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17857 Hsieh (1998 KR1)
Classification: Main-belt Asteroid          SPK-ID: 2017857
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2051741360942102 3.5017e-08  
a 2.693386370540619 1.3075e-08 au
q 2.140773148797027 9.7787e-08 au
i 13.22904265016732 4.7609e-06 deg
node 50.94227501978426 1.6356e-05 deg
peri 271.344342817172 2.0792e-05 deg
M 283.1965764538223 1.5029e-05 deg
tp 2459344.948654474377
(2021-May-10.44865447)
6.8313e-05 TDB
period 1614.5310962111
4.42
1.1757e-05
3.219e-08
d
yr
n .2229749559143393 1.6237e-09 deg/d
Q 3.245999592284211 1.5758e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1915  
   data-arc span      18912 days (51.78 yr)  
   first obs. used      1968-10-23  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46944  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:16:11  

Additional Information
 Earth MOID = 1.17818 au 
 Jupiter MOID = 2.24126 au 
 T_jup = 3.303 
[ 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 13.1   n/a MPO445394  
diameter diameter 6.531 km 0.237 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.217   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17857 Hsieh           Discovered 1998 May 18 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Henry H. Hsieh (b. 1978) has studied the nature of the comet-like Themis-family minor planet (7968) = 133P/Elst-Pizarro and has surveyed the main belt for examples of similar transition objects.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050721/MPCPages.arcLast Updated: 2005-07-21

Alternate Designations
 1998 KR1 = 1968 UW2 = 1999 SF4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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