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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 ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02115375003061942 4.4547e-08  
a 5.211199190262152 7.2829e-08 au
q 5.100962785231581 2.1713e-07 au
i 5.650387447037904 3.757e-06 deg
node 240.3054566617456 4.8076e-05 deg
peri 296.4093419104453 0.00010911 deg
M 170.0960580688913 0.00010003 deg
tp 2456947.463428065685
(2014-Oct-16.96342807)
0.0011878 TDB
period 4345.151641297944
11.90
9.1088e-05
2.494e-07
d
yr
n .08285096349191257 1.7368e-09 deg/d
Q 5.321435595292724 7.437e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2089  
   data-arc span      25188 days (68.96 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46352  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:16:51  

Additional Information
 Earth MOID = 4.1081 au 
 Jupiter MOID = .153288 au 
 T_jup = 2.990 
[ 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 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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