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9494 Donici (3212 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2009494
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08478996794072639 3.3677e-08  
a 2.193168271950173 5.9395e-09 au
q 2.0072096044829 7.3805e-08 au
i 3.769789797525493 3.1831e-06 deg
node 6.116292156896102 5.2933e-05 deg
peri 65.17262546008939 5.6027e-05 deg
M 157.1599561556746 1.7991e-05 deg
tp 2458482.600184008206
(2018-Dec-30.10018401)
5.8973e-05 TDB
period 1186.332309563411
3.25
4.8192e-06
1.319e-08
d
yr
n .3034562888475031 1.2327e-09 deg/d
Q 2.379126939417447 6.4431e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2027  
   data-arc span      23833 days (65.25 yr)  
   first obs. used      1955-05-23  
   last obs. used      2020-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44906  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:13:16  

Additional Information
 Earth MOID = 1.02486 au 
 Jupiter MOID = 2.79839 au 
 T_jup = 3.664 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO358722  
diameter diameter 3.819 km 0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.304   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9494 Donici           Discovered 1971 Mar. 26 by C. J. van Houten and I. Van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Nicolae Donici (1875-1957), a founding member of the IAU and the first representative there of Romanian astronomy, was the most important messenger for Romanian astronomy around the world. Known for his research in solar physics, he observed six total solar eclipses. The name was suggested by M. Stavinschi.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 3212 T-1 = 1992 VE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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