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18244 Anneila (3008 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2018244
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1073348910463736 3.9334e-08  
a 2.727928779209047 1.3843e-08 au
q 2.435126840910377 1.0931e-07 au
i 9.09301397525763 4.8757e-06 deg
node 176.4315768855365 2.1584e-05 deg
peri 145.5319584311008 2.9947e-05 deg
M 205.5839018613175 2.1526e-05 deg
tp 2459906.391645277885
(2022-Nov-22.89164528)
9.9001e-05 TDB
period 1645.68976527182
4.51
1.2527e-05
3.43e-08
d
yr
n .2187532593304659 1.6651e-09 deg/d
Q 3.020730717507717 1.5329e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1041  
   data-arc span      17352 days (47.51 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52208  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:42:12  

Additional Information
 Earth MOID = 1.42764 au 
 Jupiter MOID = 2.3244 au 
 T_jup = 3.329 
[ 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 15.08   n/a MPCxxxxx  

18244 Anneila           Discovered 1973 Sept. 30 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Anneila Sargent (b. 1942), professor at the California Institute for Technology and director of the Owens Valley Radio Observatory, is known for her ground-breaking observations of protoplanetary disks around young stars using emerging millimeter interferometers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050919/MPCPages.arcLast Updated: 2005-09-26

Alternate Designations
 3008 T-2 = 1999 JB129 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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