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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2053997176201658 2.4182e-08  
a 2.694652180599371 1.2612e-08 au
q 2.141171383619696 6.8955e-08 au
i 13.22545619152129 4.7826e-07 deg
node 50.9088488962318 2.077e-06 deg
peri 271.2050717691071 2.8163e-06 deg
M 11.60201060240259 4.6908e-06 deg
tp 2459344.430517997778
(2021-May-09.93051800)
2.0815e-05 TDB
period 1615.669401036232
4.42
1.1343e-05
3.106e-08
d
yr
n .2228178609863559 1.5643e-09 deg/d
Q 3.248132977579046 1.5203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2015  
   data-arc span      19242 days (52.68 yr)  
   first obs. used      1968-10-23  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46695  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:30:19  

Additional Information
 Earth MOID = 1.17789 au 
 Jupiter MOID = 2.23724 au 
 T_jup = 3.302 
[ 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 13.15   n/a E2021B10  
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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