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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03570480420747095 3.5885e-08  
a 3.208772770348697 2.0076e-08 au
q 3.094204166837133 1.1363e-07 au
i 22.08461588881142 5.2538e-06 deg
node 177.8732618812464 9.884e-06 deg
peri 128.6536468074264 7.7758e-05 deg
M 204.650305771296 7.9017e-05 deg
tp 2460106.471997216725
(2023-Jun-10.97199722)
0.00046376 TDB
period 2099.45645929542
5.75
1.9703e-05
5.394e-08
d
yr
n .1714729535857183 1.6092e-09 deg/d
Q 3.323341373860261 2.0793e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1623  
   data-arc span      14644 days (40.09 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46691  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:16:37  

Additional Information
 Earth MOID = 2.11185 au 
 Jupiter MOID = 1.81173 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 13.19   n/a E2021B10  
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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