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15977 (1998 MA11)
Classification: Jupiter Trojan          SPK-ID: 2015977
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 .0469689921608752 4.6476e-08  
a 5.179724194896393 7.814e-08 au
q 4.936437769790809 2.1266e-07 au
i 17.34631144085338 5.3383e-06 deg
node 209.572496481973 1.235e-05 deg
peri 228.6036795587855 5.2487e-05 deg
M 140.157591622365 5.0832e-05 deg
tp 2457324.119866130137
(2015-Oct-28.61986613)
0.00060224 TDB
period 4305.844879378268
11.79
9.7436e-05
2.668e-07
d
yr
n .08360728500093606 1.8919e-09 deg/d
Q 5.423010620001977 8.181e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2202  
   data-arc span      24298 days (66.52 yr)  
   first obs. used      1953-12-07  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42708  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 17:54:19  

Additional Information
 Earth MOID = 3.97397 au 
 Jupiter MOID = .0310709 au 
 T_jup = 2.907 
[ 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 10.4   n/a MPO435848  
diameter diameter 43.530 km 0.855 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 250. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 265-270.]
geometric albedo albedo 0.071   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

15977 (1998 MA11)          Discovered 1998-Jun-19 by LINEAR at Socorro
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 MA11 = 1999 NG2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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