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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02118292916600937 4.4239e-08  
a 5.211011503400259 7.2056e-08 au
q 5.100627015840471 2.1654e-07 au
i 5.650412271602018 3.6331e-06 deg
node 240.3054164790244 4.7387e-05 deg
peri 295.5372066158494 0.00010717 deg
M 187.5765986426045 9.8666e-05 deg
tp 2461281.514862799828
(2026-Aug-29.01486280)
0.0012137 TDB
period 4344.916900549272
11.90
9.012e-05
2.467e-07
d
yr
n .08285543964131738 1.7185e-09 deg/d
Q 5.321395990960046 7.3582e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2251  
   data-arc span      25269 days (69.18 yr)  
   first obs. used      1951-11-08  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45233  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:57:06  

Additional Information
 Earth MOID = 4.10756 au 
 Jupiter MOID = .152747 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 10.57   n/a E2021B10  
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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