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136574 (1981 EW16)
Classification: Main-belt Asteroid          SPK-ID: 2136574
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .229171027413267 5.4932e-08  
a 2.753924433222558 2.0028e-08 au
q 2.122804741442446 1.4602e-07 au
i 2.639926769943071 5.4433e-06 deg
node 229.1539551313667 0.00014095 deg
peri 349.532941118995 0.00014152 deg
M 175.2090626335635 1.3259e-05 deg
tp 2458188.080159382818
(2018-Mar-10.58015938)
5.8564e-05 TDB
period 1669.269489979903
4.57
1.821e-05
4.986e-08
d
yr
n .2156632000770194 2.3527e-09 deg/d
Q 3.385044125002671 2.4618e-08 au
  Orbit Determination Parameters
   # obs. used (total)      252  
   data-arc span      14131 days (38.69 yr)  
   first obs. used      1981-02-12  
   last obs. used      2019-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65158  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 16:04:00  

Additional Information
 Earth MOID = 1.1153 au 
 Jupiter MOID = 1.59398 au 
 T_jup = 3.304 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456936.5 (2014-Oct-06.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2287396564799713 5.491e-08  
q 2.124907235573461 1.4592e-07 au
tp 2456519.108976922690
(2013-Aug-14.60897692)
5.7173e-05 TDB
node 229.1687050950576 0.00014107 deg
peri 349.6728697493196 0.00014165 deg
i 2.637750885748248 5.4429e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      252  
   data-arc span      14131 days (38.69 yr)  
   first obs. used      1981-02-12  
   last obs. used      2019-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65158  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 16:04:00  

Additional Information
 Jupiter MOID = 1.59398 au 
 T_jup = 3.304 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.015152979155952E-15 -7.973739051273492E-15 -1.150351934815152E-12 3.514289745442908E-14 -3.23631845883173E-13 -1.033674712786345E-15
q -7.973739051273492E-15 2.129272798961018E-14 3.107998439781004E-12 -7.681575799376988E-14 8.653117045864739E-13 2.927929019352946E-15
tp -1.150351934815152E-12 3.107998439781004E-12 3.268765492429184E-9 -1.073271772654695E-11 7.942542574351944E-10 4.10920676022126E-13
node 3.514289745442908E-14 -7.681575799376988E-14 -1.073271772654695E-11 1.990174643444613E-8 -1.988063106771535E-8 -2.468778843055404E-10
peri -3.23631845883173E-13 8.653117045864739E-13 7.942542574351944E-10 -1.988063106771535E-8 2.006399873232457E-8 2.467526743191649E-10
i -1.033674712786345E-15 2.927929019352946E-15 4.10920676022126E-13 -2.468778843055404E-10 2.467526743191649E-10 2.962526120080311E-11

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 16.3   n/a MPO449765  
diameter diameter 4.195 km 1.356 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.036   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

136574 (1981 EW16)          Discovered 1981-Mar-06 by Bus, S. J. at Siding Spring
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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