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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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1073543225852903 3.1962e-08  
a 2.2107528560378 5.4982e-09 au
q 1.973418980774366 7.0094e-08 au
i 1.596837299377889 3.5106e-06 deg
node 292.0555597387487 0.00013318 deg
peri 179.4527295527421 0.00013435 deg
M 164.1750648871187 1.8321e-05 deg
tp 2458052.963072208185
(2017-Oct-26.46307221)
6.0667e-05 TDB
period 1200.628695597483
3.29
4.479e-06
1.226e-08
d
yr
n .2998429084029588 1.1186e-09 deg/d
Q 2.448086731301233 6.0884e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2744  
   data-arc span      44141 days (120.85 yr)  
   first obs. used      1898-10-15  
   last obs. used      2019-08-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40994  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:08:42  

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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