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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05759675482454128 4.0638e-08  
a 5.172377784262983 7.0907e-08 au
q 4.874465609162884 2.5287e-07 au
i 1.77662640413455 3.7059e-06 deg
node 111.8808386853909 0.00016993 deg
peri 325.5033640034434 0.00017593 deg
M 336.2424747651654 4.5213e-05 deg
tp 2459680.051847896187
(2022-Apr-10.55184790)
0.00053994 TDB
period 4296.687648802494
11.76
8.8354e-05
2.419e-07
d
yr
n .08378547137359021 1.7229e-09 deg/d
Q 5.470289959363082 7.4991e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1951  
   data-arc span      17468 days (47.82 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-07-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47523  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:43:46  

Additional Information
 Earth MOID = 3.88991 au 
 Jupiter MOID = .0457551 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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