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4833 Meges (1989 AL2)
Classification: Jupiter Trojan          SPK-ID: 2004833
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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09308494893025721 3.8084e-08  
a 5.231475895826585 8.7559e-08 au
q 4.744504229233696 2.4625e-07 au
i 34.72907076966737 6.2739e-07 deg
node 101.7430167599356 5.5558e-06 deg
peri 280.8517880479246 2.0064e-05 deg
M 336.3337842092435 2.3474e-05 deg
tp 2459487.816845232996
(2021-Sep-30.31684523)
0.00028672 TDB
period 4370.536683954242
11.97
0.00010972
3.004e-07
d
yr
n .08236974679143755 2.0679e-09 deg/d
Q 5.718447562419474 9.571e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2161  
   data-arc span      16471 days (45.10 yr)  
   first obs. used      1975-12-04  
   last obs. used      2021-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46076  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 16:59:29  

Additional Information
 Earth MOID = 3.93058 au 
 Jupiter MOID = .0765217 au 
 T_jup = 2.636 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456944.5 (2014-Oct-14.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09175706307079876 3.8299e-08  
q 4.764467037937943 2.4741e-07 au
tp 2455096.475150346981
(2009-Sep-21.97515035)
0.00027653 TDB
node 101.7670820580473 5.5557e-06 deg
peri 279.9044693220937 1.9869e-05 deg
i 34.69155709331138 6.2834e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2161  
   data-arc span      16471 days (45.10 yr)  
   first obs. used      1975-12-04  
   last obs. used      2021-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46076  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 16:59:29  

Additional Information
 Jupiter MOID = .0765217 au 
 T_jup = 2.636 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.466778646849421E-15 -9.054867955225671E-15 -1.699212750780213E-12 5.046195792126087E-14 -2.384268650879906E-13 -4.247050342827065E-15
q -9.054867955225671E-15 6.120927362857926E-14 6.392387637308186E-12 -2.747568757574801E-13 1.398880047085153E-12 2.362593037831025E-14
tp -1.699212750780213E-12 6.392387637308186E-12 7.646668016277753E-8 -5.103224806026633E-11 5.225910983214683E-9 9.479686110882334E-12
node 5.046195792126087E-14 -2.747568757574801E-13 -5.103224806026633E-11 3.086578034809288E-11 -2.962660681086254E-11 -1.738613816161618E-12
peri -2.384268650879906E-13 1.398880047085153E-12 5.225910983214683E-9 -2.962660681086254E-11 3.94760524433746E-10 2.180784662443335E-12
i -4.247050342827065E-15 2.362593037831025E-14 9.479686110882334E-12 -1.738613816161618E-12 2.180784662443335E-12 3.948096355673139E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.04   n/a E2021B10  
diameter diameter 80.165 km 0.939 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 14.250 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Stephens, R.D.; Coley, D.R.; Warner, B.D.; French, L.M. (2016) Minor Planet Bull. 43, 323-331.]
[Stephens, R.D. Warner, B.D. (2017) Minor Planet Bull. 44, 312-316.]
geometric albedo albedo 0.076   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

4833 Meges (1989 AL2)          Discovered 1989-Jan-08 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1989 AL2 = 1975 XN5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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