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15218 (1981 EO41)
Classification: Main-belt Asteroid          SPK-ID: 2015218
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1379203736324873 4.7549e-08  
a 2.76466150892238 1.2998e-08 au
q 2.38335836064445 1.2927e-07 au
i 9.727980833082492 5.4369e-06 deg
node 5.959396145024454 2.1831e-05 deg
peri 357.4463741844903 2.6412e-05 deg
M 4.334066558602895 1.3839e-05 deg
tp 2458980.285898048607
(2020-May-10.78589805)
6.4529e-05 TDB
period 1679.041289307561
4.60
1.1841e-05
3.242e-08
d
yr
n .2144080686356823 1.5121e-09 deg/d
Q 3.145964657200311 1.4791e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1692  
   data-arc span      14504 days (39.71 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:35:03  

Additional Information
 Earth MOID = 1.38119 au 
 Jupiter MOID = 2.30922 au 
 T_jup = 3.305 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456859.5 (2014-Jul-21.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1409680994256462 4.7836e-08  
q 2.37456777774014 1.3064e-07 au
tp 2457299.744262882034
(2015-Oct-04.24426288)
6.2011e-05 TDB
node 6.111990272748589 2.1771e-05 deg
peri 357.1688613086041 2.6113e-05 deg
i 9.745658260855025 5.4447e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1692  
   data-arc span      14504 days (39.71 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:35:03  

Additional Information
 Jupiter MOID = 2.30922 au 
 T_jup = 3.305 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.288275299537214E-15 -6.227888214838271E-15 3.646223490281506E-13 7.223984442094825E-15 3.532812952896442E-14 -1.146868635688544E-15
q -6.227888214838271E-15 1.706744923684098E-14 -1.051125524238291E-12 -1.994465807210958E-14 -1.168837170551246E-13 3.593575147745277E-15
tp 3.646223490281506E-13 -1.051125524238291E-12 3.845390142584706E-9 -6.118781321418712E-12 9.018339262984605E-10 -8.888317466188113E-14
node 7.223984442094825E-15 -1.994465807210958E-14 -6.118781321418712E-12 4.739840604220569E-10 -4.680434357406583E-10 1.793246839888561E-11
peri 3.532812952896442E-14 -1.168837170551246E-13 9.018339262984605E-10 -4.680434357406583E-10 6.818720506236682E-10 -1.770062628595792E-11
i -1.146868635688544E-15 3.593575147745277E-15 -8.888317466188113E-14 1.793246839888561E-11 -1.770062628595792E-11 2.964490955365611E-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 14.0   n/a MPO358779  
diameter diameter 6.292 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.148   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15218 (1981 EO41)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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