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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0572429489054599 4.0656e-08  
a 5.170434321447344 7.1114e-08 au
q 4.874463413765698 2.5305e-07 au
i 1.776615104777737 3.7259e-06 deg
node 111.8821558369947 0.00017035 deg
peri 325.6077641971179 0.00017645 deg
M 319.6977060968053 4.5669e-05 deg
tp 2459681.246610071709
(2022-Apr-11.74661007)
0.00054532 TDB
period 4294.266228158698
11.76
8.8595e-05
2.426e-07
d
yr
n .0838327157360156 1.7296e-09 deg/d
Q 5.466405229128991 7.5185e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1835  
   data-arc span      17288 days (47.33 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4886  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:07:08  

Additional Information
 Earth MOID = 3.88962 au 
 Jupiter MOID = .0456809 au 
 T_jup = 2.996 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.28   n/a E2021B10  
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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