Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2053461988438989 2.4542e-08  
a 2.694280476479802 1.245e-08 au
q 2.141020222015346 6.9894e-08 au
i 13.22694647060077 4.7836e-07 deg
node 50.9379186733749 2.0778e-06 deg
peri 271.2788256977841 2.8187e-06 deg
M 327.8566675511998 4.5888e-06 deg
tp 2459344.728481913575
(2021-May-10.22848191)
2.1216e-05 TDB
period 1615.335110993608
4.42
1.1196e-05
3.065e-08
d
yr
n .2228639726518175 1.5448e-09 deg/d
Q 3.247540730944258 1.5007e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1970  
   data-arc span      18931 days (51.83 yr)  
   first obs. used      1968-10-23  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46808  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:15:38  

Additional Information
 Earth MOID = 1.1766 au 
 Jupiter MOID = 2.23917 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-15 02:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin