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JPL Small-Body Database Browser
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440 Theodora (A898 TB)
Classification: Main-belt Asteroid          SPK-ID: 2000440
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1073543208022203 3.1873e-08  
a 2.210752855290298 5.4034e-09 au
q 1.973418984049039 6.9957e-08 au
i 1.596837251999137 3.4962e-06 deg
node 292.0555529276311 0.00012974 deg
peri 179.452739210464 0.00013088 deg
M 164.1750628059479 1.8103e-05 deg
tp 2458052.963079426756
(2017-Oct-26.46307943)		 5.9878e-05 TDB
period 1200.628694988546
3.29		 4.4018e-06
1.205e-08		 d
yr
n .2998429085550336 1.0993e-09 deg/d
Q 2.448086726531557 5.9835e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2850  
   data-arc span      44210 days (121.04 yr)  
   first obs. used      1898-10-15  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40482  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:53:25  

Additional Information
 Earth MOID = .990284 au 
 Jupiter MOID = 2.63187 au 
 T_jup = 3.649 
[ 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 11.5   n/a MPO435699  
diameter diameter 13.600 km 0.540 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 4.828 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Florczak, M.; Dotto, E.; Barucci, M.A.; Birlan, M.; et al. (1997) Planet. Space Sci. 45, 1423-1435.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.630   0.306 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

440 Theodora (A898 TB)          Discovered 1898-Oct-13 by Coddington, E. F. at Mount Hamilton
Reference: DISCOVERY.DBLast Updated: 2003-08-29
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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