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JPL Small-Body Database Browser
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954 Li (A921 PC)
Classification: Main-belt Asteroid          SPK-ID: 2000954
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1732127238176342 3.6993e-08  
a 3.128905069765344 1.4234e-08 au
q 2.586938900064484 1.1631e-07 au
i 1.169560531470694 4.4038e-06 deg
node 163.2423921970972 0.00018422 deg
peri 151.358011327729 0.00018461 deg
M 212.5264413688988 1.4385e-05 deg
tp 2459428.630284022357
(2021-Aug-02.13028402)
8.3745e-05 TDB
period 2021.561729542312
5.53
1.3795e-05
3.777e-08
d
yr
n .178080142069916 1.2152e-09 deg/d
Q 3.670871239466204 1.67e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3080  
   data-arc span      41680 days (114.11 yr)  
   first obs. used      1905-10-26  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46611  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:51:03  

Additional Information
 Earth MOID = 1.57237 au 
 Jupiter MOID = 1.62102 au 
 T_jup = 3.190 
[ 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 10.2   n/a MPO473775 IRAS observations used: 18
diameter diameter 58.771 km 0.474 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.207 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shevchenko, V.G.; Chiorny, V.G.; Gaftonyuk, M.; Krugly, Y.N.; et al. (2008) Icarus 196, 601-611.]
geometric albedo albedo 0.060   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.625   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.04, mean=5.24, max.=8.44) deg.
U-B UB 0.310   0.042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.04, mean=5.24, max.=8.44) deg.
Tholen spectral type spec_T FCX   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

954 Li (A921 PC)          Discovered 1921-Aug-04 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A921 PC = 1943 PE = 1952 BE2 = A905 UN = A920 GC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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