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12973 Melanthios (1973 SY1)
Classification: Jupiter Trojan          SPK-ID: 2012973
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05871268159585226 6.155e-08  
a 5.118209393881498 8.9596e-08 au
q 4.817705595397634 3.7164e-07 au
i 5.74550380593469 6.811e-06 deg
node 358.1351892379408 3.6253e-05 deg
peri 37.26073290890502 5.7943e-05 deg
M 332.5701179607642 4.4816e-05 deg
tp 2459522.752978721937
(2021-Nov-04.25297872)
0.00052691 TDB
period 4229.368255173479
11.58
0.00011106
3.041e-07
d
yr
n .08511909540145579 2.2351e-09 deg/d
Q 5.418713192365363 9.4857e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1414  
   data-arc span      17313 days (47.40 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51076  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:40:13  

Additional Information
 Earth MOID = 3.82511 au 
 Jupiter MOID = .0648402 au 
 T_jup = 2.987 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457446.5 (2016-Feb-28.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05671187879085134 6.1585e-08  
q 4.834650625684295 3.6998e-07 au
tp 2459519.313355267323
(2021-Oct-31.81335527)
0.00054467 TDB
node 358.218987495102 3.6244e-05 deg
peri 36.40125827149246 5.9265e-05 deg
i 5.744301903940118 6.8088e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1414  
   data-arc span      17313 days (47.40 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51076  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:40:13  

Additional Information
 Jupiter MOID = .0648402 au 
 T_jup = 2.987 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.792691436090552E-15 -2.237386392012998E-14 -1.514637043991732E-11 -2.387093192190029E-15 -1.073565715602829E-12 -2.059425056835929E-15
q -2.237386392012998E-14 1.368834828378677E-13 7.729282055565828E-11 1.880427793438479E-14 5.031736654372771E-12 1.584010724699664E-14
tp -1.514637043991732E-11 7.729282055565828E-11 2.966620782032243E-7 1.052579809345509E-11 2.539234174086733E-8 8.330685908570273E-12
node -2.387093192190029E-15 1.880427793438479E-14 1.052579809345509E-11 1.313608789094207E-9 -1.306253209432694E-9 -2.687762252010579E-11
peri -1.073565715602829E-12 5.031736654372771E-12 2.539234174086733E-8 -1.306253209432694E-9 3.512292975282764E-9 2.717199413087127E-11
i -2.059425056835929E-15 1.584010724699664E-14 8.330685908570273E-12 -2.687762252010579E-11 2.717199413087127E-11 4.635922220721138E-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 11.49   n/a E2021B10  

12973 Melanthios           Discovered 1973 Sept. 19 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Melanthios was a goat herder of Odysseus. He mocked Odysseus when the latter came to Eumaios disguised as a beggar. Later Odysseus killed him.
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 SY1 = 1996 SY7 = 1998 VO21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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