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12658 Peiraios (1973 SL)
Classification: Jupiter Trojan          SPK-ID: 2012658
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 .05691016829649298 4.0719e-08  
a 5.168437589298605 8.4692e-08 au
q 4.874300936261701 2.5478e-07 au
i 1.776629639095642 5.013e-06 deg
node 111.8828625980683 0.00017839 deg
peri 325.8087239025276 0.00018725 deg
M 302.708946067498 5.9083e-05 deg
tp 2459683.501491906101
(2022-Apr-14.00149191)
0.00071072 TDB
period 4291.778911518766
11.75
0.00010549
2.888e-07
d
yr
n .08388130130230868 2.0618e-09 deg/d
Q 5.46257424233551 8.9511e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1395  
   data-arc span      16908 days (46.29 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53258  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 22:52:11  

Additional Information
 Earth MOID = 3.88992 au 
 Jupiter MOID = .0456206 au 
 T_jup = 2.996 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456516.5 (2013-Aug-12.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05852321624355403 4.0665e-08  
q 4.84851451825203 2.5326e-07 au
tp 2455413.600909410415
(2010-Aug-05.10090941)
0.00065577 TDB
node 111.8767850415837 0.00017859 deg
peri 326.4846085436383 0.00018701 deg
i 1.777477532497429 5.0139e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1395  
   data-arc span      16908 days (46.29 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53258  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 22:52:11  

Additional Information
 Jupiter MOID = .0456206 au 
 T_jup = 2.996 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.653669213287954E-15 -9.868201867354012E-15 -1.712683000392862E-12 2.998874368420299E-15 -1.793177538003491E-13 1.091092060029768E-17
q -9.868201867354012E-15 6.413972945928695E-14 2.189596222818627E-11 -2.07453965319481E-14 2.199469820219064E-12 3.193265649939504E-16
tp -1.712683000392862E-12 2.189596222818627E-11 4.30037319798129E-7 -7.179676294061347E-11 3.644987830024351E-8 6.890307510542823E-13
node 2.998874368420299E-15 -2.07453965319481E-14 -7.179676294061347E-11 3.189595956821879E-8 -3.188663764949631E-8 3.124438489106921E-10
peri -1.793177538003491E-13 2.199469820219064E-12 3.644987830024351E-8 -3.188663764949631E-8 3.497162010307273E-8 -3.122245776046899E-10
i 1.091092060029768E-17 3.193265649939504E-16 6.890307510542823E-13 3.124438489106921E-10 -3.122245776046899E-10 2.51394315644993E-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 11.2   n/a MPO259433  
diameter diameter 26.458 km 0.453 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.084   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

12658 Peiraios           Discovered 1973 Sept. 19 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Peiraios, son of Klytios, was a friend of Telemachos.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1973 SL = 1996 TZ39 = 1998 XU79 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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