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JPL Small-Body Database Browser
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10694 Lacerda (1981 EH21)
Classification: Outer Main-belt Asteroid          SPK-ID: 2010694
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 .03566026735784803 3.7765e-08  
a 3.208955547457296 2.2138e-08 au
q 3.09452333469552 1.1879e-07 au
i 22.08220178691943 5.9743e-06 deg
node 177.8800113042186 1.1742e-05 deg
peri 128.4220446204066 8.7726e-05 deg
M 170.5984153060265 8.7321e-05 deg
tp 2458005.515144919137
(2017-Sep-09.01514492)
0.00050808 TDB
period 2099.635844720871
5.75
2.1728e-05
5.949e-08
d
yr
n .1714583035458984 1.7743e-09 deg/d
Q 3.323387760219073 2.2928e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1353  
   data-arc span      14238 days (38.98 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48581  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:47:43  

Additional Information
 Earth MOID = 2.11418 au 
 Jupiter MOID = 1.81212 au 
 T_jup = 3.076 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456776.5 (2014-Apr-29.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03518452050827471 3.6839e-08  
q 3.098054638385775 1.1539e-07 au
tp 2455869.415993529931
(2011-Nov-03.91599353)
0.00051576 TDB
node 178.0304878215743 1.1763e-05 deg
peri 122.3357824186393 8.9386e-05 deg
i 22.030674483337 5.9709e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1353  
   data-arc span      14238 days (38.98 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48581  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:47:43  

Additional Information
 Jupiter MOID = 1.81212 au 
 T_jup = 3.076 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.357145560730446E-15 -4.178328865977592E-15 2.312869409853801E-12 2.543766775404714E-15 4.046619491353532E-13 1.792998216763405E-15
q -4.178328865977592E-15 1.331462398199157E-14 -5.569517083445826E-12 -7.494238589870687E-15 -9.462380254474735E-13 -7.078794372573385E-15
tp 2.312869409853801E-12 -5.569517083445826E-12 2.66012522164624E-7 3.971561938441779E-11 4.571538589888573E-8 1.911856312674745E-11
node 2.543766775404714E-15 -7.494238589870687E-15 3.971561938441779E-11 1.383668370235697E-10 -1.216328769744912E-10 2.048671734286944E-11
peri 4.046619491353532E-13 -9.462380254474735E-13 4.571538589888573E-8 -1.216328769744912E-10 7.989857029341132E-9 -1.631858455217196E-11
i 1.792998216763405E-15 -7.078794372573385E-15 1.911856312674745E-11 2.048671734286944E-11 -1.631858455217196E-11 3.565150731885397E-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 MPO458933  
diameter diameter 11.708 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.188 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.089   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

10694 Lacerda           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring.
Pedro Lacerda (b. 1975) is a Lecturer at Queen's University Belfast whose work includes analyzing rotational lightcurves to infer physical properties of trans-Neptunian objects and other small solar system bodies.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-03-12Last Updated: 2017-04-19

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