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39886 (1998 EL12)
Classification: Main-belt Asteroid          SPK-ID: 2039886
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0816718116684461 3.991e-08  
a 2.993742900682329 1.9634e-08 au
q 2.749238494314054 1.2587e-07 au
i 11.03585408390946 4.6785e-06 deg
node 139.6641742684386 2.3048e-05 deg
peri 121.6866292607991 3.8078e-05 deg
M 23.58735158905255 3.0263e-05 deg
tp 2458876.535635588361
(2020-Jan-28.03563559)
0.000159 TDB
period 1891.995844455158
5.18
1.8612e-05
5.096e-08
d
yr
n .1902752593537911 1.8718e-09 deg/d
Q 3.238247307050603 2.1237e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1529  
   data-arc span      7745 days (21.20 yr)  
   first obs. used      1998-02-26  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50543  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:12:06  

Additional Information
 Earth MOID = 1.75258 au 
 Jupiter MOID = 1.93259 au 
 T_jup = 3.222 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456469.5 (2013-Jun-26.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0789942199546548 4.0097e-08  
q 2.754022727841236 1.2555e-07 au
tp 2456989.890834097716
(2014-Nov-28.39083410)
0.00016431 TDB
node 139.7396413620669 2.3081e-05 deg
peri 122.2283502206108 3.8882e-05 deg
i 11.0296062614264 4.6765e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1529  
   data-arc span      7745 days (21.20 yr)  
   first obs. used      1998-02-26  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50543  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:12:06  

Additional Information
 Jupiter MOID = 1.93259 au 
 T_jup = 3.222 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.607753836442276E-15 -4.986813297377217E-15 -3.489967268686664E-13 5.203186416301833E-15 -2.188969648404431E-14 -2.3615902878024E-15
q -4.986813297377217E-15 1.576264012331645E-14 7.921118219543338E-13 -1.444063463940107E-14 -4.404319435413276E-15 9.549822253356939E-15
tp -3.489967268686664E-13 7.921118219543338E-13 2.699639853541192E-8 -2.601021171279236E-11 5.162355239731587E-9 8.209176733259192E-12
node 5.203186416301833E-15 -1.444063463940107E-14 -2.601021171279236E-11 5.32719449311938E-10 -5.27166533654697E-10 1.504312392000958E-11
peri -2.188969648404431E-14 -4.404319435413276E-15 5.162355239731587E-9 -5.27166533654697E-10 1.51181071568512E-9 -1.321097074711872E-11
i -2.3615902878024E-15 9.549822253356939E-15 8.209176733259192E-12 1.504312392000958E-11 -1.321097074711872E-11 2.186998681867262E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2   n/a MPO347806  
diameter diameter 8.198 km 0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.530461 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.166   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39886 (1998 EL12)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 EL12 = 2000 QU102 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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