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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02115374891475568 4.4413e-08  
a 5.211199187900901 7.239e-08 au
q 5.100962788735266 2.1689e-07 au
i 5.650388056877762 3.6712e-06 deg
node 240.3054615821423 4.7646e-05 deg
peri 296.4093423310708 0.00010769 deg
M 170.0960530536564 9.8844e-05 deg
tp 2456947.463489994276
(2014-Oct-16.96348999)
0.0011725 TDB
period 4345.151638344691
11.90
9.054e-05
2.479e-07
d
yr
n .08285096354822359 1.7264e-09 deg/d
Q 5.321435587066535 7.3922e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2134  
   data-arc span      25205 days (69.01 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:01:54  

Additional Information
 Earth MOID = 4.1081 au 
 Jupiter MOID = .153288 au 
 T_jup = 2.990 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457152.5 (2015-May-10.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02293434287538563 4.4521e-08  
q 5.097463710492415 2.189e-07 au
tp 2456975.084640575513
(2014-Nov-13.58464058)
0.0010823 TDB
node 240.3279763366081 4.765e-05 deg
peri 298.5417991736213 0.00010095 deg
i 5.647910776368118 3.6709e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2134  
   data-arc span      25205 days (69.01 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:01:54  

Additional Information
 Jupiter MOID = .153288 au 
 T_jup = 2.990 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.982114724303692E-15 -9.269065693694321E-15 5.238746646541272E-12 -5.850881025481767E-17 4.152151961037914E-13 9.282132829197832E-16
q -9.269065693694321E-15 4.791686513958018E-14 9.684401359963253E-12 1.350746305474605E-14 8.883873502574724E-13 -2.775068481553325E-15
tp 5.238746646541272E-12 9.684401359963253E-12 1.171344020098264E-6 8.865631750660106E-11 9.640097497431339E-8 7.421729111585863E-12
node -5.850881025481767E-17 1.350746305474605E-14 8.865631750660106E-11 2.270517550633502E-9 -2.251744131716672E-9 -3.378003866886568E-11
peri 4.152151961037914E-13 8.883873502574724E-13 9.640097497431339E-8 -2.251744131716672E-9 1.019027964833635E-8 3.424501748210962E-11
i 9.282132829197832E-16 -2.775068481553325E-15 7.421729111585863E-12 -3.378003866886568E-11 3.424501748210962E-11 1.347559829349202E-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. 2020-October); 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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