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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 ]

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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 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 
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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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1903-Aug-02 20:57 00:03 Jupiter 1.99371523278697 1.9937132886433 1.99371717695649 6.84412748928889 6.78176883370481 2416329.372579327 2.89123474186407 386.779229100217 27.1851938671765 -76.0397531118798 4098382.60704466 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 19:48:01 2020-Feb-22 19:48
2059-Jan-25 11:42 00:01 Jupiter 1.95575615279081 1.95575537938787 1.95575692619598 6.41169486104569 6.34378804935838 2473118.987308807 1.24583843040619 171.56535571117 29.865532124978 81.5993971445381 3335386.74930871 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 19:48:01 2020-Feb-22 19:48
2070-Apr-13 21:44 00:01 Jupiter 1.87706304608345 1.87706251718049 1.87706357498673 6.84165957282639 6.77538250117329 2477215.405476549 1.47482167130899 228.85750797317 25.6248317800772 -88.959983248629 3859863.5205452 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 19:48:01 2020-Feb-22 19:48
2081-Jun-30 08:36 00:02 Jupiter 1.99138919335829 1.99138805888808 1.99139032783767 6.90778853484413 6.84593729039646 2481310.858585490 1.82241720857443 248.278111172563 25.6395529369225 -78.2205132466604 4223973.00605553 T 27 CATAB v2.0f-lin.ifort 2020-Feb-22 19:48:01 2020-Feb-22 19:48
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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