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21521 Hippalgaonkar (1998 KU55)
Classification: Main-belt Asteroid          SPK-ID: 2021521
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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725249404424196 1.5845e-08  
a 2.558817293495438 8.2766e-09 au
q 2.117357492332104 4.0643e-08 au
i 8.122573141901327 7.3867e-07 deg
node 137.87856445 4.1774e-06 deg
peri 265.6975033764294 6.5669e-06 deg
M 47.62419149887368 4.9156e-06 deg
tp 2459002.719961202322
(2020-Jun-02.21996120)
2.0196e-05 TDB
period 1495.055595197829
4.09
7.2537e-06
1.986e-08
d
yr
n .2407937210872509 1.1683e-09 deg/d
Q 3.000277094658772 9.7045e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2612  
   data-arc span      13604 days (37.25 yr)  
   first obs. used      1983-12-05  
   last obs. used      2021-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43244  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:59:20  

Additional Information
 Earth MOID = 1.14353 au 
 Jupiter MOID = 2.44414 au 
 T_jup = 3.401 
[ 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 13.4   n/a MPO502326  
diameter diameter 6.161 km 0.185 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.226 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.203   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21521 Hippalgaonkar           Discovered 1998 May 23 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Varun Rajendra Hippalgaonkar (b. 1989) was awarded second place in the 2006 Intel International Science and Engineering Fair for his botany team project. He attends the Lake Highland Preparatory School, Orlando, Florida, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

Alternate Designations
 1998 KU55 = 1983 XZ1 = 1991 VA14 = 1991 VE15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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