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4943 Lac d'Orient (1987 OQ)
Classification: Main-belt Asteroid          SPK-ID: 2004943
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1771807895935522 1.7417e-08  
a 2.647084991014185 1.2864e-08 au
q 2.178072382185051 4.6553e-08 au
i 11.97580870407131 7.5687e-07 deg
node 241.374967891604 5.7517e-06 deg
peri 135.5572300383897 9.2531e-06 deg
M 228.5600763491878 1.1659e-05 deg
tp 2459774.847920052627
(2022-Jul-14.34792005)
5.3788e-05 TDB
period 1573.077992408496
4.31
1.1467e-05
3.139e-08
d
yr
n .2288507001797247 1.6682e-09 deg/d
Q 3.11609759984332 1.5143e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1895  
   data-arc span      14819 days (40.57 yr)  
   first obs. used      1979-12-14  
   last obs. used      2020-07-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4595  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:58:21  

Additional Information
 Earth MOID = 1.19758 au 
 Jupiter MOID = 2.39918 au 
 T_jup = 3.339 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.12   n/a E2021B10  
diameter diameter 6.439 km 0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.81 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:
[Klinglesmith III, D.A.; Hanowell, J.; Risley, E.; Turk, J.; et al. (2014) Minor Planet Bull. 41, 82-84.]
geometric albedo albedo 0.323   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4943 Lac d'Orient (1987 OQ)          Discovered 1987-Jul-27 by Elst, E. W. at Haute Provence
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1987 OQ = 1979 XR1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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