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1647 Menelaus (1957 MK)
Classification: Jupiter Trojan          SPK-ID: 2001647
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02115375669831024 4.5537e-08  
a 5.211199204131779 7.5952e-08 au
q 5.100962764061148 2.1894e-07 au
i 5.650384172516383 4.1919e-06 deg
node 240.305436152302 4.9492e-05 deg
peri 296.4093341316457 0.00011754 deg
M 170.0960845738711 0.00010755 deg
tp 2456947.463099957890
(2014-Oct-16.96309996)
0.0012847 TDB
period 4345.151658644902
11.90
9.4995e-05
2.601e-07
d
yr
n .08285096316115034 1.8113e-09 deg/d
Q 5.32143564420241 7.7559e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1869  
   data-arc span      25106 days (68.74 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48378  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:38:09  

Additional Information
 Earth MOID = 4.1081 au 
 Jupiter MOID = .153288 au 
 T_jup = 2.990 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456672.5 (2014-Jan-15.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02366960932226612 4.5654e-08  
q 5.097935159348874 2.2095e-07 au
tp 2456949.077783006355
(2014-Oct-18.57778301)
0.0011502 TDB
node 240.3570323491844 4.9495e-05 deg
peri 296.2601095815057 0.00010728 deg
i 5.646649186785518 4.1904e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1869  
   data-arc span      25106 days (68.74 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48378  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:38:09  

Additional Information
 Jupiter MOID = .153288 au 
 T_jup = 2.990 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.084288706961922E-15 -9.556802022698676E-15 1.559649470977237E-12 -2.852222649741195E-15 9.82891260827142E-14 3.497114901930888E-16
q -9.556802022698676E-15 4.882000244314306E-14 1.983342770067323E-11 2.813360697220683E-14 1.751579081626139E-12 -3.766094453617128E-16
tp 1.559649470977237E-12 1.983342770067323E-11 1.323020175713616E-6 6.743251356452146E-11 1.095599528523169E-7 2.545730191639189E-12
node -2.852222649741195E-15 2.813360697220683E-14 6.743251356452146E-11 2.449787578196154E-9 -2.431959259203614E-9 -6.768145874360134E-12
peri 9.82891260827142E-14 1.751579081626139E-12 1.095599528523169E-7 -2.431959259203614E-9 1.150948250767309E-8 6.961901947983546E-12
i 3.497114901930888E-16 -3.766094453617128E-16 2.545730191639189E-12 -6.768145874360134E-12 6.961901947983546E-12 1.755973186851153E-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 10.5   n/a MPO416723  
diameter diameter 42.716 km 0.517 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 17.74 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Stephens, R.D.; Coley, D.R.; Warner, B.D.; French, L.M. (2016) Minor Planet Bull. 43, 323-331.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.056   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

1647 Menelaus (1957 MK)          Discovered 1957-Jun-23 by Nicholson, S. B. at Mount Wilson
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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