08 au
q 2.435774106150309 9.9574e-08 au
i 9.733946566808237 4.2026e-06 deg
node 154.6445372592507 2.0665e-05 deg
peri 346.5736003346176 3.9302e-05 deg
M 172.7267055491799 3.6325e-05 deg
tp 2458259.266487945329
(2018-May-20.76648795)
0.0001526 TDB
period 1544.89176118573
4.23
1.2284e-05
3.363e-08
d
yr
n .2330260339557342 1.8529e-09 deg/d
Q 2.794965280097502 1.4816e-08 au
  Orbit Determination Parameters
   # obs. used (total)      916  
   data-arc span      8211 days (22.48 yr)  
   first obs. used      1998-05-23  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57268  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:40:55  

Additional Information
 Earth MOID = 1.44894 au 
 Jupiter MOID = 2.20339 au 
 T_jup = 3.384 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457567.5 (2016-Jun-28.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06791698116481192 3.8099e-08  
q 2.437575583207209 9.8626e-08 au
tp 2458253.683960780387
(2018-May-15.18396078)
0.00015555 TDB
node 154.763833715416 2.0693e-05 deg
peri 345.2514479428374 3.9905e-05 deg
i 9.726417167785145 4.2002e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      916  
   data-arc span      8211 days (22.48 yr)  
   first obs. used      1998-05-23  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57268  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:40:55  

Additional Information
 Jupiter MOID = 2.20339 au 
 T_jup = 3.384 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.451571249079224E-15 -3.725873551938883E-15 1.660614516146115E-12 -8.106550853198295E-15 3.490015912514995E-13 -3.840762623201558E-16
q -3.725873551938883E-15 9.727151971169538E-15 -3.213426643051796E-12 2.042494336435526E-14 -6.780851210428458E-13 4.651259003231892E-16
tp 1.660614516146115E-12 -3.213426643051796E-12 2.419452196048029E-8 -1.905974704211344E-11 5.31557582528478E-9 -1.625518338578946E-11
node -8.106550853198295E-15 2.042494336435526E-14 -1.905974704211344E-11 4.282192451489301E-10 -4.258094056701862E-10 6.233437474101203E-12
peri 3.490015912514995E-13 -6.780851210428458E-13 5.31557582528478E-9 -4.258094056701862E-10 1.592410879898612E-9 -9.76873437607309E-12
i -3.840762623201558E-16 4.651259003231892E-16 -1.625518338578946E-11 6.233437474101203E-12 -9.76873437607309E-12 1.764204669199516E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO436194  
diameter diameter 2.289 km 0.454 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.405   0.132 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

58918 (1998 KB54)          Discovered 1998-May-23 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 KB54 = 1999 RH217 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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