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2391 Tomita (1957 AA)
Classification: Main-belt Asteroid          SPK-ID: 2002391
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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1336407732439543 1.0637e-08  
a 2.4402597474743 5.9303e-09 au
q 2.114141547905738 2.7275e-08 au
i 3.013782584121719 6.577e-07 deg
node 163.1746017474393 1.8664e-05 deg
peri 283.7743546109577 2.168e-05 deg
M 344.7605774947195 1.0618e-05 deg
tp 2459455.441138481327
(2021-Aug-28.94113848)
4.1163e-05 TDB
period 1392.363119135624
3.81
5.0755e-06
1.39e-08
d
yr
n .2585532430817956 9.4249e-10 deg/d
Q 2.766377947042863 6.7228e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3352  
   data-arc span      33345 days (91.29 yr)  
   first obs. used      1929-10-27  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43096  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:31:34  

Additional Information
 Earth MOID = 1.13289 au 
 Jupiter MOID = 2.42393 au 
 T_jup = 3.488 
[ 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 12.58   n/a E2021B10  
diameter diameter 17.941 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.9533 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2013) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.070   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2391 Tomita (1957 AA)          Discovered 1957-Jan-09 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1957 AA = 1929 VX = 1938 BF = 1942 DF = 1957 BA = 1977 KM = 1978 PA4 = 1980 DC6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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