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JPL Small-Body Database Browser
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299 Thora
Classification: Main-belt Asteroid          SPK-ID: 2000299
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06198375319139478 3.3416e-08  
a 2.434183016740495 6.445e-09 au
q 2.283303217408168 8.2633e-08 au
i 1.606249242099289 3.3091e-06 deg
node 241.4824861039517 0.00012494 deg
peri 152.0781341033958 0.00012767 deg
M 42.83536137474285 2.6067e-05 deg
tp 2458835.445183052140
(2019-Dec-17.94518305)
0.00010044 TDB
period 1387.165467833904
3.80
5.5092e-06
1.508e-08
d
yr
n .2595220313277763 1.0307e-09 deg/d
Q 2.585062816072823 6.8445e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3015  
   data-arc span      31840 days (87.17 yr)  
   first obs. used      1932-11-04  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4189  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:22:05  

Additional Information
 Earth MOID = 1.28927 au 
 Jupiter MOID = 2.65592 au 
 T_jup = 3.502 
[ 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 11.3   n/a MPO302059  
diameter diameter 15.757 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 272.9 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Alvarez, E.M.; Pravec, P. (2014) Minor Planet Bull. 41, 209-210.]
[Pilcher, F.; Franco, L.; Pravec, P. (2017) Minor Planet Bull. 44, 270-274.]
geometric albedo albedo 0.251   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

299 Thora          Discovered 1890-Oct-06 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1935 PC = 1939 PK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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