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281 Lucretia (A888 UC)
Classification: Main-belt Asteroid          SPK-ID: 2000281
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.

Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1315331238719561 1.6521e-08  
a 2.187567787795197 4.2074e-09 au
q 1.89983016298483 3.6198e-08 au
i 5.30218118426703 1.0434e-06 deg
node 31.34385237703242 9.5083e-06 deg
peri 16.72618028338841 1.062e-05 deg
M 348.9934266177517 9.8051e-06 deg
tp 2459432.631861688395
3.2223e-05 TDB
period 1181.791076667075
n .3046223711684164 8.7883e-10 deg/d
Q 2.475305412605564 4.7608e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3468  
   data-arc span      47948 days (131.27 yr)  
   first obs. used      1890-04-16  
   last obs. used      2021-07-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38987  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:26:11  

Additional Information
 Earth MOID = .909581 au 
 Jupiter MOID = 2.87807 au 
 T_jup = 3.659 
[ 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 11.90   n/a E2021B10 IRAS observations used: 6
magnitude slope G 0.28   n/a PDS3 (MPC 17258) Fit
diameter diameter 11.036 km 0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 4.348 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Taylor, R.C.; Gehrels, T.; Capen, R.C. (1976) Astron. J. 81, 778-786.]
[Durech, J. (2006) IAU 2006, poster paper.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.226   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.918   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=6.59, mean=14.10, max.=21.70) deg.
U-B UB 0.530   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=6.59, mean=12.63, max.=21.03) deg.
Tholen spectral type spec_T SU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

281 Lucretia (A888 UC)          Discovered 1888-Oct-31 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A888 UC = 1948 EK = 1984 JX = A906 FD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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