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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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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03577311545510792 3.5524e-08  
a 3.208232016137144 1.9579e-08 au
q 3.093463561817096 1.1299e-07 au
i 22.08736607457404 5.2145e-06 deg
node 177.8714754165263 9.1526e-06 deg
peri 128.9494595358354 7.6249e-05 deg
M 237.9575748630176 7.789e-05 deg
tp 2460108.049975238368
(2023-Jun-12.54997524)
0.00045672 TDB
period 2098.92576944695
5.75
1.9214e-05
5.261e-08
d
yr
n .1715163085995448 1.5701e-09 deg/d
Q 3.323000470457192 2.0279e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1747  
   data-arc span      14730 days (40.33 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4631  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 16:25:13  

Additional Information
 Earth MOID = 2.11187 au 
 Jupiter MOID = 1.812 au 
 T_jup = 3.076 
[ show covariance matrix ]

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 13.21   n/a MPCxxxxx  
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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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