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299 Thora (A890 TA)
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06224667405054512 1.4822e-08  
a 2.434122863039138 5.5777e-09 au
q 2.282606810584561 3.6541e-08 au
i 1.606109268847662 4.6643e-07 deg
node 241.4651445419989 1.039e-05 deg
peri 152.0773103017585 1.2225e-05 deg
M 145.5959860087787 7.3871e-06 deg
tp 2458835.504895538442
(2019-Dec-18.00489554)
2.8485e-05 TDB
period 1387.114048556144
3.80
4.7678e-06
1.305e-08
d
yr
n .2595316516148952 8.9207e-10 deg/d
Q 2.585638915493715 5.9249e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3820  
   data-arc span      32371 days (88.63 yr)  
   first obs. used      1932-11-04  
   last obs. used      2021-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39044  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:51:43  

Additional Information
 Earth MOID = 1.28787 au 
 Jupiter MOID = 2.65504 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 11.41   n/a MPO614063  
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. 2020-October); 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 (A890 TA)          Discovered 1890-Oct-06 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A890 TA = 1935 PC = 1939 PK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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