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17857 Hsieh (1998 KR1)
Classification: Main-belt Asteroid          SPK-ID: 2017857
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2033652213597197 6.882e-08  
a 2.696439864659166 2.6391e-08 AU
q 2.148077774699582 1.849e-07 AU
i 13.22092042763616 7.8064e-06 deg
node 51.00561947757411 3.155e-05 deg
peri 271.1733585891839 3.7e-05 deg
M 197.5725128917314 2.0946e-05 deg
tp 2457730.195319172383
(2016-Dec-07.69531917)
9.6354e-05 JED
period 1617.277466879466
4.43
2.3743e-05
6.5e-08
d
yr
n .2225963122423385 3.2679e-09 deg/d
Q 3.24480195461875 3.1757e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      844  
   data-arc span      16875 days (46.20 yr)  
   first obs. used      1968-10-23  
   last obs. used      2015-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5169  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:49:57  

Additional Information
 Earth MOID = 1.18597 AU 
 T_jup = 3.302 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0 mag n/a MPO302174  

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 | Physical Parameters | Discovery Circumstances ]
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