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21462 Karenedbal (1998 HC78)
Classification: Main-belt Asteroid          SPK-ID: 2021462
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1389887906848341 3.677e-08  
a 2.41838505769547 9.3522e-09 au
q 2.082256643116104 8.8609e-08 au
i 4.807248523941053 3.6361e-06 deg
node 234.10104304598 4.3792e-05 deg
peri 237.1395750394555 4.5616e-05 deg
M 144.2073555291911 1.1258e-05 deg
tp 2458846.235474990546
(2019-Dec-28.73547499)
4.3279e-05 TDB
period 1373.683251290911
3.76
7.9683e-06
2.182e-08
d
yr
n .2620691485185482 1.5202e-09 deg/d
Q 2.754513472274836 1.0652e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1651  
   data-arc span      14478 days (39.64 yr)  
   first obs. used      1981-10-30  
   last obs. used      2021-06-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48866  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:33:17  

Additional Information
 Earth MOID = 1.10383 au 
 Jupiter MOID = 2.37048 au 
 T_jup = 3.497 
[ 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 14.72   n/a E2020-QM5  
diameter diameter 6.458 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21462 Karenedbal           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Karen Nedbal mentored a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors. She teaches at the Brearley School, New York, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050224/MPCPages.arcLast Updated: 2005-02-28

Alternate Designations
 1998 HC78 = 1981 UC3 = 2000 WT57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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