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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1321288696498349 3.3546e-08  
a 2.188326504068827 4.9785e-09 au
q 1.899185396661438 7.3338e-08 au
i 5.302023719513119 4.2629e-06 deg
node 31.39514479451376 4.1007e-05 deg
peri 16.53613245648689 4.4657e-05 deg
M 228.5942816173264 1.8176e-05 deg
tp 2459432.096954505548
(2021-Aug-05.59695451)
6.0261e-05 TDB
period 1182.405952604906
3.24
4.035e-06
1.105e-08
d
yr
n .3044639611352599 1.039e-09 deg/d
Q 2.477467611476216 5.6363e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3263  
   data-arc span      47528 days (130.12 yr)  
   first obs. used      1890-04-16  
   last obs. used      2020-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39709  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:10:59  

Additional Information
 Earth MOID = .909437 au 
 Jupiter MOID = 2.87629 au 
 T_jup = 3.658 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455980.5 (2012-Feb-23.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1324300388335291 3.3423e-08  
q 1.898011226343941 7.3036e-08 au
tp 2455886.100523521177
(2011-Nov-20.60052352)
5.6833e-05 TDB
node 31.44806106473481 4.1e-05 deg
peri 16.49142007890861 4.4644e-05 deg
i 5.303591019026518 4.2633e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3263  
   data-arc span      47528 days (130.12 yr)  
   first obs. used      1890-04-16  
   last obs. used      2020-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39709  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:10:59  

Additional Information
 Jupiter MOID = 2.87629 au 
 T_jup = 3.658 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.117099219124705E-15 -2.436722058661976E-15 -7.779079507318849E-13 8.925021399812801E-15 -2.561733308246674E-13 -2.887845030924801E-16
q -2.436722058661976E-15 5.334317348820921E-15 1.748516601561034E-12 -1.976497109883308E-14 5.735580984107685E-13 6.503917765798234E-16
tp -7.779079507318849E-13 1.748516601561034E-12 3.230015648712075E-9 -1.38785268180826E-11 1.016160939785214E-9 7.116504703604124E-13
node 8.925021399812801E-15 -1.976497109883308E-14 -1.38785268180826E-11 1.680990977578215E-9 -1.677732240229247E-9 -6.945631024829358E-11
peri -2.561733308246674E-13 5.735580984107685E-13 1.016160939785214E-9 -1.677732240229247E-9 1.993073636522804E-9 6.940902353380437E-11
i -2.887845030924801E-16 6.503917765798234E-16 7.116504703604124E-13 -6.945631024829358E-11 6.940902353380437E-11 1.817589412331914E-11

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 12.0   n/a MPO473764 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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.348 h n/a LCDB (Rev. 2019-August); 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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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

[ show close-approach data ]
Alternate Designations
 A888 UC = 1948 EK = 1984 JX = A906 FD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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