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18626 Michaelcarr (1998 DO23)
Classification: Inner Main-belt Asteroid          SPK-ID: 2018626
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08581124196960868 5.8042e-08  
a 1.913160185001398 7.634e-09 au
q 1.748989533439622 1.0829e-07 au
i 19.83773423879967 8.3203e-06 deg
node 10.23074130707233 1.4984e-05 deg
peri 53.30491825783351 5.1071e-05 deg
M 265.2651698072218 4.7271e-05 deg
tp 2459254.850507389784
(2021-Feb-09.35050739)
0.00012697 TDB
period 966.5524546145492
2.65
5.7852e-06
1.584e-08
d
yr
n .3724577991409314 2.2293e-09 deg/d
Q 2.077330836563174 8.2891e-09 au
  Orbit Determination Parameters
   # obs. used (total)      716  
   data-arc span      10075 days (27.58 yr)  
   first obs. used      1991-10-10  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48071  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:37:25  

Additional Information
 Earth MOID = .792 au 
 Jupiter MOID = 3.129 au 
 T_jup = 3.856 
[ 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 15.5   n/a MPO474012  

18626 Michaelcarr           Discovered 1998 Feb. 27 by the OCA-DLR Asteroid Survey at Caussols.
Michael Carr (b. 1947) is an instrument maker who worked at Caltech and then Princeton University. He aided in the Apollo lunar rocks analysis effort and contributed to several pioneering CCD astronomy instruments, such as HST's WFPC, Palomar's 4-shooter, Keck's LRIS and the SDSS survey camera.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

Alternate Designations
 1998 DO23 = 1991 VS2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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